ESB-2026.5444

=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2026.5444 Security update for the Linux Kernel 20 May 2026 =========================================================================== AUSCERT Security Bulletin Summary --------------------------------- Product: Linux Kernel Publisher: SUSE Operating System: SUSE Resolution: Patch/Upgrade CVE Names: CVE-2026-46300 CVE-2025-54518 Original Bulletin: https://www.suse.com/support/update/announcement/2026/suse-su-202621645-1 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: 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% (2nd)* CVE-2025-54518 2026-05-19 * Not all EPSS found when published - --------------------------BEGIN INCLUDED TEXT-------------------- Security update for the Linux Kernel Announcement ID: SUSE-SU-2026:21645-1 Release Date: 2026-05-15T12:22:55Z Rating: important o bsc#1264013 References: o bsc#1265209 o CVE-2025-54518 Cross-References: o CVE-2026-46300 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/ CVSS scores: 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-2026-46300 ( 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 Affected o SUSE Linux Micro 6.0 Products: o SUSE Linux Micro Extras 6.0 An update that solves two vulnerabilities can now be installed. Description: The SUSE Linux Enterprise Micro 6.0 and Micro 6.1 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). The following non security issue was 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 SUSE Linux Micro Extras 6.0 zypper in -t patch SUSE-SLE-Micro-Extras-6.0-kernel-429=1 Package List: o SUSE Linux Micro Extras 6.0 (nosrc) kernel-64kb-6.4.0-44.1 kernel-default-6.4.0-44.1 o SUSE Linux Micro Extras 6.0 (aarch64) kernel-64kb-devel-6.4.0-44.1 kernel-64kb-debugsource-6.4.0-44.1 o SUSE Linux Micro Extras 6.0 (aarch64 s390x x86_64) kernel-default-debugsource-6.4.0-44.1 kernel-default-devel-6.4.0-44.1 kernel-syms-6.4.0-44.1 kernel-obs-build-6.4.0-44.1 kernel-obs-build-debugsource-6.4.0-44.1 o SUSE Linux Micro Extras 6.0 (x86_64) kernel-default-devel-debuginfo-6.4.0-44.1 References: o https://www.suse.com/security/cve/CVE-2025-54518.html o https://www.suse.com/security/cve/CVE-2026-46300.html o https://bugzilla.suse.com/show_bug.cgi?id=1264013 o https://bugzilla.suse.com/show_bug.cgi?id=1265209 - --------------------------END INCLUDED TEXT---------------------- You have received this e-mail bulletin as a result of your organisation's registration with AUSCERT. 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