ESB-2026.4951

=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2026.4951 Security update for the Linux Kernel RT (Live Patch 0 for SUSE Linux Enterprise 16) 12 May 2026 =========================================================================== AUSCERT Security Bulletin Summary --------------------------------- Product: Linux Kernel RT (Live Patch 0 for SUSE Linux Enterprise 16) Publisher: SUSE Operating System: SUSE Resolution: Patch/Upgrade CVE Names: CVE-2026-23437 CVE-2025-39977 CVE-2026-31406 CVE-2025-71066 CVE-2026-23004 CVE-2026-31431 CVE-2026-23204 Original Bulletin: https://www.suse.com/support/update/announcement/2026/suse-su-202621529-1 Comment: CVSS (Max): 7.8 CVE-2026-31431 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) CVSS Source: SUSE Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H The following are listed in the CISA Known Exploited Vulnerabilities (KEV) Catalog: CISA KEV CVE(s): CVE-2026-31431 CISA KEV URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog EPSS (Max): 3.9% (88th) CVE-2026-31431 2026-05-10 - --------------------------BEGIN INCLUDED TEXT-------------------- Security update for the Linux Kernel RT (Live Patch 0 for SUSE Linux Enterprise 16) Announcement ID: SUSE-SU-2026:21529-1 Release Date: 2026-05-05T22:29:56Z Rating: important o bsc#1252048 o bsc#1258005 o bsc#1258655 References: o bsc#1259126 o bsc#1261630 o bsc#1261845 o bsc#1263689 o CVE-2025-39977 o CVE-2025-71066 o CVE-2026-23004 Cross-References: o CVE-2026-23204 o CVE-2026-23437 o CVE-2026-31406 o CVE-2026-31431 o CVE-2025-39977 ( SUSE ): 7.3 CVSS:4.0/AV:L/AC:L/AT:P/PR:L /UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N o CVE-2025-39977 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N /S:U/C:H/I:H/A:H o CVE-2025-71066 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N /S:U/C:H/I:H/A:H o CVE-2026-23004 ( SUSE ): 7.3 CVSS:4.0/AV:L/AC:H/AT:N/PR:L /UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N o CVE-2026-23004 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N /S:U/C:H/I:H/A:H o CVE-2026-23004 ( NVD ): 4.7 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/ S:U/C:N/I:N/A:H o CVE-2026-23004 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/ S:U/C:H/I:H/A:H o CVE-2026-23204 ( SUSE ): 6.8 CVSS:4.0/AV:L/AC:L/AT:N/PR:L /UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N o CVE-2026-23204 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N /S:U/C:H/I:H/A:H o CVE-2026-23204 ( NVD ): 7.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/ S:U/C:H/I:N/A:H CVSS scores: o CVE-2026-23204 ( NVD ): 7.1 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/ S:U/C:H/I:N/A:H o CVE-2026-23437 ( SUSE ): 7.3 CVSS:4.0/AV:L/AC:H/AT:N/PR:L /UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N o CVE-2026-23437 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N /S:U/C:H/I:H/A:H o CVE-2026-23437 ( NVD ): 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/ S:U/C:N/I:N/A:H o CVE-2026-23437 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/ S:U/C:H/I:H/A:H o CVE-2026-31406 ( SUSE ): 7.3 CVSS:4.0/AV:L/AC:L/AT:P/PR:L /UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N o CVE-2026-31406 ( SUSE ): 7.0 CVSS:3.1/AV:L/AC:H/PR:L/UI:N /S:U/C:H/I:H/A:H o CVE-2026-31406 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/ S:U/C:H/I:H/A:H o CVE-2026-31431 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N /S:U/C:H/I:H/A:H o CVE-2026-31431 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/ S:U/C:H/I:H/A:H Affected o SUSE Linux Micro 6.2 Products: An update that solves seven vulnerabilities can now be installed. Description: This update for the SUSE Linux Enterprise Kernel 6.12.0-160000.5.1 fixes various security issues The following security issues were fixed: o CVE-2025-39977: futex: Prevent use-after-free during requeue-PI (bsc# 1252048). o CVE-2025-71066: net/sched: ets: Always remove class from active list before deleting in ets_qdisc_change (bsc#1258005). o CVE-2026-23004: dst: fix races in rt6_uncached_list_del() and rt_del_uncached_list() (bsc#1258655). o CVE-2026-23204: net/sched: cls_u32: use skb_header_pointer_careful() (bsc# 1259126). o CVE-2026-23437: net: shaper: protect late read accesses to the hierarchy (bsc#1261845). o CVE-2026-31406: xfrm: Fix work re-schedule after cancel in xfrm_nat_keepalive_net_fini() (bsc#1261630). o CVE-2026-31431: crypto: algif_aead - Revert to operating out-of-place (bsc# 1263689). 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: o SUSE Linux Micro 6.2 zypper in -t patch SUSE-SL-Micro-6.2-698=1 Package List: o SUSE Linux Micro 6.2 (x86_64) kernel-livepatch-6_12_0-160000_5-rt-9-160000.3.4 kernel-livepatch-SLE16-RT_Update_0-debugsource-9-160000.3.4 kernel-livepatch-6_12_0-160000_5-rt-debuginfo-9-160000.3.4 References: o https://www.suse.com/security/cve/CVE-2025-39977.html o https://www.suse.com/security/cve/CVE-2025-71066.html o https://www.suse.com/security/cve/CVE-2026-23004.html o https://www.suse.com/security/cve/CVE-2026-23204.html o https://www.suse.com/security/cve/CVE-2026-23437.html o https://www.suse.com/security/cve/CVE-2026-31406.html o https://www.suse.com/security/cve/CVE-2026-31431.html o https://bugzilla.suse.com/show_bug.cgi?id=1252048 o https://bugzilla.suse.com/show_bug.cgi?id=1258005 o https://bugzilla.suse.com/show_bug.cgi?id=1258655 o https://bugzilla.suse.com/show_bug.cgi?id=1259126 o https://bugzilla.suse.com/show_bug.cgi?id=1261630 o https://bugzilla.suse.com/show_bug.cgi?id=1261845 o https://bugzilla.suse.com/show_bug.cgi?id=1263689 - --------------------------END INCLUDED TEXT---------------------- You have received this e-mail bulletin as a result of your organisation's registration with AUSCERT. 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