SUSE-SU-2021:2026-1: important: Security update for the Linux Kernel (Live Patch 39 for SLE 12 SP3)

[sle-updates at lists.suse.com]

   SUSE Security Update: Security update for the Linux Kernel (Live Patch 39 for SLE 12 SP3)
______________________________________________________________________________

Announcement ID:    SUSE-SU-2021:2026-1
Rating:             important
References:         #1176931 #1182294 #1186235 #1186285 
Cross-References:   CVE-2020-0429 CVE-2021-28688 CVE-2021-33034
                   
CVSS scores:
                    CVE-2020-0429 (SUSE): 7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
                    CVE-2021-28688 (NVD) : 6.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
                    CVE-2021-28688 (SUSE): 6.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
                    CVE-2021-33034 (NVD) : 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
                    CVE-2021-33034 (SUSE): 7.7 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

Affected Products:
                    SUSE Linux Enterprise Server for SAP 12-SP3
                    SUSE Linux Enterprise Server 12-SP3-LTSS
______________________________________________________________________________

   An update that solves three vulnerabilities and has one
   errata is now available.

Description:

   This update for the Linux Kernel 4.4.180-94_144 fixes several issues.

   The following issues were fixed:

   - CVE-2021-33034: Fixed a use-after-free when destroying an hci_chan. This
     could lead to writing an arbitrary values (bsc#1186111).
   - CVE-2021-28688: Fixed an issue introduced by XSA-365, leaving around
     zombie domains after xen guest has died (bsc#1183646).
   - CVE-2020-0429: In l2tp_session_delete and related functions of
     l2tp_core.c, there is possible memory corruption due to a use after
     free. This could lead to local escalation of privilege with system
     execution privileges needed. (bsc#1176724).
   - Fixed a regression with the last livepatch which caused a kernel warning
     during sysfs read (bsc#1186235).


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 Server for SAP 12-SP3:

      zypper in -t patch SUSE-SLE-SAP-12-SP3-2021-2026=1

   - SUSE Linux Enterprise Server 12-SP3-LTSS:

      zypper in -t patch SUSE-SLE-SERVER-12-SP3-2021-2026=1



Package List:

   - SUSE Linux Enterprise Server for SAP 12-SP3 (ppc64le x86_64):

      kgraft-patch-4_4_180-94_144-default-2-2.1
      kgraft-patch-4_4_180-94_144-default-debuginfo-2-2.1

   - SUSE Linux Enterprise Server 12-SP3-LTSS (ppc64le x86_64):

      kgraft-patch-4_4_180-94_144-default-2-2.1
      kgraft-patch-4_4_180-94_144-default-debuginfo-2-2.1


References:

   https://www.suse.com/security/cve/CVE-2020-0429.html
   https://www.suse.com/security/cve/CVE-2021-28688.html
   https://www.suse.com/security/cve/CVE-2021-33034.html
   https://bugzilla.suse.com/1176931
   https://bugzilla.suse.com/1182294
   https://bugzilla.suse.com/1186235
   https://bugzilla.suse.com/1186285