SUSE update for the Linux Kernel



| Updated: 2025-01-10
Risk Medium
Patch available YES
Number of vulnerabilities 12
CVE-ID CVE-2020-36766
CVE-2023-1192
CVE-2023-1206
CVE-2023-1859
CVE-2023-2177
CVE-2023-4004
CVE-2023-40283
CVE-2023-42753
CVE-2023-4389
CVE-2023-4622
CVE-2023-4623
CVE-2023-4921
CWE-ID CWE-401
CWE-416
CWE-400
CWE-476
CWE-787
Exploitation vector Network
Public exploit Public exploit code for vulnerability #6 is available.
Vulnerable software
 SUSE Linux Enterprise Micro for Rancher
Operating systems & Components / Operating system

SUSE Linux Enterprise Micro
Operating systems & Components / Operating system

kernel-rt-debuginfo
Operating systems & Components / Operating system package or component

kernel-rt-debugsource
Operating systems & Components / Operating system package or component

kernel-rt
Operating systems & Components / Operating system package or component

Vendor SUSE

Security Bulletin

This security bulletin contains information about 12 vulnerabilities.

1) Memory leak

EUVDB-ID: #VU81922

Risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-36766

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

Exploit availability: No

Description

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

The vulnerability exists due memory leak in drivers/media/cec/core/cec-api.c in Linux kernel. A local user can force the system to leak memory.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Micro for Rancher: 5.2

SUSE Linux Enterprise Micro: 5.1 - 5.2

kernel-rt-debuginfo: before 5.3.18-150300.144.1

kernel-rt-debugsource: before 5.3.18-150300.144.1

kernel-rt: before 5.3.18-150300.144.1

CPE2.3 External links

https://www.suse.com/support/update/announcement/2023/suse-su-20234142-1/


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: #VU81923

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-2023-1192

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 within the smb2_is_status_io_timeout() function in Linux kernel. A local user can set environment variable to a specific value, trigger a use-after-free error and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Micro for Rancher: 5.2

SUSE Linux Enterprise Micro: 5.1 - 5.2

kernel-rt-debuginfo: before 5.3.18-150300.144.1

kernel-rt-debugsource: before 5.3.18-150300.144.1

kernel-rt: before 5.3.18-150300.144.1

CPE2.3 External links

https://www.suse.com/support/update/announcement/2023/suse-su-20234142-1/


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) Resource exhaustion

EUVDB-ID: #VU77953

Risk: Medium

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:Green]

CVE-ID: CVE-2023-1206

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a hash collision flaw in the IPv6 connection lookup table in the Linux kernel’s IPv6 functionality when an attacker makes a new kind of SYN flood attack. A remote attacker can increase the CPU usage of the server that accepts IPV6 connections up to 95%.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Micro for Rancher: 5.2

SUSE Linux Enterprise Micro: 5.1 - 5.2

kernel-rt-debuginfo: before 5.3.18-150300.144.1

kernel-rt-debugsource: before 5.3.18-150300.144.1

kernel-rt: before 5.3.18-150300.144.1

CPE2.3 External links

https://www.suse.com/support/update/announcement/2023/suse-su-20234142-1/


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) Use-after-free

EUVDB-ID: #VU75769

Risk: Medium

CVSSv4.0: 4.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2023-1859

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a malicious guest to gain access to sensitive information or perform a denial of service (DoS) attack.

The vulnerability exists due to a use-after-free error within the xen_9pfs_front_removet() function in net/9p/trans_xen.c in Xen transport for 9pfs. A malicious guest VM can trigger a use-after-free error and gain access to sensitive information of the hypervisor or crash it.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Micro for Rancher: 5.2

SUSE Linux Enterprise Micro: 5.1 - 5.2

kernel-rt-debuginfo: before 5.3.18-150300.144.1

kernel-rt-debugsource: before 5.3.18-150300.144.1

kernel-rt: before 5.3.18-150300.144.1

CPE2.3 External links

https://www.suse.com/support/update/announcement/2023/suse-su-20234142-1/


Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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

5) NULL pointer dereference

EUVDB-ID: #VU81924

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-2023-2177

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

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

The vulnerability exists due to a NULL pointer dereference error in the net/sctp/stream_sched.c in Linux kernel. A local user can pass specially crafted data to the system and perform a denial of service (DoS) attack.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Micro for Rancher: 5.2

SUSE Linux Enterprise Micro: 5.1 - 5.2

kernel-rt-debuginfo: before 5.3.18-150300.144.1

kernel-rt-debugsource: before 5.3.18-150300.144.1

kernel-rt: before 5.3.18-150300.144.1

CPE2.3 External links

https://www.suse.com/support/update/announcement/2023/suse-su-20234142-1/


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) Use-after-free

EUVDB-ID: #VU79498

Risk: Low

CVSSv4.0: 7.1 [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:P/U:Clear]

CVE-ID: CVE-2023-4004

CWE-ID: CWE-416 - Use After Free

Exploit availability: Yes

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 way a user triggers the nft_pipapo_remove function with the element, without a NFT_SET_EXT_KEY_END. A local user can execute arbitrary code with elevated privileges.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Micro for Rancher: 5.2

SUSE Linux Enterprise Micro: 5.1 - 5.2

kernel-rt-debuginfo: before 5.3.18-150300.144.1

kernel-rt-debugsource: before 5.3.18-150300.144.1

kernel-rt: before 5.3.18-150300.144.1

CPE2.3 External links

https://www.suse.com/support/update/announcement/2023/suse-su-20234142-1/


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. However, proof of concept for this vulnerability is available.

7) Use-after-free

EUVDB-ID: #VU79714

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-2023-40283

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 within the l2cap_sock_release() function in net/bluetooth/l2cap_sock.c. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Micro for Rancher: 5.2

SUSE Linux Enterprise Micro: 5.1 - 5.2

kernel-rt-debuginfo: before 5.3.18-150300.144.1

kernel-rt-debugsource: before 5.3.18-150300.144.1

kernel-rt: before 5.3.18-150300.144.1

CPE2.3 External links

https://www.suse.com/support/update/announcement/2023/suse-su-20234142-1/


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) Out-of-bounds write

EUVDB-ID: #VU81663

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-2023-42753

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 the netfilter subsystem in Linux kernel. A local user can trigger an out-of-bounds write and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Micro for Rancher: 5.2

SUSE Linux Enterprise Micro: 5.1 - 5.2

kernel-rt-debuginfo: before 5.3.18-150300.144.1

kernel-rt-debugsource: before 5.3.18-150300.144.1

kernel-rt: before 5.3.18-150300.144.1

CPE2.3 External links

https://www.suse.com/support/update/announcement/2023/suse-su-20234142-1/


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) Use-after-free

EUVDB-ID: #VU81925

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-2023-4389

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 within the btrfs_get_root_ref() function in fs/btrfs/disk-io.c. A local user can trigger a use-after-free error and execute arbitrary code on the system.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Micro for Rancher: 5.2

SUSE Linux Enterprise Micro: 5.1 - 5.2

kernel-rt-debuginfo: before 5.3.18-150300.144.1

kernel-rt-debugsource: before 5.3.18-150300.144.1

kernel-rt: before 5.3.18-150300.144.1

CPE2.3 External links

https://www.suse.com/support/update/announcement/2023/suse-su-20234142-1/


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) Use-after-free

EUVDB-ID: #VU80583

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-2023-4622

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 within the unix_stream_sendpage() function in af_unix component. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Micro for Rancher: 5.2

SUSE Linux Enterprise Micro: 5.1 - 5.2

kernel-rt-debuginfo: before 5.3.18-150300.144.1

kernel-rt-debugsource: before 5.3.18-150300.144.1

kernel-rt: before 5.3.18-150300.144.1

CPE2.3 External links

https://www.suse.com/support/update/announcement/2023/suse-su-20234142-1/


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) Use-after-free

EUVDB-ID: #VU81664

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-2023-4623

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 within the the Linux kernel net/sched: sch_hfsc (HFSC qdisc traffic control) component. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Micro for Rancher: 5.2

SUSE Linux Enterprise Micro: 5.1 - 5.2

kernel-rt-debuginfo: before 5.3.18-150300.144.1

kernel-rt-debugsource: before 5.3.18-150300.144.1

kernel-rt: before 5.3.18-150300.144.1

CPE2.3 External links

https://www.suse.com/support/update/announcement/2023/suse-su-20234142-1/


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) Use-after-free

EUVDB-ID: #VU81693

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-2023-4921

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 qfq_dequeue() function within the the Linux kernel's net/sched: sch_qfq component. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.

Mitigation

Update the affected package the Linux Kernel to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Micro for Rancher: 5.2

SUSE Linux Enterprise Micro: 5.1 - 5.2

kernel-rt-debuginfo: before 5.3.18-150300.144.1

kernel-rt-debugsource: before 5.3.18-150300.144.1

kernel-rt: before 5.3.18-150300.144.1

CPE2.3 External links

https://www.suse.com/support/update/announcement/2023/suse-su-20234142-1/


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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