Operating System:

[SUSE]

Published:

18 November 2022

Protect yourself against future threats.

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             AUSCERT External Security Bulletin Redistribution

                               ESB-2022.6024
      Security update for the Linux Kernel (Live Patch 31 for SLE 15)
                             18 November 2022

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           Linux Kernel
Publisher:         SUSE
Operating System:  SUSE
Resolution:        Patch/Upgrade
CVE Names:         CVE-2022-42703 CVE-2022-2588 CVE-2021-33655
                   CVE-2020-36558 CVE-2020-36557 

Original Bulletin: 
   https://www.suse.com/support/update/announcement/2022/suse-su-20224027-1

Comment: CVSS (Max):  7.8 CVE-2022-2588 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
         CVSS Source: SUSE
         Calculator:  https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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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:

  o 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).
  o CVE-2020-36558: Fixed a race condition involving VT_RESIZEX which could
    lead to a NULL pointer dereference and general protection fault (bnc#
    1200910).
  o CVE-2021-33655: Fixed out of bounds write with ioctl FBIOPUT_VSCREENINFO
    (bnc#1201635).
  o CVE-2022-2588: Fixed use-after-free in cls_route (bsc#1202096).
  o 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:

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

Package List:

  o 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:

  o https://www.suse.com/security/cve/CVE-2020-36557.html
  o https://www.suse.com/security/cve/CVE-2020-36558.html
  o https://www.suse.com/security/cve/CVE-2021-33655.html
  o https://www.suse.com/security/cve/CVE-2022-2588.html
  o https://www.suse.com/security/cve/CVE-2022-42703.html
  o https://bugzilla.suse.com/1201742
  o https://bugzilla.suse.com/1201752
  o https://bugzilla.suse.com/1202087
  o https://bugzilla.suse.com/1203613
  o https://bugzilla.suse.com/1204170

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===========================================================================
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