Ubuntu update for linux



Risk High
Patch available YES
Number of vulnerabilities 13
CVE-ID CVE-2020-25670
CVE-2020-25671
CVE-2020-25672
CVE-2020-25673
CVE-2021-28688
CVE-2021-28950
CVE-2021-28964
CVE-2021-28971
CVE-2021-28972
CVE-2021-29264
CVE-2021-29647
CVE-2021-31916
CVE-2021-3483
CWE-ID CWE-416
CWE-401
CWE-400
CWE-665
CWE-834
CWE-362
CWE-119
CWE-20
CWE-200
CWE-787
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Ubuntu
Operating systems & Components / Operating system

linux-image-raspi (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-gkeop (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-virtual-hwe-18.04 (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-virtual (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-raspi2 (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-oracle (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-oem-osp1 (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-oem (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-lowlatency (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-kvm (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-gkeop-5.4 (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-gke-5.4 (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-gke (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-generic-lpae (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-generic (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-gcp (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-azure (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-aws (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.4.0-74-lowlatency (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.4.0-74-generic-lpae (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.4.0-74-generic (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.4.0-1049-aws (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.4.0-1048-azure (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.4.0-1046-oracle (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.4.0-1044-gke (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.4.0-1044-gcp (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.4.0-1040-kvm (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.4.0-1036-raspi (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-5.4.0-1016-gkeop (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-raspi-hwe-18.04 (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-snapdragon-hwe-18.04 (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-lowlatency-hwe-18.04 (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-generic-lpae-hwe-18.04 (Ubuntu package)
Operating systems & Components / Operating system package or component

linux-image-generic-hwe-18.04 (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 13 vulnerabilities.

1) Use-after-free

EUVDB-ID: #VU63652

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-25670

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error in the NFC LLCP protocol implementation. A local user can perform manipulation with an unknown input for the llcp_sock_bind() function to crash or escalate their privileges on the system.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 18.04 - 20.04

linux-image-raspi (Ubuntu package): before 5.4.0.1036.71

linux-image-gkeop (Ubuntu package): before 5.4.0.1016.19

linux-image-virtual-hwe-18.04 (Ubuntu package): before 5.4.0.74.77

linux-image-virtual (Ubuntu package): before 5.4.0.74.77

linux-image-raspi2 (Ubuntu package): before 5.4.0.1036.71

linux-image-oracle (Ubuntu package): before 5.4.0.1046.45

linux-image-oem-osp1 (Ubuntu package): before 5.4.0.74.77

linux-image-oem (Ubuntu package): before 5.4.0.74.77

linux-image-lowlatency (Ubuntu package): before 5.4.0.74.77

linux-image-kvm (Ubuntu package): before 5.4.0.1040.38

linux-image-gkeop-5.4 (Ubuntu package): before 5.4.0.1016.17~18.04.17

linux-image-gke-5.4 (Ubuntu package): before 5.4.0.1044.46~18.04.10

linux-image-gke (Ubuntu package): before 5.4.0.1044.53

linux-image-generic-lpae (Ubuntu package): before 5.4.0.74.77

linux-image-generic (Ubuntu package): before 5.4.0.74.77

linux-image-gcp (Ubuntu package): before 5.4.0.1044.31

linux-image-azure (Ubuntu package): before 5.4.0.1048.27

linux-image-aws (Ubuntu package): before 5.4.0.1049.31

linux-image-5.4.0-74-lowlatency (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-74-generic-lpae (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-74-generic (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-1049-aws (Ubuntu package): before 5.4.0-1049.51~18.04.1

linux-image-5.4.0-1048-azure (Ubuntu package): before 5.4.0-1048.50~18.04.1

linux-image-5.4.0-1046-oracle (Ubuntu package): before 5.4.0-1046.50~18.04.2

linux-image-5.4.0-1044-gke (Ubuntu package): before 5.4.0-1044.46~18.04.1

linux-image-5.4.0-1044-gcp (Ubuntu package): before 5.4.0-1044.47~18.04.2

linux-image-5.4.0-1040-kvm (Ubuntu package): before 5.4.0-1040.41

linux-image-5.4.0-1036-raspi (Ubuntu package): before 5.4.0-1036.39~18.04.1

linux-image-5.4.0-1016-gkeop (Ubuntu package): before 5.4.0-1016.17~18.04.1

linux-image-raspi-hwe-18.04 (Ubuntu package): before 5.4.0.1036.38

linux-image-snapdragon-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-lowlatency-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-generic-lpae-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-generic-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4982-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Use-after-free

EUVDB-ID: #VU63653

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-25671

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error in the NFC LLCP protocol implementation. A local user can trigger the llcp_sock_connect() function to crash or escalate their privileges on the system.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 18.04 - 20.04

linux-image-raspi (Ubuntu package): before 5.4.0.1036.71

linux-image-gkeop (Ubuntu package): before 5.4.0.1016.19

linux-image-virtual-hwe-18.04 (Ubuntu package): before 5.4.0.74.77

linux-image-virtual (Ubuntu package): before 5.4.0.74.77

linux-image-raspi2 (Ubuntu package): before 5.4.0.1036.71

linux-image-oracle (Ubuntu package): before 5.4.0.1046.45

linux-image-oem-osp1 (Ubuntu package): before 5.4.0.74.77

linux-image-oem (Ubuntu package): before 5.4.0.74.77

linux-image-lowlatency (Ubuntu package): before 5.4.0.74.77

linux-image-kvm (Ubuntu package): before 5.4.0.1040.38

linux-image-gkeop-5.4 (Ubuntu package): before 5.4.0.1016.17~18.04.17

linux-image-gke-5.4 (Ubuntu package): before 5.4.0.1044.46~18.04.10

linux-image-gke (Ubuntu package): before 5.4.0.1044.53

linux-image-generic-lpae (Ubuntu package): before 5.4.0.74.77

linux-image-generic (Ubuntu package): before 5.4.0.74.77

linux-image-gcp (Ubuntu package): before 5.4.0.1044.31

linux-image-azure (Ubuntu package): before 5.4.0.1048.27

linux-image-aws (Ubuntu package): before 5.4.0.1049.31

linux-image-5.4.0-74-lowlatency (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-74-generic-lpae (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-74-generic (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-1049-aws (Ubuntu package): before 5.4.0-1049.51~18.04.1

linux-image-5.4.0-1048-azure (Ubuntu package): before 5.4.0-1048.50~18.04.1

linux-image-5.4.0-1046-oracle (Ubuntu package): before 5.4.0-1046.50~18.04.2

linux-image-5.4.0-1044-gke (Ubuntu package): before 5.4.0-1044.46~18.04.1

linux-image-5.4.0-1044-gcp (Ubuntu package): before 5.4.0-1044.47~18.04.2

linux-image-5.4.0-1040-kvm (Ubuntu package): before 5.4.0-1040.41

linux-image-5.4.0-1036-raspi (Ubuntu package): before 5.4.0-1036.39~18.04.1

linux-image-5.4.0-1016-gkeop (Ubuntu package): before 5.4.0-1016.17~18.04.1

linux-image-raspi-hwe-18.04 (Ubuntu package): before 5.4.0.1036.38

linux-image-snapdragon-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-lowlatency-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-generic-lpae-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-generic-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4982-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Memory leak

EUVDB-ID: #VU63654

Risk: High

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2020-25672

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform DoS attack on the target system.

The vulnerability exists due memory leak in the NFC LLCP protocol implementation when triggering the llcp_sock_connect() function. A remote attacker can force the application to leak memory and perform denial of service attack.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 18.04 - 20.04

linux-image-raspi (Ubuntu package): before 5.4.0.1036.71

linux-image-gkeop (Ubuntu package): before 5.4.0.1016.19

linux-image-virtual-hwe-18.04 (Ubuntu package): before 5.4.0.74.77

linux-image-virtual (Ubuntu package): before 5.4.0.74.77

linux-image-raspi2 (Ubuntu package): before 5.4.0.1036.71

linux-image-oracle (Ubuntu package): before 5.4.0.1046.45

linux-image-oem-osp1 (Ubuntu package): before 5.4.0.74.77

linux-image-oem (Ubuntu package): before 5.4.0.74.77

linux-image-lowlatency (Ubuntu package): before 5.4.0.74.77

linux-image-kvm (Ubuntu package): before 5.4.0.1040.38

linux-image-gkeop-5.4 (Ubuntu package): before 5.4.0.1016.17~18.04.17

linux-image-gke-5.4 (Ubuntu package): before 5.4.0.1044.46~18.04.10

linux-image-gke (Ubuntu package): before 5.4.0.1044.53

linux-image-generic-lpae (Ubuntu package): before 5.4.0.74.77

linux-image-generic (Ubuntu package): before 5.4.0.74.77

linux-image-gcp (Ubuntu package): before 5.4.0.1044.31

linux-image-azure (Ubuntu package): before 5.4.0.1048.27

linux-image-aws (Ubuntu package): before 5.4.0.1049.31

linux-image-5.4.0-74-lowlatency (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-74-generic-lpae (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-74-generic (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-1049-aws (Ubuntu package): before 5.4.0-1049.51~18.04.1

linux-image-5.4.0-1048-azure (Ubuntu package): before 5.4.0-1048.50~18.04.1

linux-image-5.4.0-1046-oracle (Ubuntu package): before 5.4.0-1046.50~18.04.2

linux-image-5.4.0-1044-gke (Ubuntu package): before 5.4.0-1044.46~18.04.1

linux-image-5.4.0-1044-gcp (Ubuntu package): before 5.4.0-1044.47~18.04.2

linux-image-5.4.0-1040-kvm (Ubuntu package): before 5.4.0-1040.41

linux-image-5.4.0-1036-raspi (Ubuntu package): before 5.4.0-1036.39~18.04.1

linux-image-5.4.0-1016-gkeop (Ubuntu package): before 5.4.0-1016.17~18.04.1

linux-image-raspi-hwe-18.04 (Ubuntu package): before 5.4.0.1036.38

linux-image-snapdragon-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-lowlatency-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-generic-lpae-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-generic-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4982-1


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

4) Resource exhaustion

EUVDB-ID: #VU63656

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-25673

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper control consumption of internal resources in non-blocking socket in llcp_sock_connect() function. A local user can trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 18.04 - 20.04

linux-image-raspi (Ubuntu package): before 5.4.0.1036.71

linux-image-gkeop (Ubuntu package): before 5.4.0.1016.19

linux-image-virtual-hwe-18.04 (Ubuntu package): before 5.4.0.74.77

linux-image-virtual (Ubuntu package): before 5.4.0.74.77

linux-image-raspi2 (Ubuntu package): before 5.4.0.1036.71

linux-image-oracle (Ubuntu package): before 5.4.0.1046.45

linux-image-oem-osp1 (Ubuntu package): before 5.4.0.74.77

linux-image-oem (Ubuntu package): before 5.4.0.74.77

linux-image-lowlatency (Ubuntu package): before 5.4.0.74.77

linux-image-kvm (Ubuntu package): before 5.4.0.1040.38

linux-image-gkeop-5.4 (Ubuntu package): before 5.4.0.1016.17~18.04.17

linux-image-gke-5.4 (Ubuntu package): before 5.4.0.1044.46~18.04.10

linux-image-gke (Ubuntu package): before 5.4.0.1044.53

linux-image-generic-lpae (Ubuntu package): before 5.4.0.74.77

linux-image-generic (Ubuntu package): before 5.4.0.74.77

linux-image-gcp (Ubuntu package): before 5.4.0.1044.31

linux-image-azure (Ubuntu package): before 5.4.0.1048.27

linux-image-aws (Ubuntu package): before 5.4.0.1049.31

linux-image-5.4.0-74-lowlatency (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-74-generic-lpae (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-74-generic (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-1049-aws (Ubuntu package): before 5.4.0-1049.51~18.04.1

linux-image-5.4.0-1048-azure (Ubuntu package): before 5.4.0-1048.50~18.04.1

linux-image-5.4.0-1046-oracle (Ubuntu package): before 5.4.0-1046.50~18.04.2

linux-image-5.4.0-1044-gke (Ubuntu package): before 5.4.0-1044.46~18.04.1

linux-image-5.4.0-1044-gcp (Ubuntu package): before 5.4.0-1044.47~18.04.2

linux-image-5.4.0-1040-kvm (Ubuntu package): before 5.4.0-1040.41

linux-image-5.4.0-1036-raspi (Ubuntu package): before 5.4.0-1036.39~18.04.1

linux-image-5.4.0-1016-gkeop (Ubuntu package): before 5.4.0-1016.17~18.04.1

linux-image-raspi-hwe-18.04 (Ubuntu package): before 5.4.0.1036.38

linux-image-snapdragon-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-lowlatency-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-generic-lpae-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-generic-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4982-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

5) Improper Initialization

EUVDB-ID: #VU63658

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-28688

CWE-ID: CWE-665 - Improper Initialization

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service attack.

The vulnerability exists due to improper initialization of pointers such that subsequent cleanup code wouldn't use uninitialized or stale values. A local user can perform a denial of service attack.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 18.04 - 20.04

linux-image-raspi (Ubuntu package): before 5.4.0.1036.71

linux-image-gkeop (Ubuntu package): before 5.4.0.1016.19

linux-image-virtual-hwe-18.04 (Ubuntu package): before 5.4.0.74.77

linux-image-virtual (Ubuntu package): before 5.4.0.74.77

linux-image-raspi2 (Ubuntu package): before 5.4.0.1036.71

linux-image-oracle (Ubuntu package): before 5.4.0.1046.45

linux-image-oem-osp1 (Ubuntu package): before 5.4.0.74.77

linux-image-oem (Ubuntu package): before 5.4.0.74.77

linux-image-lowlatency (Ubuntu package): before 5.4.0.74.77

linux-image-kvm (Ubuntu package): before 5.4.0.1040.38

linux-image-gkeop-5.4 (Ubuntu package): before 5.4.0.1016.17~18.04.17

linux-image-gke-5.4 (Ubuntu package): before 5.4.0.1044.46~18.04.10

linux-image-gke (Ubuntu package): before 5.4.0.1044.53

linux-image-generic-lpae (Ubuntu package): before 5.4.0.74.77

linux-image-generic (Ubuntu package): before 5.4.0.74.77

linux-image-gcp (Ubuntu package): before 5.4.0.1044.31

linux-image-azure (Ubuntu package): before 5.4.0.1048.27

linux-image-aws (Ubuntu package): before 5.4.0.1049.31

linux-image-5.4.0-74-lowlatency (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-74-generic-lpae (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-74-generic (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-1049-aws (Ubuntu package): before 5.4.0-1049.51~18.04.1

linux-image-5.4.0-1048-azure (Ubuntu package): before 5.4.0-1048.50~18.04.1

linux-image-5.4.0-1046-oracle (Ubuntu package): before 5.4.0-1046.50~18.04.2

linux-image-5.4.0-1044-gke (Ubuntu package): before 5.4.0-1044.46~18.04.1

linux-image-5.4.0-1044-gcp (Ubuntu package): before 5.4.0-1044.47~18.04.2

linux-image-5.4.0-1040-kvm (Ubuntu package): before 5.4.0-1040.41

linux-image-5.4.0-1036-raspi (Ubuntu package): before 5.4.0-1036.39~18.04.1

linux-image-5.4.0-1016-gkeop (Ubuntu package): before 5.4.0-1016.17~18.04.1

linux-image-raspi-hwe-18.04 (Ubuntu package): before 5.4.0.1036.38

linux-image-snapdragon-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-lowlatency-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-generic-lpae-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-generic-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4982-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

6) Excessive Iteration

EUVDB-ID: #VU58207

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-28950

CWE-ID: CWE-834 - Excessive Iteration

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to excessive iteration in fs/fuse/fuse_i.h in the Linux kernel. A local user can run a specially crafted program to perform a denial of service attack.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 18.04 - 20.04

linux-image-raspi (Ubuntu package): before 5.4.0.1036.71

linux-image-gkeop (Ubuntu package): before 5.4.0.1016.19

linux-image-virtual-hwe-18.04 (Ubuntu package): before 5.4.0.74.77

linux-image-virtual (Ubuntu package): before 5.4.0.74.77

linux-image-raspi2 (Ubuntu package): before 5.4.0.1036.71

linux-image-oracle (Ubuntu package): before 5.4.0.1046.45

linux-image-oem-osp1 (Ubuntu package): before 5.4.0.74.77

linux-image-oem (Ubuntu package): before 5.4.0.74.77

linux-image-lowlatency (Ubuntu package): before 5.4.0.74.77

linux-image-kvm (Ubuntu package): before 5.4.0.1040.38

linux-image-gkeop-5.4 (Ubuntu package): before 5.4.0.1016.17~18.04.17

linux-image-gke-5.4 (Ubuntu package): before 5.4.0.1044.46~18.04.10

linux-image-gke (Ubuntu package): before 5.4.0.1044.53

linux-image-generic-lpae (Ubuntu package): before 5.4.0.74.77

linux-image-generic (Ubuntu package): before 5.4.0.74.77

linux-image-gcp (Ubuntu package): before 5.4.0.1044.31

linux-image-azure (Ubuntu package): before 5.4.0.1048.27

linux-image-aws (Ubuntu package): before 5.4.0.1049.31

linux-image-5.4.0-74-lowlatency (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-74-generic-lpae (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-74-generic (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-1049-aws (Ubuntu package): before 5.4.0-1049.51~18.04.1

linux-image-5.4.0-1048-azure (Ubuntu package): before 5.4.0-1048.50~18.04.1

linux-image-5.4.0-1046-oracle (Ubuntu package): before 5.4.0-1046.50~18.04.2

linux-image-5.4.0-1044-gke (Ubuntu package): before 5.4.0-1044.46~18.04.1

linux-image-5.4.0-1044-gcp (Ubuntu package): before 5.4.0-1044.47~18.04.2

linux-image-5.4.0-1040-kvm (Ubuntu package): before 5.4.0-1040.41

linux-image-5.4.0-1036-raspi (Ubuntu package): before 5.4.0-1036.39~18.04.1

linux-image-5.4.0-1016-gkeop (Ubuntu package): before 5.4.0-1016.17~18.04.1

linux-image-raspi-hwe-18.04 (Ubuntu package): before 5.4.0.1036.38

linux-image-snapdragon-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-lowlatency-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-generic-lpae-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-generic-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4982-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

7) Race condition

EUVDB-ID: #VU63573

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-28964

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service attack.

The vulnerability exists due to a race condition in the get_old_root() function in fs/btrfs/ctree.c component in the Linux kernel. A local user can exploit the race and perform a denial of service attack.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 18.04 - 20.04

linux-image-raspi (Ubuntu package): before 5.4.0.1036.71

linux-image-gkeop (Ubuntu package): before 5.4.0.1016.19

linux-image-virtual-hwe-18.04 (Ubuntu package): before 5.4.0.74.77

linux-image-virtual (Ubuntu package): before 5.4.0.74.77

linux-image-raspi2 (Ubuntu package): before 5.4.0.1036.71

linux-image-oracle (Ubuntu package): before 5.4.0.1046.45

linux-image-oem-osp1 (Ubuntu package): before 5.4.0.74.77

linux-image-oem (Ubuntu package): before 5.4.0.74.77

linux-image-lowlatency (Ubuntu package): before 5.4.0.74.77

linux-image-kvm (Ubuntu package): before 5.4.0.1040.38

linux-image-gkeop-5.4 (Ubuntu package): before 5.4.0.1016.17~18.04.17

linux-image-gke-5.4 (Ubuntu package): before 5.4.0.1044.46~18.04.10

linux-image-gke (Ubuntu package): before 5.4.0.1044.53

linux-image-generic-lpae (Ubuntu package): before 5.4.0.74.77

linux-image-generic (Ubuntu package): before 5.4.0.74.77

linux-image-gcp (Ubuntu package): before 5.4.0.1044.31

linux-image-azure (Ubuntu package): before 5.4.0.1048.27

linux-image-aws (Ubuntu package): before 5.4.0.1049.31

linux-image-5.4.0-74-lowlatency (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-74-generic-lpae (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-74-generic (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-1049-aws (Ubuntu package): before 5.4.0-1049.51~18.04.1

linux-image-5.4.0-1048-azure (Ubuntu package): before 5.4.0-1048.50~18.04.1

linux-image-5.4.0-1046-oracle (Ubuntu package): before 5.4.0-1046.50~18.04.2

linux-image-5.4.0-1044-gke (Ubuntu package): before 5.4.0-1044.46~18.04.1

linux-image-5.4.0-1044-gcp (Ubuntu package): before 5.4.0-1044.47~18.04.2

linux-image-5.4.0-1040-kvm (Ubuntu package): before 5.4.0-1040.41

linux-image-5.4.0-1036-raspi (Ubuntu package): before 5.4.0-1036.39~18.04.1

linux-image-5.4.0-1016-gkeop (Ubuntu package): before 5.4.0-1016.17~18.04.1

linux-image-raspi-hwe-18.04 (Ubuntu package): before 5.4.0.1036.38

linux-image-snapdragon-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-lowlatency-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-generic-lpae-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-generic-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4982-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

8) Resource exhaustion

EUVDB-ID: #VU64830

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-28971

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to mishandling of PEBS status in a PEBS record In intel_pmu_drain_pebs_nhm in arch/x86/events/intel/ds.c in the Linux kernel. A local user can trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 18.04 - 20.04

linux-image-raspi (Ubuntu package): before 5.4.0.1036.71

linux-image-gkeop (Ubuntu package): before 5.4.0.1016.19

linux-image-virtual-hwe-18.04 (Ubuntu package): before 5.4.0.74.77

linux-image-virtual (Ubuntu package): before 5.4.0.74.77

linux-image-raspi2 (Ubuntu package): before 5.4.0.1036.71

linux-image-oracle (Ubuntu package): before 5.4.0.1046.45

linux-image-oem-osp1 (Ubuntu package): before 5.4.0.74.77

linux-image-oem (Ubuntu package): before 5.4.0.74.77

linux-image-lowlatency (Ubuntu package): before 5.4.0.74.77

linux-image-kvm (Ubuntu package): before 5.4.0.1040.38

linux-image-gkeop-5.4 (Ubuntu package): before 5.4.0.1016.17~18.04.17

linux-image-gke-5.4 (Ubuntu package): before 5.4.0.1044.46~18.04.10

linux-image-gke (Ubuntu package): before 5.4.0.1044.53

linux-image-generic-lpae (Ubuntu package): before 5.4.0.74.77

linux-image-generic (Ubuntu package): before 5.4.0.74.77

linux-image-gcp (Ubuntu package): before 5.4.0.1044.31

linux-image-azure (Ubuntu package): before 5.4.0.1048.27

linux-image-aws (Ubuntu package): before 5.4.0.1049.31

linux-image-5.4.0-74-lowlatency (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-74-generic-lpae (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-74-generic (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-1049-aws (Ubuntu package): before 5.4.0-1049.51~18.04.1

linux-image-5.4.0-1048-azure (Ubuntu package): before 5.4.0-1048.50~18.04.1

linux-image-5.4.0-1046-oracle (Ubuntu package): before 5.4.0-1046.50~18.04.2

linux-image-5.4.0-1044-gke (Ubuntu package): before 5.4.0-1044.46~18.04.1

linux-image-5.4.0-1044-gcp (Ubuntu package): before 5.4.0-1044.47~18.04.2

linux-image-5.4.0-1040-kvm (Ubuntu package): before 5.4.0-1040.41

linux-image-5.4.0-1036-raspi (Ubuntu package): before 5.4.0-1036.39~18.04.1

linux-image-5.4.0-1016-gkeop (Ubuntu package): before 5.4.0-1016.17~18.04.1

linux-image-raspi-hwe-18.04 (Ubuntu package): before 5.4.0.1036.38

linux-image-snapdragon-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-lowlatency-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-generic-lpae-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-generic-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4982-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

9) Buffer overflow

EUVDB-ID: #VU56819

Risk: Low

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-28972

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows a local user to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error in the drivers/pci/hotplug/rpadlpar_sysfs.c. A local administrator can trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 18.04 - 20.04

linux-image-raspi (Ubuntu package): before 5.4.0.1036.71

linux-image-gkeop (Ubuntu package): before 5.4.0.1016.19

linux-image-virtual-hwe-18.04 (Ubuntu package): before 5.4.0.74.77

linux-image-virtual (Ubuntu package): before 5.4.0.74.77

linux-image-raspi2 (Ubuntu package): before 5.4.0.1036.71

linux-image-oracle (Ubuntu package): before 5.4.0.1046.45

linux-image-oem-osp1 (Ubuntu package): before 5.4.0.74.77

linux-image-oem (Ubuntu package): before 5.4.0.74.77

linux-image-lowlatency (Ubuntu package): before 5.4.0.74.77

linux-image-kvm (Ubuntu package): before 5.4.0.1040.38

linux-image-gkeop-5.4 (Ubuntu package): before 5.4.0.1016.17~18.04.17

linux-image-gke-5.4 (Ubuntu package): before 5.4.0.1044.46~18.04.10

linux-image-gke (Ubuntu package): before 5.4.0.1044.53

linux-image-generic-lpae (Ubuntu package): before 5.4.0.74.77

linux-image-generic (Ubuntu package): before 5.4.0.74.77

linux-image-gcp (Ubuntu package): before 5.4.0.1044.31

linux-image-azure (Ubuntu package): before 5.4.0.1048.27

linux-image-aws (Ubuntu package): before 5.4.0.1049.31

linux-image-5.4.0-74-lowlatency (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-74-generic-lpae (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-74-generic (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-1049-aws (Ubuntu package): before 5.4.0-1049.51~18.04.1

linux-image-5.4.0-1048-azure (Ubuntu package): before 5.4.0-1048.50~18.04.1

linux-image-5.4.0-1046-oracle (Ubuntu package): before 5.4.0-1046.50~18.04.2

linux-image-5.4.0-1044-gke (Ubuntu package): before 5.4.0-1044.46~18.04.1

linux-image-5.4.0-1044-gcp (Ubuntu package): before 5.4.0-1044.47~18.04.2

linux-image-5.4.0-1040-kvm (Ubuntu package): before 5.4.0-1040.41

linux-image-5.4.0-1036-raspi (Ubuntu package): before 5.4.0-1036.39~18.04.1

linux-image-5.4.0-1016-gkeop (Ubuntu package): before 5.4.0-1016.17~18.04.1

linux-image-raspi-hwe-18.04 (Ubuntu package): before 5.4.0.1036.38

linux-image-snapdragon-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-lowlatency-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-generic-lpae-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-generic-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4982-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

10) Input validation error

EUVDB-ID: #VU93697

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-29264

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper input validation within the gfar_add_rx_frag() and gfar_clean_rx_ring() functions in drivers/net/ethernet/freescale/gianfar.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 18.04 - 20.04

linux-image-raspi (Ubuntu package): before 5.4.0.1036.71

linux-image-gkeop (Ubuntu package): before 5.4.0.1016.19

linux-image-virtual-hwe-18.04 (Ubuntu package): before 5.4.0.74.77

linux-image-virtual (Ubuntu package): before 5.4.0.74.77

linux-image-raspi2 (Ubuntu package): before 5.4.0.1036.71

linux-image-oracle (Ubuntu package): before 5.4.0.1046.45

linux-image-oem-osp1 (Ubuntu package): before 5.4.0.74.77

linux-image-oem (Ubuntu package): before 5.4.0.74.77

linux-image-lowlatency (Ubuntu package): before 5.4.0.74.77

linux-image-kvm (Ubuntu package): before 5.4.0.1040.38

linux-image-gkeop-5.4 (Ubuntu package): before 5.4.0.1016.17~18.04.17

linux-image-gke-5.4 (Ubuntu package): before 5.4.0.1044.46~18.04.10

linux-image-gke (Ubuntu package): before 5.4.0.1044.53

linux-image-generic-lpae (Ubuntu package): before 5.4.0.74.77

linux-image-generic (Ubuntu package): before 5.4.0.74.77

linux-image-gcp (Ubuntu package): before 5.4.0.1044.31

linux-image-azure (Ubuntu package): before 5.4.0.1048.27

linux-image-aws (Ubuntu package): before 5.4.0.1049.31

linux-image-5.4.0-74-lowlatency (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-74-generic-lpae (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-74-generic (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-1049-aws (Ubuntu package): before 5.4.0-1049.51~18.04.1

linux-image-5.4.0-1048-azure (Ubuntu package): before 5.4.0-1048.50~18.04.1

linux-image-5.4.0-1046-oracle (Ubuntu package): before 5.4.0-1046.50~18.04.2

linux-image-5.4.0-1044-gke (Ubuntu package): before 5.4.0-1044.46~18.04.1

linux-image-5.4.0-1044-gcp (Ubuntu package): before 5.4.0-1044.47~18.04.2

linux-image-5.4.0-1040-kvm (Ubuntu package): before 5.4.0-1040.41

linux-image-5.4.0-1036-raspi (Ubuntu package): before 5.4.0-1036.39~18.04.1

linux-image-5.4.0-1016-gkeop (Ubuntu package): before 5.4.0-1016.17~18.04.1

linux-image-raspi-hwe-18.04 (Ubuntu package): before 5.4.0.1036.38

linux-image-snapdragon-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-lowlatency-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-generic-lpae-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-generic-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4982-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

11) Information disclosure

EUVDB-ID: #VU57040

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-29647

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists due to an error in qrtr_recvmsg(0 function in net/qrtr/qrtr.c caused by a partially uninitialized data structure. A local user can read sensitive information from kernel memory.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 18.04 - 20.04

linux-image-raspi (Ubuntu package): before 5.4.0.1036.71

linux-image-gkeop (Ubuntu package): before 5.4.0.1016.19

linux-image-virtual-hwe-18.04 (Ubuntu package): before 5.4.0.74.77

linux-image-virtual (Ubuntu package): before 5.4.0.74.77

linux-image-raspi2 (Ubuntu package): before 5.4.0.1036.71

linux-image-oracle (Ubuntu package): before 5.4.0.1046.45

linux-image-oem-osp1 (Ubuntu package): before 5.4.0.74.77

linux-image-oem (Ubuntu package): before 5.4.0.74.77

linux-image-lowlatency (Ubuntu package): before 5.4.0.74.77

linux-image-kvm (Ubuntu package): before 5.4.0.1040.38

linux-image-gkeop-5.4 (Ubuntu package): before 5.4.0.1016.17~18.04.17

linux-image-gke-5.4 (Ubuntu package): before 5.4.0.1044.46~18.04.10

linux-image-gke (Ubuntu package): before 5.4.0.1044.53

linux-image-generic-lpae (Ubuntu package): before 5.4.0.74.77

linux-image-generic (Ubuntu package): before 5.4.0.74.77

linux-image-gcp (Ubuntu package): before 5.4.0.1044.31

linux-image-azure (Ubuntu package): before 5.4.0.1048.27

linux-image-aws (Ubuntu package): before 5.4.0.1049.31

linux-image-5.4.0-74-lowlatency (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-74-generic-lpae (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-74-generic (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-1049-aws (Ubuntu package): before 5.4.0-1049.51~18.04.1

linux-image-5.4.0-1048-azure (Ubuntu package): before 5.4.0-1048.50~18.04.1

linux-image-5.4.0-1046-oracle (Ubuntu package): before 5.4.0-1046.50~18.04.2

linux-image-5.4.0-1044-gke (Ubuntu package): before 5.4.0-1044.46~18.04.1

linux-image-5.4.0-1044-gcp (Ubuntu package): before 5.4.0-1044.47~18.04.2

linux-image-5.4.0-1040-kvm (Ubuntu package): before 5.4.0-1040.41

linux-image-5.4.0-1036-raspi (Ubuntu package): before 5.4.0-1036.39~18.04.1

linux-image-5.4.0-1016-gkeop (Ubuntu package): before 5.4.0-1016.17~18.04.1

linux-image-raspi-hwe-18.04 (Ubuntu package): before 5.4.0.1036.38

linux-image-snapdragon-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-lowlatency-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-generic-lpae-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-generic-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4982-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

12) Out-of-bounds write

EUVDB-ID: #VU63574

Risk: Low

CVSSv4.0: 5.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-31916

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a boundary error in list_devices in drivers/md/dm-ioctl.c in the Multi-device driver module. A special user (CAP_SYS_ADMIN) can trigger a buffer overflow in the ioctl for listing devices and escalate privileges on the system.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 18.04 - 20.04

linux-image-raspi (Ubuntu package): before 5.4.0.1036.71

linux-image-gkeop (Ubuntu package): before 5.4.0.1016.19

linux-image-virtual-hwe-18.04 (Ubuntu package): before 5.4.0.74.77

linux-image-virtual (Ubuntu package): before 5.4.0.74.77

linux-image-raspi2 (Ubuntu package): before 5.4.0.1036.71

linux-image-oracle (Ubuntu package): before 5.4.0.1046.45

linux-image-oem-osp1 (Ubuntu package): before 5.4.0.74.77

linux-image-oem (Ubuntu package): before 5.4.0.74.77

linux-image-lowlatency (Ubuntu package): before 5.4.0.74.77

linux-image-kvm (Ubuntu package): before 5.4.0.1040.38

linux-image-gkeop-5.4 (Ubuntu package): before 5.4.0.1016.17~18.04.17

linux-image-gke-5.4 (Ubuntu package): before 5.4.0.1044.46~18.04.10

linux-image-gke (Ubuntu package): before 5.4.0.1044.53

linux-image-generic-lpae (Ubuntu package): before 5.4.0.74.77

linux-image-generic (Ubuntu package): before 5.4.0.74.77

linux-image-gcp (Ubuntu package): before 5.4.0.1044.31

linux-image-azure (Ubuntu package): before 5.4.0.1048.27

linux-image-aws (Ubuntu package): before 5.4.0.1049.31

linux-image-5.4.0-74-lowlatency (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-74-generic-lpae (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-74-generic (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-1049-aws (Ubuntu package): before 5.4.0-1049.51~18.04.1

linux-image-5.4.0-1048-azure (Ubuntu package): before 5.4.0-1048.50~18.04.1

linux-image-5.4.0-1046-oracle (Ubuntu package): before 5.4.0-1046.50~18.04.2

linux-image-5.4.0-1044-gke (Ubuntu package): before 5.4.0-1044.46~18.04.1

linux-image-5.4.0-1044-gcp (Ubuntu package): before 5.4.0-1044.47~18.04.2

linux-image-5.4.0-1040-kvm (Ubuntu package): before 5.4.0-1040.41

linux-image-5.4.0-1036-raspi (Ubuntu package): before 5.4.0-1036.39~18.04.1

linux-image-5.4.0-1016-gkeop (Ubuntu package): before 5.4.0-1016.17~18.04.1

linux-image-raspi-hwe-18.04 (Ubuntu package): before 5.4.0.1036.38

linux-image-snapdragon-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-lowlatency-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-generic-lpae-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-generic-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4982-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

13) Use-after-free

EUVDB-ID: #VU63659

Risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-3483

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error in the Nosy driver in the Linux kernel. A local user can trigger use-after-free and to escalate privileges on the system.

Mitigation

Update the affected package linux to the latest version.

Vulnerable software versions

Ubuntu: 18.04 - 20.04

linux-image-raspi (Ubuntu package): before 5.4.0.1036.71

linux-image-gkeop (Ubuntu package): before 5.4.0.1016.19

linux-image-virtual-hwe-18.04 (Ubuntu package): before 5.4.0.74.77

linux-image-virtual (Ubuntu package): before 5.4.0.74.77

linux-image-raspi2 (Ubuntu package): before 5.4.0.1036.71

linux-image-oracle (Ubuntu package): before 5.4.0.1046.45

linux-image-oem-osp1 (Ubuntu package): before 5.4.0.74.77

linux-image-oem (Ubuntu package): before 5.4.0.74.77

linux-image-lowlatency (Ubuntu package): before 5.4.0.74.77

linux-image-kvm (Ubuntu package): before 5.4.0.1040.38

linux-image-gkeop-5.4 (Ubuntu package): before 5.4.0.1016.17~18.04.17

linux-image-gke-5.4 (Ubuntu package): before 5.4.0.1044.46~18.04.10

linux-image-gke (Ubuntu package): before 5.4.0.1044.53

linux-image-generic-lpae (Ubuntu package): before 5.4.0.74.77

linux-image-generic (Ubuntu package): before 5.4.0.74.77

linux-image-gcp (Ubuntu package): before 5.4.0.1044.31

linux-image-azure (Ubuntu package): before 5.4.0.1048.27

linux-image-aws (Ubuntu package): before 5.4.0.1049.31

linux-image-5.4.0-74-lowlatency (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-74-generic-lpae (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-74-generic (Ubuntu package): before 5.4.0-74.83~18.04.1

linux-image-5.4.0-1049-aws (Ubuntu package): before 5.4.0-1049.51~18.04.1

linux-image-5.4.0-1048-azure (Ubuntu package): before 5.4.0-1048.50~18.04.1

linux-image-5.4.0-1046-oracle (Ubuntu package): before 5.4.0-1046.50~18.04.2

linux-image-5.4.0-1044-gke (Ubuntu package): before 5.4.0-1044.46~18.04.1

linux-image-5.4.0-1044-gcp (Ubuntu package): before 5.4.0-1044.47~18.04.2

linux-image-5.4.0-1040-kvm (Ubuntu package): before 5.4.0-1040.41

linux-image-5.4.0-1036-raspi (Ubuntu package): before 5.4.0-1036.39~18.04.1

linux-image-5.4.0-1016-gkeop (Ubuntu package): before 5.4.0-1016.17~18.04.1

linux-image-raspi-hwe-18.04 (Ubuntu package): before 5.4.0.1036.38

linux-image-snapdragon-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-lowlatency-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-generic-lpae-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

linux-image-generic-hwe-18.04 (Ubuntu package): before 5.4.0.74.83~18.04.67

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4982-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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