SUSE update for the Linux Kernel (Live Patch 1 for SLE 15 SP4)

Published: 2023-03-28 | Updated: 2023-03-30

Risk	Low
Patch available	YES
Number of vulnerabilities	3
CVE-ID	CVE-2023-0266 CVE-2023-1078 CVE-2023-26545
CWE-ID	CWE-416 CWE-787 CWE-415
Exploitation vector	Local
Public exploit	Vulnerability #1 is being exploited in the wild.
Vulnerable software	SUSE Linux Enterprise Live Patching Operating systems & Components / Operating system SUSE Linux Enterprise Micro Operating systems & Components / Operating system SUSE Linux Enterprise Server for SAP Applications 15 Operating systems & Components / Operating system SUSE Linux Enterprise Server 15 Operating systems & Components / Operating system SUSE Linux Enterprise Real Time 15 Operating systems & Components / Operating system SUSE Linux Enterprise High Performance Computing 15 Operating systems & Components / Operating system kernel-livepatch-5_3_18-150200_24_134-default Operating systems & Components / Operating system package or component kernel-livepatch-5_3_18-150200_24_134-default-debuginfo Operating systems & Components / Operating system package or component kernel-livepatch-SLE15-SP2_Update_31-debugsource Operating systems & Components / Operating system package or component kernel-livepatch-5_3_18-150300_59_90-default Operating systems & Components / Operating system package or component kernel-livepatch-5_3_18-150300_59_63-default Operating systems & Components / Operating system package or component kernel-livepatch-5_3_18-150300_59_76-default Operating systems & Components / Operating system package or component kernel-livepatch-5_3_18-150300_59_98-default Operating systems & Components / Operating system package or component kernel-livepatch-5_3_18-150300_59_68-default Operating systems & Components / Operating system package or component kernel-livepatch-5_3_18-150300_59_87-default Operating systems & Components / Operating system package or component kernel-livepatch-SLE15-SP4_Update_1-debugsource Operating systems & Components / Operating system package or component kernel-livepatch-5_14_21-150400_24_11-default Operating systems & Components / Operating system package or component kernel-livepatch-5_14_21-150400_24_11-default-debuginfo Operating systems & Components / Operating system package or component
Vendor	SUSE

Security Bulletin

This security bulletin contains information about 3 vulnerabilities.

1) Use-after-free

EUVDB-ID: #VU71482

Risk: High

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:Amber]

CVE-ID: CVE-2023-0266

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 snd_ctl_elem_read() function in the Linux kernel sound subsystem. A local user can trigger a use-after-free error and execute arbitrary code on the system.

Note, the vulnerability is being actively exploited in the wild.

Mitigation

Update the affected package the Linux Kernel (Live Patch 1 for SLE 15 SP4) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Live Patching: 15-SP2 - 15-SP4

SUSE Linux Enterprise Micro: 5.1 - 5.4

SUSE Linux Enterprise Server for SAP Applications 15: SP2 - SP4

SUSE Linux Enterprise Server 15: SP2 - SP4

SUSE Linux Enterprise Real Time 15: SP4

SUSE Linux Enterprise High Performance Computing 15: SP2 - SP4

kernel-livepatch-5_3_18-150200_24_134-default: before 6-150200.2.3

kernel-livepatch-5_3_18-150200_24_134-default-debuginfo: before 6-150200.2.3

kernel-livepatch-SLE15-SP2_Update_31-debugsource: before 6-150200.2.3

kernel-livepatch-5_3_18-150300_59_90-default: before 9-150300.2.3

kernel-livepatch-5_3_18-150300_59_63-default: before 14-150300.2.3

kernel-livepatch-5_3_18-150300_59_76-default: before 11-150300.2.3

kernel-livepatch-5_3_18-150300_59_98-default: before 6-150300.2.3

kernel-livepatch-5_3_18-150300_59_68-default: before 13-150300.2.3

kernel-livepatch-5_3_18-150300_59_87-default: before 10-150300.2.3

kernel-livepatch-SLE15-SP4_Update_1-debugsource: before 9-150400.2.3

kernel-livepatch-5_14_21-150400_24_11-default: before 9-150400.2.3

kernel-livepatch-5_14_21-150400_24_11-default-debuginfo: before 9-150400.2.3

CPE2.3

External links

https://www.suse.com/support/update/announcement/2023/suse-su-20231639-1/

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.

2) Out-of-bounds write

EUVDB-ID: #VU74054

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-2023-1078

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 within the rds_rm_zerocopy_callback() function in Linux kernel RDS (Reliable Datagram Sockets) protocol. A local user can trigger an out-of-bounds write and execute arbitrary code with elevated privileges.