A Linux Kernel RT (Live Patch 13 for SLE 15 SP4) has been released for openSUSE Leap 15.5 and SUSE Linux Enterprise.

SUSE-SU-2023:4164-1: important: Security update for the Linux Kernel RT (Live Patch 13 for SLE 15 SP4)

# 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-5_14_21-150400_15_53-rt-debuginfo-2-150400.2.1
* kernel-livepatch-SLE15-SP4-RT_Update_13-debugsource-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-2-150500.2.1
* kernel-livepatch-5_14_21-150500_13_18-rt-debuginfo-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-2-150500.2.1
* kernel-livepatch-5_14_21-150500_13_18-rt-debuginfo-2-150500.2.1

## References:

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