SUSE-SU-2023:2708-1: important: Security update for the Linux Kernel (Live Patch 31 for SLE 12 SP4)

[sle-updates at lists.suse.com]

# Security update for the Linux Kernel (Live Patch 31 for SLE 12 SP4)

Announcement ID: SUSE-SU-2023:2708-1  
Rating: important  
References:

  * #1207189
  * #1210779
  * #1210989

  
Cross-References:

  * CVE-2023-1390
  * CVE-2023-23455
  * CVE-2023-31436

  
CVSS scores:

  * CVE-2023-1390 ( SUSE ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2023-1390 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2023-23455 ( SUSE ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2023-23455 ( NVD ):  5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
  * CVE-2023-31436 ( SUSE ):  7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2023-31436 ( NVD ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

  
Affected Products:

  * SUSE Linux Enterprise High Performance Computing 12 SP4
  * SUSE Linux Enterprise Live Patching 12-SP4
  * SUSE Linux Enterprise Server 12 SP4
  * SUSE Linux Enterprise Server for SAP Applications 12 SP4

  
  
An update that solves three vulnerabilities can now be installed.

## Description:

This update for the Linux Kernel 4.12.14-95_111 fixes several issues.

The following security issues were fixed:

  * CVE-2023-23455: Fixed a denial of service inside atm_tc_enqueue in
    net/sched/sch_atm.c because of type confusion (non-negative numbers can
    sometimes indicate a TC_ACT_SHOT condition rather than valid classification
    results) (bsc#1207189).
  * CVE-2023-31436: Fixed an out-of-bounds write in qfq_change_class() because
    lmax can exceed QFQ_MIN_LMAX (bsc#1210989).
  * CVE-2023-1390: Fixed remote DoS vulnerability in tipc_link_xmit()
    (bsc#1210779).

## Patch Instructions:

To install this SUSE Important 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-SP4-2023-2708=1

## Package List:

  * SUSE Linux Enterprise Live Patching 12-SP4 (ppc64le s390x x86_64)
    * kgraft-patch-4_12_14-95_111-default-8-2.2

## References:

  * https://www.suse.com/security/cve/CVE-2023-1390.html
  * https://www.suse.com/security/cve/CVE-2023-23455.html
  * https://www.suse.com/security/cve/CVE-2023-31436.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1207189
  * https://bugzilla.suse.com/show_bug.cgi?id=1210779
  * https://bugzilla.suse.com/show_bug.cgi?id=1210989

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