ESB-2026.5436 — Vulnetix

ESB-2026.5436 PUBLISHED CVSS 8.800000190734863 HIGH

=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2026.5436 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 CVE-2026-43500 Original Bulletin: https://www.suse.com/support/update/announcement/2026/suse-su-202621684-1 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-2026:21684-1 Release Date: 2026-05-15T15:50:45Z Rating: important o bsc#1264013 References: o bsc#1264450 o bsc#1265209 o CVE-2025-54518 Cross-References: o CVE-2026-43500 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/ 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-2026-43500 ( SUSE ): 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 ( 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 Affected o SUSE Linux Micro 6.0 Products: An update that solves three vulnerabilities can now be installed. Description: The SUSE Linux Enterprise Micro 6.0 and Micro 6.1 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-2026-43500: rxrpc: unshare DATA/RESPONSE packets when paged frags are present (bsc#1264450). The following non security issues were fixed: o config: s390x/ppc64le: disable unsupported CONFIG_AFS_FS and CONFIG_AF_RXRPC (bsc#1264450). 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 6.0 zypper in -t patch SUSE-SLE-Micro-6.0-kernel-427=1 Package List: o SUSE Linux Micro 6.0 (noarch) kernel-source-rt-6.4.0-45.1 kernel-devel-rt-6.4.0-45.1 o SUSE Linux Micro 6.0 (nosrc x86_64) kernel-rt-6.4.0-45.1 o SUSE Linux Micro 6.0 (x86_64) kernel-rt-debugsource-6.4.0-45.1 kernel-rt-livepatch-6.4.0-45.1 kernel-rt-debuginfo-6.4.0-45.1 References: o https://www.suse.com/security/cve/CVE-2025-54518.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://bugzilla.suse.com/show_bug.cgi?id=1264013 o https://bugzilla.suse.com/show_bug.cgi?id=1264450 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. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AUSCERT's members. As AUSCERT did not write the document quoted above, AUSCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AUSCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://portal.auscert.org.au/bulletins/ =========================================================================== AUSCERT The University of Queensland, Brisbane QLD 4072 Australia e: auscert@auscert.org.au t: +61 (0)7 3365 4417 Allies in Cyber Security ===========================================================================

Risk Scores

CVSS v3.1

8.800000190734863

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected Products

Vendor	Product	Versions
SUSE	Linux Kernel

Timeline

May 20, 2026 CVE Published

References

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