Security update for the Linux Kernel RT (Live Patch 13 for SLE 15 SP4)

Announcement ID:	SUSE-SU-2023:4164-1
Rating:	important
References:	bsc#1215440
Cross-References:	CVE-2023-4623
CVSS scores:	CVE-2023-4623 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVE-2023-4623 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Products:	openSUSE Leap 15.5 SUSE Linux Enterprise High Performance Computing 15 SP4 SUSE Linux Enterprise High Performance Computing 15 SP5 SUSE Linux Enterprise Live Patching 15-SP4 SUSE Linux Enterprise Live Patching 15-SP5 SUSE Linux Enterprise Micro 5.3 SUSE Linux Enterprise Micro 5.4 SUSE Linux Enterprise Micro 5.5 SUSE Linux Enterprise Real Time 15 SP4 SUSE Linux Enterprise Real Time 15 SP5 SUSE Linux Enterprise Server 15 SP4 SUSE Linux Enterprise Server 15 SP5 SUSE Linux Enterprise Server for SAP Applications 15 SP4 SUSE Linux Enterprise Server for SAP Applications 15 SP5

An update that solves one vulnerability can now be installed.

Description:

This update for the Linux Kernel 5.14.21-150400_15_53 fixes one issue.

The following security issue was fixed:

• CVE-2023-4623: Fixed a use-after-free issue in the HFSC network scheduler which could be exploited to achieve local privilege escalation (bsc#1215440).

Patch Instructions:

To install this SUSE 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-SP4-2023-4167=1
• openSUSE Leap 15.5
  zypper in -t patch SUSE-2023-4164=1
• SUSE Linux Enterprise Live Patching 15-SP5
  zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP5-2023-4164=1

Package List:

• SUSE Linux Enterprise Live Patching 15-SP4 (x86_64)
  • kernel-livepatch-SLE15-SP4-RT_Update_13-debugsource-2-150400.2.1
  • kernel-livepatch-5_14_21-150400_15_53-rt-debuginfo-2-150400.2.1
  • kernel-livepatch-5_14_21-150400_15_53-rt-2-150400.2.1
• openSUSE Leap 15.5 (x86_64)
  • kernel-livepatch-SLE15-SP5-RT_Update_5-debugsource-2-150500.2.1
  • kernel-livepatch-5_14_21-150500_13_18-rt-debuginfo-2-150500.2.1
  • kernel-livepatch-5_14_21-150500_13_18-rt-2-150500.2.1
• SUSE Linux Enterprise Live Patching 15-SP5 (x86_64)
  • kernel-livepatch-SLE15-SP5-RT_Update_5-debugsource-2-150500.2.1
  • kernel-livepatch-5_14_21-150500_13_18-rt-debuginfo-2-150500.2.1
  • kernel-livepatch-5_14_21-150500_13_18-rt-2-150500.2.1

References:

• https://www.suse.com/security/cve/CVE-2023-4623.html
• https://bugzilla.suse.com/show_bug.cgi?id=1215440