Security update for the Linux Kernel (Live Patch 31 for SLE 15)

SUSE Security Update: Security update for the Linux Kernel (Live Patch 31 for SLE 15)
Announcement ID: SUSE-SU-2022:4027-1
Rating: important
References: #1201742 #1201752 #1202087 #1203613 #1204170
Cross-References:CVE-2020-36557 CVE-2020-36558 CVE-2021-33655 CVE-2022-2588 CVE-2022-42703
Affected Products:
  • SUSE Linux Enterprise High Performance Computing 15
  • SUSE Linux Enterprise Module for Live Patching 15
  • SUSE Linux Enterprise Server 15
  • SUSE Linux Enterprise Server for SAP Applications 15

An update that fixes 5 vulnerabilities is now available.

Description:

This update for the Linux Kernel 4.12.14-150000_150_95 fixes several issues.
The following security issues were fixed:

  • CVE-2020-36557: Fixed a race condition between the VT_DISALLOCATE ioctl and closing/opening of ttys that could have led to a use-after-free (bnc#1201429).
  • CVE-2020-36558: Fixed a race condition involving VT_RESIZEX which could lead to a NULL pointer dereference and general protection fault (bnc#1200910).
  • CVE-2021-33655: Fixed out of bounds write with ioctl FBIOPUT_VSCREENINFO (bnc#1201635).
  • CVE-2022-2588: Fixed use-after-free in cls_route (bsc#1202096).
  • CVE-2022-42703: Fixed use-after-free in mm/rmap.c related to leaf anon_vma double reuse (bnc#1204168).

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 Module for Live Patching 15:
    zypper in -t patch SUSE-SLE-Module-Live-Patching-15-2022-4027=1

Package List:

  • SUSE Linux Enterprise Module for Live Patching 15 (ppc64le x86_64):
    • kernel-livepatch-4_12_14-150000_150_95-default-4-150000.2.1
    • kernel-livepatch-4_12_14-150000_150_95-default-debuginfo-4-150000.2.1

References: