Security update for the Linux Kernel RT (Live Patch 1 for SLE 15 SP5) SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2023:4175-1 Final 1 1 2023-10-24T13:17:25Z current 2023-10-24T13:17:25Z 2023-10-24T13:17:25Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for the Linux Kernel RT (Live Patch 1 for SLE 15 SP5) This update for the Linux Kernel 5.14.21-150500_13_5 fixes several issues. The following security issues were fixed: - CVE-2023-4147: Fixed use-after-free in nf_tables_newrule (bsc#1215118). - 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-2023-4004: Fixed improper element removal netfilter nft_set_pipapo (bsc#1214812). - CVE-2023-3390: Fixed an use-after-free vulnerability in the netfilter subsystem in net/netfilter/nf_tables_api.c that could allow a local attacker with user access to cause a privilege escalation issue (bsc#1212934). The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). SUSE-2023-4175,SUSE-SLE-Module-Live-Patching-15-SP5-2023-4175 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-20234175-1/ Link for SUSE-SU-2023:4175-1 https://lists.suse.com/pipermail/sle-security-updates/2023-October/016827.html E-Mail link for SUSE-SU-2023:4175-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1212934 SUSE Bug 1212934 https://bugzilla.suse.com/1214812 SUSE Bug 1214812 https://bugzilla.suse.com/1215118 SUSE Bug 1215118 https://bugzilla.suse.com/1215440 SUSE Bug 1215440 https://www.suse.com/security/cve/CVE-2023-3390/ SUSE CVE CVE-2023-3390 page https://www.suse.com/security/cve/CVE-2023-4004/ SUSE CVE CVE-2023-4004 page https://www.suse.com/security/cve/CVE-2023-4147/ SUSE CVE CVE-2023-4147 page https://www.suse.com/security/cve/CVE-2023-4623/ SUSE CVE CVE-2023-4623 page SUSE Linux Enterprise Live Patching 15 SP5 kernel-livepatch-5_14_21-150500_13_5-rt-4-150500.2.1 kernel-livepatch-5_14_21-150500_13_5-rt-4-150500.2.1 as a component of SUSE Linux Enterprise Live Patching 15 SP5 A use-after-free vulnerability was found in the Linux kernel's netfilter subsystem in net/netfilter/nf_tables_api.c. Mishandled error handling with NFT_MSG_NEWRULE makes it possible to use a dangling pointer in the same transaction causing a use-after-free vulnerability. This flaw allows a local attacker with user access to cause a privilege escalation issue. We recommend upgrading past commit 1240eb93f0616b21c675416516ff3d74798fdc97. CVE-2023-3390 SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_13_5-rt-4-150500.2.1 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-20234175-1/ https://www.suse.com/security/cve/CVE-2023-3390.html CVE-2023-3390 https://bugzilla.suse.com/1212846 SUSE Bug 1212846 https://bugzilla.suse.com/1212934 SUSE Bug 1212934 https://bugzilla.suse.com/1216225 SUSE Bug 1216225 A use-after-free flaw was found in the Linux kernel's netfilter in the way a user triggers the nft_pipapo_remove function with the element, without a NFT_SET_EXT_KEY_END. This issue could allow a local user to crash the system or potentially escalate their privileges on the system. CVE-2023-4004 SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_13_5-rt-4-150500.2.1 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-20234175-1/ https://www.suse.com/security/cve/CVE-2023-4004.html CVE-2023-4004 https://bugzilla.suse.com/1213812 SUSE Bug 1213812 https://bugzilla.suse.com/1214812 SUSE Bug 1214812 A use-after-free flaw was found in the Linux kernel's Netfilter functionality when adding a rule with NFTA_RULE_CHAIN_ID. This flaw allows a local user to crash or escalate their privileges on the system. CVE-2023-4147 SUSE Linux Enterprise Live Patching 15 SP5:kernel-livepatch-5_14_21-150500_13_5-rt-4-150500.2.1 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-20234175-1/ https://www.suse.com/security/cve/CVE-2023-4147.html CVE-2023-4147 https://bugzilla.suse.com/1213968 SUSE Bug 1213968 https://bugzilla.suse.com/1215118 SUSE Bug 1215118 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 SP5:kernel-livepatch-5_14_21-150500_13_5-rt-4-150500.2.1 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-20234175-1/ 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