ESB-2026.5322

=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2026.5322 Security update for the Linux Kernel 19 May 2026 =========================================================================== AUSCERT Security Bulletin Summary --------------------------------- Product: Linux Kernel Publisher: SUSE Operating System: SUSE Resolution: Patch/Upgrade CVE Names: CVE-2026-43284 CVE-2026-43500 CVE-2025-54518 CVE-2026-46333 CVE-2026-46300 Original Bulletin: https://www.suse.com/support/update/announcement/2026/suse-su-20261899-1 Comment: CVSS (Max): 8.8 CVE-2026-46300 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H) CVSS Source: Red Hat, [SUSE] Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H EPSS (Max): 0.0% (7th)* CVE-2026-46333 2026-05-17 * Not all EPSS found when published - --------------------------BEGIN INCLUDED TEXT-------------------- Security update for the Linux Kernel Announcement ID: SUSE-SU-2026:1899-1 Release Date: 2026-05-17T13:17:08Z Rating: important o bsc#1264013 o bsc#1264449 References: o bsc#1264450 o bsc#1265209 o bsc#1265308 o CVE-2025-54518 o CVE-2026-43284 Cross-References: o CVE-2026-43500 o CVE-2026-46300 o CVE-2026-46333 o CVE-2025-54518 ( 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-2025-54518 ( SUSE ): 7.4 CVSS:3.1/AV:L/AC:H/PR:N/UI:N /S:U/C:H/I:H/A:H o CVE-2025-54518 ( NVD ): 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/E:X/CR:X/IR:X/AR:X/ MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/ MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X o CVE-2026-43284 ( SUSE ): 8.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N /S:C/C:H/I:H/A:H o CVE-2026-43284 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:H/PR:L/UI:N/ S:C/C:H/I:H/A:H o CVE-2026-43284 ( NVD ): 8.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/ CVSS scores: S:C/C:H/I:H/A:H o CVE-2026-43500 ( SUSE ): 8.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N /S:C/C:H/I:H/A:H o CVE-2026-43500 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/ S:U/C:H/I:H/A:H o CVE-2026-43500 ( NVD ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/ S:U/C:H/I:H/A:H o CVE-2026-46300 ( SUSE ): 8.6 CVSS:4.0/AV:L/AC:L/AT:N/PR:N /UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N o CVE-2026-46300 ( SUSE ): 8.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N /S:C/C:H/I:H/A:H o CVE-2026-46333 ( SUSE ): 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N /S:U/C:H/I:H/A:H Affected o openSUSE Leap 15.5 Products: o SUSE Linux Enterprise Micro 5.5 An update that solves five vulnerabilities can now be installed. Description: The SUSE Linux Enterprise 15 SP5 RT kernel was updated to fix various security issues The following security issues were fixed: o CVE-2025-54518: x86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache (bsc#1264013). o CVE-2026-46300: net: skbuff: propagate shared-frag marker through pskb_copy () (bsc#1265209). o CVE-2026-43284: xfrm: esp: avoid in-place decrypt on shared skb frags (bsc# 1264449). o CVE-2026-43500: rxrpc: Also unshare DATA/RESPONSE packets when paged frags are present (aka Dirty Frag) (bsc#1264450). o CVE-2026-46333: ptrace: Logic bug in the Linux kernel's __ptrace_may_access () function (bsc#1265308). The following non security issues were fixed: o io-wq: check that the predecessor is hashed in io_wq_remove_pending() (git-fixes). Special Instructions and Notes: o Please reboot the system after installing this update. 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 openSUSE Leap 15.5 zypper in -t patch SUSE-2026-1899=1 o SUSE Linux Enterprise Micro 5.5 zypper in -t patch SUSE-SLE-Micro-5.5-2026-1899=1 Package List: o openSUSE Leap 15.5 (noarch) kernel-source-rt-5.14.21-150500.13.137.1 kernel-devel-rt-5.14.21-150500.13.137.1 o openSUSE Leap 15.5 (x86_64) kernel-rt-extra-5.14.21-150500.13.137.1 kernel-rt_debug-debuginfo-5.14.21-150500.13.137.1 kernel-rt-extra-debuginfo-5.14.21-150500.13.137.1 kernel-rt_debug-debugsource-5.14.21-150500.13.137.1 kernel-rt-livepatch-devel-5.14.21-150500.13.137.1 kernel-rt_debug-devel-5.14.21-150500.13.137.1 kselftests-kmp-rt-debuginfo-5.14.21-150500.13.137.1 kernel-rt-debugsource-5.14.21-150500.13.137.1 kernel-rt-optional-debuginfo-5.14.21-150500.13.137.1 kernel-rt-optional-5.14.21-150500.13.137.1 kernel-rt-vdso-debuginfo-5.14.21-150500.13.137.1 dlm-kmp-rt-debuginfo-5.14.21-150500.13.137.1 kernel-rt_debug-vdso-debuginfo-5.14.21-150500.13.137.1 kernel-rt-devel-5.14.21-150500.13.137.1 ocfs2-kmp-rt-debuginfo-5.14.21-150500.13.137.1 ocfs2-kmp-rt-5.14.21-150500.13.137.1 kernel-rt-vdso-5.14.21-150500.13.137.1 kernel-rt-livepatch-5.14.21-150500.13.137.1 gfs2-kmp-rt-5.14.21-150500.13.137.1 kernel-rt-devel-debuginfo-5.14.21-150500.13.137.1 kernel-rt_debug-vdso-5.14.21-150500.13.137.1 kernel-syms-rt-5.14.21-150500.13.137.1 kernel-rt-debuginfo-5.14.21-150500.13.137.1 kernel-rt_debug-devel-debuginfo-5.14.21-150500.13.137.1 gfs2-kmp-rt-debuginfo-5.14.21-150500.13.137.1 reiserfs-kmp-rt-debuginfo-5.14.21-150500.13.137.1 reiserfs-kmp-rt-5.14.21-150500.13.137.1 cluster-md-kmp-rt-5.14.21-150500.13.137.1 cluster-md-kmp-rt-debuginfo-5.14.21-150500.13.137.1 dlm-kmp-rt-5.14.21-150500.13.137.1 kselftests-kmp-rt-5.14.21-150500.13.137.1 o openSUSE Leap 15.5 (nosrc x86_64) kernel-rt_debug-5.14.21-150500.13.137.1 kernel-rt-5.14.21-150500.13.137.1 o SUSE Linux Enterprise Micro 5.5 (noarch) kernel-source-rt-5.14.21-150500.13.137.1 kernel-devel-rt-5.14.21-150500.13.137.1 o SUSE Linux Enterprise Micro 5.5 (nosrc x86_64) kernel-rt-5.14.21-150500.13.137.1 o SUSE Linux Enterprise Micro 5.5 (x86_64) kernel-rt-debuginfo-5.14.21-150500.13.137.1 kernel-rt-debugsource-5.14.21-150500.13.137.1 References: o https://www.suse.com/security/cve/CVE-2025-54518.html o https://www.suse.com/security/cve/CVE-2026-43284.html o https://www.suse.com/security/cve/CVE-2026-43500.html o https://www.suse.com/security/cve/CVE-2026-46300.html o https://www.suse.com/security/cve/CVE-2026-46333.html o https://bugzilla.suse.com/show_bug.cgi?id=1264013 o https://bugzilla.suse.com/show_bug.cgi?id=1264449 o https://bugzilla.suse.com/show_bug.cgi?id=1264450 o https://bugzilla.suse.com/show_bug.cgi?id=1265209 o https://bugzilla.suse.com/show_bug.cgi?id=1265308 - --------------------------END INCLUDED TEXT---------------------- You have received this e-mail bulletin as a result of your organisation's registration with AUSCERT. 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