# Security update for the Linux Kernel (Live Patch 27 for SLE 15 SP3) Announcement ID: SUSE-SU-2023:4871-1 Rating: important References: * bsc#1215097 * bsc#1215442 * bsc#1215519 Cross-References: * CVE-2023-2163 * CVE-2023-3777 * CVE-2023-4622 CVSS scores: * CVE-2023-2163 ( SUSE ): 7.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N * CVE-2023-2163 ( NVD ): 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N * CVE-2023-3777 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H * CVE-2023-3777 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H * CVE-2023-4622 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H * CVE-2023-4622 ( NVD ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H Affected Products: * openSUSE Leap 15.3 * SUSE Linux Enterprise High Performance Computing 15 SP3 * SUSE Linux Enterprise Live Patching 15-SP3 * SUSE Linux Enterprise Micro 5.1 * SUSE Linux Enterprise Micro 5.2 * SUSE Linux Enterprise Server 15 SP3 * SUSE Linux Enterprise Server for SAP Applications 15 SP3 An update that solves three vulnerabilities can now be installed. ## Description: This update for the Linux Kernel 5.3.18-150300_59_106 fixes several issues. The following security issues were fixed: * CVE-2023-3777: Fixed a use-after-free vulnerability in netfilter: nf_tables component can be exploited to achieve local privilege escalation. (bsc#1215097) * CVE-2023-4622: Fixed a use-after-free vulnerability in the Unix domain sockets component which could be exploited to achieve local privilege escalation (bsc#1215442). * CVE-2023-2163: Fixed an incorrect verifier pruning in BPF that could lead to unsafe code paths being incorrectly marked as safe, resulting in arbitrary read/write in kernel memory, lateral privilege escalation, and container escape. (bsc#1215519) ## 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: * openSUSE Leap 15.3 zypper in -t patch SUSE-2023-4871=1 * SUSE Linux Enterprise Live Patching 15-SP3 zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP3-2023-4871=1 ## Package List: * openSUSE Leap 15.3 (ppc64le s390x x86_64) * kernel-livepatch-SLE15-SP3_Update_27-debugsource-11-150300.2.2 * kernel-livepatch-5_3_18-150300_59_106-default-11-150300.2.2 * kernel-livepatch-5_3_18-150300_59_106-default-debuginfo-11-150300.2.2 * openSUSE Leap 15.3 (x86_64) * kernel-livepatch-5_3_18-150300_59_106-preempt-debuginfo-11-150300.2.2 * kernel-livepatch-5_3_18-150300_59_106-preempt-11-150300.2.2 * SUSE Linux Enterprise Live Patching 15-SP3 (ppc64le s390x x86_64) * kernel-livepatch-5_3_18-150300_59_106-default-11-150300.2.2 ## References: * https://www.suse.com/security/cve/CVE-2023-2163.html * https://www.suse.com/security/cve/CVE-2023-3777.html * https://www.suse.com/security/cve/CVE-2023-4622.html * https://bugzilla.suse.com/show_bug.cgi?id=1215097 * https://bugzilla.suse.com/show_bug.cgi?id=1215442 * https://bugzilla.suse.com/show_bug.cgi?id=1215519