SUSE update for the Linux Kernel (Live Patch 35 for SLE 12 SP5)

1) Race condition

EUVDB-ID: #VU67478

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-2022-39188

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 escalate privileges on the system.

The vulnerability exists due to a race condition within include/asm-generic/tlb.h in the Linux kernel. A local user can exploit the race and escalate privileges on the system.

Note, this only occurs in situations with VM_PFNMAP VMAs.

Mitigation

Update the affected package the Linux Kernel (Live Patch 35 for SLE 12 SP5) to the latest version.

Vulnerable software versions

SUSE Linux Enterprise Live Patching: 12-SP5

kgraft-patch-4_12_14-122_133-default: before 2-2.2

CPE2.3

• cpe:2.3:o:suse:suse_linux_enterprise_live_patching:12-SP5:*:*:*:*:*:*:*
• cpe:2.3:o:suse:kgraft-patch-4_12_14-122_133-default:*:*:*:*:*:suse_linux:*:*

External links

https://www.suse.com/support/update/announcement/2022/suse-su-20223379-1/

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.