Security update for the Linux Kernel (Live Patch 45 for SLE 15 SP3) SUSE Patch security@suse.de SUSE Security Team SUSE-SU-2024:2797-1 Final 1 1 2024-08-06T17:03:47Z current 2024-08-06T17:03:47Z 2024-08-06T17:03:47Z cve-database/bin/generate-cvrf.pl 2017-02-24T01:00:00Z Security update for the Linux Kernel (Live Patch 45 for SLE 15 SP3) This update for the Linux Kernel 5.3.18-150300_59_164 fixes several issues. The following security issues were fixed: - CVE-2024-26923: Fixed false-positive lockdep splat for spin_lock() in __unix_gc() (bsc#1223683). - CVE-2024-35950: drm/client: Fully protect modes with dev->mode_config.mutex (bsc#1225310). The CVRF data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0). SUSE-2024-2797,SUSE-2024-2798,SUSE-SLE-Module-Live-Patching-15-SP2-2024-2797,SUSE-SLE-Module-Live-Patching-15-SP3-2024-2798 Copyright SUSE LLC under the Creative Commons License 4.0 with Attribution (CC-BY-4.0) https://www.suse.com/support/update/announcement/2024/suse-su-20242797-1/ Link for SUSE-SU-2024:2797-1 https://lists.suse.com/pipermail/sle-updates/2024-August/036344.html E-Mail link for SUSE-SU-2024:2797-1 https://www.suse.com/support/security/rating/ SUSE Security Ratings https://bugzilla.suse.com/1223683 SUSE Bug 1223683 https://bugzilla.suse.com/1225310 SUSE Bug 1225310 https://www.suse.com/security/cve/CVE-2024-26923/ SUSE CVE CVE-2024-26923 page https://www.suse.com/security/cve/CVE-2024-35950/ SUSE CVE CVE-2024-35950 page SUSE Linux Enterprise Live Patching 15 SP2 SUSE Linux Enterprise Live Patching 15 SP3 kernel-livepatch-5_3_18-150200_24_194-default-2-150200.5.6.1 kernel-livepatch-5_3_18-150200_24_194-preempt-2-150200.5.6.1 kernel-livepatch-5_3_18-150300_59_164-default-2-150300.7.6.1 kernel-livepatch-5_3_18-150300_59_164-preempt-2-150300.7.6.1 kernel-livepatch-5_3_18-150200_24_194-default-2-150200.5.6.1 as a component of SUSE Linux Enterprise Live Patching 15 SP2 kernel-livepatch-5_3_18-150300_59_164-default-2-150300.7.6.1 as a component of SUSE Linux Enterprise Live Patching 15 SP3 In the Linux kernel, the following vulnerability has been resolved: af_unix: Fix garbage collector racing against connect() Garbage collector does not take into account the risk of embryo getting enqueued during the garbage collection. If such embryo has a peer that carries SCM_RIGHTS, two consecutive passes of scan_children() may see a different set of children. Leading to an incorrectly elevated inflight count, and then a dangling pointer within the gc_inflight_list. sockets are AF_UNIX/SOCK_STREAM S is an unconnected socket L is a listening in-flight socket bound to addr, not in fdtable V's fd will be passed via sendmsg(), gets inflight count bumped connect(S, addr) sendmsg(S, [V]); close(V) __unix_gc() ---------------- ------------------------- ----------- NS = unix_create1() skb1 = sock_wmalloc(NS) L = unix_find_other(addr) unix_state_lock(L) unix_peer(S) = NS // V count=1 inflight=0 NS = unix_peer(S) skb2 = sock_alloc() skb_queue_tail(NS, skb2[V]) // V became in-flight // V count=2 inflight=1 close(V) // V count=1 inflight=1 // GC candidate condition met for u in gc_inflight_list: if (total_refs == inflight_refs) add u to gc_candidates // gc_candidates={L, V} for u in gc_candidates: scan_children(u, dec_inflight) // embryo (skb1) was not // reachable from L yet, so V's // inflight remains unchanged __skb_queue_tail(L, skb1) unix_state_unlock(L) for u in gc_candidates: if (u.inflight) scan_children(u, inc_inflight_move_tail) // V count=1 inflight=2 (!) If there is a GC-candidate listening socket, lock/unlock its state. This makes GC wait until the end of any ongoing connect() to that socket. After flipping the lock, a possibly SCM-laden embryo is already enqueued. And if there is another embryo coming, it can not possibly carry SCM_RIGHTS. At this point, unix_inflight() can not happen because unix_gc_lock is already taken. Inflight graph remains unaffected. CVE-2024-26923 SUSE Linux Enterprise Live Patching 15 SP2:kernel-livepatch-5_3_18-150200_24_194-default-2-150200.5.6.1 SUSE Linux Enterprise Live Patching 15 SP3:kernel-livepatch-5_3_18-150300_59_164-default-2-150300.7.6.1 moderate 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/2024/suse-su-20242797-1/ https://www.suse.com/security/cve/CVE-2024-26923.html CVE-2024-26923 https://bugzilla.suse.com/1223384 SUSE Bug 1223384 https://bugzilla.suse.com/1223683 SUSE Bug 1223683 In the Linux kernel, the following vulnerability has been resolved: drm/client: Fully protect modes[] with dev->mode_config.mutex The modes[] array contains pointers to modes on the connectors' mode lists, which are protected by dev->mode_config.mutex. Thus we need to extend modes[] the same protection or by the time we use it the elements may already be pointing to freed/reused memory. CVE-2024-35950 SUSE Linux Enterprise Live Patching 15 SP2:kernel-livepatch-5_3_18-150200_24_194-default-2-150200.5.6.1 SUSE Linux Enterprise Live Patching 15 SP3:kernel-livepatch-5_3_18-150300_59_164-default-2-150300.7.6.1 moderate 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/2024/suse-su-20242797-1/ https://www.suse.com/security/cve/CVE-2024-35950.html CVE-2024-35950 https://bugzilla.suse.com/1224703 SUSE Bug 1224703 https://bugzilla.suse.com/1225310 SUSE Bug 1225310