Ubuntu update for linux-oem-5.10

1) Out-of-bounds read

EUVDB-ID: #VU90367

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-2021-3489

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

The vulnerability allows a local user to execute arbitrary code.

The vulnerability exists due to an out-of-bounds read error within the __bpf_ringbuf_reserve() function in kernel/bpf/ringbuf.c. A local user can execute arbitrary code.

Mitigation

Update the affected package linux-oem-5.10 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-oem-20.04b (Ubuntu package): before 5.10.0.1026.27

linux-image-5.10.0-1026-oem (Ubuntu package): before 5.10.0-1026.27

CPE2.3

External links

https://ubuntu.com/security/notices/USN-4948-1

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) Out-of-bounds write

EUVDB-ID: #VU55975

Risk: Low

CVSSv4.0: 8.5 [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:A/U:Clear]

CVE-ID: CVE-2021-3490

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

Exploit availability: Yes

Description

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

The vulnerability exists due to a boundary error when processing untrusted input in bpf. The eBPF ALU32 bounds tracking for bitwise ops (AND, OR and XOR) in the Linux kernel did not properly update 32-bit bounds, which could be turned into out of bounds reads and writes in the Linux kernel and therefore, arbitrary code execution. A local user can run a specially crafted program to trigger an out-of-bounds write and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package linux-oem-5.10 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-oem-20.04b (Ubuntu package): before 5.10.0.1026.27

linux-image-5.10.0-1026-oem (Ubuntu package): before 5.10.0-1026.27

CPE2.3

External links

https://ubuntu.com/security/notices/USN-4948-1

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?

Yes. This vulnerability is being exploited in the wild.

3) Out-of-bounds write

EUVDB-ID: #VU68301

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-2021-3491

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 the io_uring subsystem in the Linux kernel allowed the MAX_RW_COUNT limit to be bypassed in the PROVIDE_BUFFERS operation, which led to negative values being used in mem_rw when reading /proc/<PID>/mem. A local user can trigger a heap overflow and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package linux-oem-5.10 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-oem-20.04b (Ubuntu package): before 5.10.0.1026.27

linux-image-5.10.0-1026-oem (Ubuntu package): before 5.10.0-1026.27

CPE2.3

External links

https://ubuntu.com/security/notices/USN-4948-1

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.

4) 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-oem-5.10 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-oem-20.04b (Ubuntu package): before 5.10.0.1026.27

linux-image-5.10.0-1026-oem (Ubuntu package): before 5.10.0-1026.27

CPE2.3

External links

https://ubuntu.com/security/notices/USN-4948-1

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) 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-oem-5.10 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-oem-20.04b (Ubuntu package): before 5.10.0.1026.27

linux-image-5.10.0-1026-oem (Ubuntu package): before 5.10.0-1026.27

CPE2.3

External links

https://ubuntu.com/security/notices/USN-4948-1

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) 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-oem-5.10 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-oem-20.04b (Ubuntu package): before 5.10.0.1026.27

linux-image-5.10.0-1026-oem (Ubuntu package): before 5.10.0-1026.27

CPE2.3

External links

https://ubuntu.com/security/notices/USN-4948-1

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.

7) 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-oem-5.10 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-oem-20.04b (Ubuntu package): before 5.10.0.1026.27

linux-image-5.10.0-1026-oem (Ubuntu package): before 5.10.0-1026.27

CPE2.3

External links

https://ubuntu.com/security/notices/USN-4948-1

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) Improper locking

EUVDB-ID: #VU90811

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-2021-28951

CWE-ID: CWE-667 - Improper Locking

Exploit availability: No

Description

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

The vulnerability exists due to improper locking within the io_sq_offload_start(), io_disable_sqo_submit() and io_register_enable_rings() functions in fs/io_uring.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Update the affected package linux-oem-5.10 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-oem-20.04b (Ubuntu package): before 5.10.0.1026.27

linux-image-5.10.0-1026-oem (Ubuntu package): before 5.10.0-1026.27

CPE2.3

External links

https://ubuntu.com/security/notices/USN-4948-1

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: #VU59694

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-2021-28952

CWE-ID: CWE-119 - Memory corruption

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 the sound/soc/qcom/sdm845.c soundwire device driver in Linux kernel. A local user can run a specially crafted program to trigger a buffer overflow, when an unexpected port ID number is encountered, and execute arbitrary code on the system with elevated privileges.

Mitigation

Update the affected package linux-oem-5.10 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-oem-20.04b (Ubuntu package): before 5.10.0.1026.27

linux-image-5.10.0-1026-oem (Ubuntu package): before 5.10.0-1026.27

CPE2.3

External links

https://ubuntu.com/security/notices/USN-4948-1

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) 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-oem-5.10 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-oem-20.04b (Ubuntu package): before 5.10.0.1026.27

linux-image-5.10.0-1026-oem (Ubuntu package): before 5.10.0-1026.27

CPE2.3

External links

https://ubuntu.com/security/notices/USN-4948-1

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) 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-oem-5.10 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-oem-20.04b (Ubuntu package): before 5.10.0.1026.27

linux-image-5.10.0-1026-oem (Ubuntu package): before 5.10.0-1026.27

CPE2.3

External links

https://ubuntu.com/security/notices/USN-4948-1

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) 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-oem-5.10 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-oem-20.04b (Ubuntu package): before 5.10.0.1026.27

linux-image-5.10.0-1026-oem (Ubuntu package): before 5.10.0-1026.27

CPE2.3

External links

https://ubuntu.com/security/notices/USN-4948-1

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) 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-oem-5.10 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-oem-20.04b (Ubuntu package): before 5.10.0.1026.27

linux-image-5.10.0-1026-oem (Ubuntu package): before 5.10.0-1026.27

CPE2.3

External links

https://ubuntu.com/security/notices/USN-4948-1

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.

14) Use-after-free

EUVDB-ID: #VU60357

Risk: Low

CVSSv4.0: 4.4 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-29266

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 drivers/vhost/vdpa.c, because "v->config_ctx" has an invalid value upon re-opening a character device. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package linux-oem-5.10 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-oem-20.04b (Ubuntu package): before 5.10.0.1026.27

linux-image-5.10.0-1026-oem (Ubuntu package): before 5.10.0-1026.27

CPE2.3

External links

https://ubuntu.com/security/notices/USN-4948-1

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.

15) Input validation error

EUVDB-ID: #VU94153

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-2021-29646

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 tipc_nl_node_dump_monitor_peer() function in net/tipc/node.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Update the affected package linux-oem-5.10 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-oem-20.04b (Ubuntu package): before 5.10.0.1026.27

linux-image-5.10.0-1026-oem (Ubuntu package): before 5.10.0-1026.27

CPE2.3

External links

https://ubuntu.com/security/notices/USN-4948-1

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.

16) 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 - Exposure of sensitive information to an unauthorized actor

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-oem-5.10 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-oem-20.04b (Ubuntu package): before 5.10.0.1026.27

linux-image-5.10.0-1026-oem (Ubuntu package): before 5.10.0-1026.27

CPE2.3

External links

https://ubuntu.com/security/notices/USN-4948-1

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.

17) Memory leak

EUVDB-ID: #VU90487

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-2021-29649

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

Exploit availability: No

Description

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

The vulnerability exists due to memory leak within the umd_cleanup() function in kernel/usermode_driver.c, within the finish() and load_umd() functions in kernel/bpf/preload/bpf_preload_kern.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Update the affected package linux-oem-5.10 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-oem-20.04b (Ubuntu package): before 5.10.0.1026.27

linux-image-5.10.0-1026-oem (Ubuntu package): before 5.10.0-1026.27

CPE2.3

External links

https://ubuntu.com/security/notices/USN-4948-1

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.

18) Buffer overflow

EUVDB-ID: #VU56240

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-2021-29650

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

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

The vulnerability exists due to a boundary error within the netfilter subsystem in net/netfilter/x_tables.c and include/linux/netfilter/x_tables.h. A local user can trigger memory corruption upon the assignment of a new table value and cause denial of service.

Mitigation

Update the affected package linux-oem-5.10 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-oem-20.04b (Ubuntu package): before 5.10.0.1026.27

linux-image-5.10.0-1026-oem (Ubuntu package): before 5.10.0-1026.27

CPE2.3

External links

https://ubuntu.com/security/notices/USN-4948-1

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.

19) Use-after-free

EUVDB-ID: #VU65770

Risk: Medium

CVSSv4.0: 5.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-29657

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote user to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in arch/x86/kvm/svm/nested.c. An AMD KVM guest can bypass access control on host OS MSRs when there are nested guests and execute arbitrary code on the hypervisor.

Mitigation

Update the affected package linux-oem-5.10 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-oem-20.04b (Ubuntu package): before 5.10.0.1026.27

linux-image-5.10.0-1026-oem (Ubuntu package): before 5.10.0-1026.27

CPE2.3

External links

https://ubuntu.com/security/notices/USN-4948-1

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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

20) 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-oem-5.10 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-oem-20.04b (Ubuntu package): before 5.10.0.1026.27

linux-image-5.10.0-1026-oem (Ubuntu package): before 5.10.0-1026.27

CPE2.3

External links

https://ubuntu.com/security/notices/USN-4948-1

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.

21) 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-oem-5.10 to the latest version.

Vulnerable software versions

Ubuntu: 20.04

linux-image-oem-20.04b (Ubuntu package): before 5.10.0.1026.27

linux-image-5.10.0-1026-oem (Ubuntu package): before 5.10.0-1026.27

CPE2.3

External links

https://ubuntu.com/security/notices/USN-4948-1

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.

Risk	High
Patch available	YES
Number of vulnerabilities	21
CVE-ID	CVE-2021-3489 CVE-2021-3490 CVE-2021-3491 CVE-2020-25670 CVE-2020-25671 CVE-2020-25672 CVE-2021-28688 CVE-2021-28951 CVE-2021-28952 CVE-2021-28964 CVE-2021-28971 CVE-2021-28972 CVE-2021-29264 CVE-2021-29266 CVE-2021-29646 CVE-2021-29647 CVE-2021-29649 CVE-2021-29650 CVE-2021-29657 CVE-2021-31916 CVE-2021-3483
CWE-ID	CWE-125 CWE-787 CWE-416 CWE-401 CWE-665 CWE-667 CWE-119 CWE-362 CWE-400 CWE-20 CWE-200
Exploitation vector	Network
Public exploit	Vulnerability #2 is being exploited in the wild.
Vulnerable software	Ubuntu Operating systems & Components / Operating system linux-image-oem-20.04b (Ubuntu package) Operating systems & Components / Operating system package or component linux-image-5.10.0-1026-oem (Ubuntu package) Operating systems & Components / Operating system package or component
Vendor	Canonical Ltd.