SUSE-SU-2023:2743-1: important: Security update for the Linux Kernel (Live Patch 6 for SLE 15 SP4)

[sle-security-updates at lists.suse.com]

# Security update for the Linux Kernel (Live Patch 6 for SLE 15 SP4)

Announcement ID: SUSE-SU-2023:2743-1  
Rating: important  
References:

  * #1207189
  * #1210452
  * #1210989

  
Cross-References:

  * CVE-2023-23455
  * CVE-2023-28466
  * CVE-2023-31436

  
CVSS scores:

  * 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-2023-28466 ( SUSE ):  7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  * CVE-2023-28466 ( NVD ):  7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/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 15 SP4
  * SUSE Linux Enterprise Live Patching 15-SP4
  * SUSE Linux Enterprise Micro 5.3
  * SUSE Linux Enterprise Micro 5.4
  * SUSE Linux Enterprise Real Time 15 SP4
  * SUSE Linux Enterprise Server 15 SP4
  * SUSE Linux Enterprise Server for SAP Applications 15 SP4

  
  
An update that solves three vulnerabilities can now be installed.

## Description:

This update for the Linux Kernel 5.14.21-150400_24_38 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-2023-28466: Fixed race condition that could lead to use-after-free or
    NULL pointer dereference in do_tls_getsockopt in net/tls/tls_main.c
    (bsc#1210452).

## 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 15-SP4  
    zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP4-2023-2743=1

## Package List:

  * SUSE Linux Enterprise Live Patching 15-SP4 (ppc64le s390x x86_64)
    * kernel-livepatch-5_14_21-150400_24_38-default-7-150400.2.3
    * kernel-livepatch-5_14_21-150400_24_38-default-debuginfo-7-150400.2.3
    * kernel-livepatch-SLE15-SP4_Update_6-debugsource-7-150400.2.3

## References:

  * https://www.suse.com/security/cve/CVE-2023-23455.html
  * https://www.suse.com/security/cve/CVE-2023-28466.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=1210452
  * https://bugzilla.suse.com/show_bug.cgi?id=1210989

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