Security update for the Linux Kernel (Live Patch 23 for SLE 12 SP4)

SUSE Security Update: Security update for the Linux Kernel (Live Patch 23 for SLE 12 SP4)
Announcement ID: SUSE-SU-2022:2444-1
Rating: important
References: #1199697 #1200059 #1200608
Cross-References:CVE-2022-1729 CVE-2022-20154 CVE-2022-21499
Affected Products:
  • SUSE Linux Enterprise Live Patching 12-SP4

An update that fixes three vulnerabilities is now available.

Description:

This update for the Linux Kernel 4.12.14-95_83 fixes several issues.
The following security issues were fixed:

  • CVE-2022-20154: Fixed a use after free due to a race condition in lock_sock_nested of sock.c. This could lead to local escalation of privilege with System execution privileges needed (bsc#1200599).
  • CVE-2022-21499: Reinforced the kernel lockdown feature, until now it's been trivial to break out of it with kgdb or kdb (bsc#1199426).
  • CVE-2022-1729: Fixed a sys_perf_event_open() race condition against self (bsc#1199507).

Patch Instructions:

To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Alternatively you can run the command listed for your product:

  • SUSE Linux Enterprise Live Patching 12-SP4:
    zypper in -t patch SUSE-SLE-Live-Patching-12-SP4-2022-2444=1

Package List:

  • SUSE Linux Enterprise Live Patching 12-SP4 (ppc64le s390x x86_64):
    • kgraft-patch-4_12_14-95_83-default-11-2.3

References: