# 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