Security update for the Linux Kernel (Live Patch 40 for SLE 15 SP2) SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2023:4243-1 Final 1 1 2023-10-30T08:49:03Z current 2023-10-30T08:49:03Z 2023-10-30T08:49:03Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for the Linux Kernel (Live Patch 40 for SLE 15 SP2) This update for the Linux Kernel 5.3.18-150200_24_163 fixes several issues. The following security issues were 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). - CVE-2023-1829: Fixed a use-after-free vulnerability in the control index filter (tcindex) (bsc#1210619). The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). SUSE-2023-4243,SUSE-SLE-Module-Live-Patching-15-SP2-2023-4243 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://www.suse.com/support/update/announcement/2023/suse-su-20234243-1/ Link for SUSE-SU-2023:4243-1 https://lists.suse.com/pipermail/sle-security-updates/2023-October/016915.html E-Mail link for SUSE-SU-2023:4243-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1210619 SUSE Bug 1210619 https://bugzilla.suse.com/1215440 SUSE Bug 1215440 https://www.suse.com/security/cve/CVE-2023-1829/ SUSE CVE CVE-2023-1829 page https://www.suse.com/security/cve/CVE-2023-4623/ SUSE CVE CVE-2023-4623 page SUSE Linux Enterprise Live Patching 15 SP2 kernel-livepatch-5_3_18-150200_24_163-default-2-150200.2.1 kernel-livepatch-5_3_18-150200_24_163-preempt-2-150200.2.1 kernel-livepatch-5_3_18-150200_24_163-default-2-150200.2.1 as a component of SUSE Linux Enterprise Live Patching 15 SP2 A use-after-free vulnerability in the Linux Kernel traffic control index filter (tcindex) can be exploited to achieve local privilege escalation. The tcindex_delete function which does not properly deactivate filters in case of a perfect hashes while deleting the underlying structure which can later lead to double freeing the structure. A local attacker user can use this vulnerability to elevate its privileges to root. We recommend upgrading past commit 8c710f75256bb3cf05ac7b1672c82b92c43f3d28. CVE-2023-1829 SUSE Linux Enterprise Live Patching 15 SP2:kernel-livepatch-5_3_18-150200_24_163-default-2-150200.2.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2023/suse-su-20234243-1/ https://www.suse.com/security/cve/CVE-2023-1829.html CVE-2023-1829 https://bugzilla.suse.com/1210335 SUSE Bug 1210335 https://bugzilla.suse.com/1210619 SUSE Bug 1210619 https://bugzilla.suse.com/1217444 SUSE Bug 1217444 https://bugzilla.suse.com/1217531 SUSE Bug 1217531 https://bugzilla.suse.com/1220886 SUSE Bug 1220886 https://bugzilla.suse.com/1228311 SUSE Bug 1228311 A use-after-free vulnerability in the Linux kernel's net/sched: sch_hfsc (HFSC qdisc traffic control) component can be exploited to achieve local privilege escalation. If a class with a link-sharing curve (i.e. with the HFSC_FSC flag set) has a parent without a link-sharing curve, then init_vf() will call vttree_insert() on the parent, but vttree_remove() will be skipped in update_vf(). This leaves a dangling pointer that can cause a use-after-free. We recommend upgrading past commit b3d26c5702c7d6c45456326e56d2ccf3f103e60f. CVE-2023-4623 SUSE Linux Enterprise Live Patching 15 SP2:kernel-livepatch-5_3_18-150200_24_163-default-2-150200.2.1 important To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch". https://www.suse.com/support/update/announcement/2023/suse-su-20234243-1/ https://www.suse.com/security/cve/CVE-2023-4623.html CVE-2023-4623 https://bugzilla.suse.com/1215115 SUSE Bug 1215115 https://bugzilla.suse.com/1215440 SUSE Bug 1215440 https://bugzilla.suse.com/1217444 SUSE Bug 1217444 https://bugzilla.suse.com/1217531 SUSE Bug 1217531 https://bugzilla.suse.com/1219698 SUSE Bug 1219698 https://bugzilla.suse.com/1221578 SUSE Bug 1221578 https://bugzilla.suse.com/1221598 SUSE Bug 1221598