# CVE-2026-89537: SUNRPC: Reject short RFC 4121 MIC tokens in gss_krb5_verify_mic_v2 CVE-2026-89537 is fixed in 29 products on 1 platform, first by DEBIAN-CVE-2026-89537, released September 23, 2026. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2026-89537 - Priority: High - CVSS: 9.1 (Moderate) - EPSS: 0.0073 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Sep 11, 2026 - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-89537 ## Description SUNRPC: Reject short RFC 4121 MIC tokens in gss_krb5_verify_mic_v2 (bsc#1280713). ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | bpftool6.12 amzn 2023 | 1:6.12.114-139.210.amzn2023 | [ALAS2023-2026-3402](https://patchblox.com/security/data/fix/linux/alas2023-2026-3402.md) | Nov 10, 2026 | | Linux | bpftool6.12-debuginfo amzn 2023 | 1:6.12.114-139.210.amzn2023 | [ALAS2023-2026-3402](https://patchblox.com/security/data/fix/linux/alas2023-2026-3402.md) | Nov 10, 2026 | | Linux | kernel-64kb sles 15.7 | 6.4.0-150700.53.90.1 | [SUSE-SU-2026:5091-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-5091-1.md) | Nov 7, 2026 | | Linux | kernel-azure sles 15.7 | 6.4.0-150700.53.90.1 | [SUSE-SU-2026:5091-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-5091-1.md) | Nov 7, 2026 | | Linux | kernel-default sles 15.7 | 6.4.0-150700.53.90.1 | [SUSE-SU-2026:5091-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-5091-1.md) | Nov 7, 2026 | | Linux | kernel-default-base sles 15.7 | 6.4.0-150700.53.90.1.150700.17.51.1 | [SUSE-SU-2026:5091-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-5091-1.md) | Nov 7, 2026 | | Linux | kernel-docs sles 15.7 | 6.4.0-150700.53.90.1 | [SUSE-SU-2026:5091-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-5091-1.md) | Nov 7, 2026 | | Linux | kernel-livepatch-6.12.114-139.210 amzn 2023 | 1:1.0-0.amzn2023 | [ALAS2023-2026-3402](https://patchblox.com/security/data/fix/linux/alas2023-2026-3402.md) | Nov 10, 2026 | | Linux | kernel-livepatch-SLE15-SP7_Update_24 sles 15.7 | 1-150700.15.3.1 | [SUSE-SU-2026:5091-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-5091-1.md) | Nov 7, 2026 | | Linux | kernel-obs-build sles 15.7 | 6.4.0-150700.53.90.1 | [SUSE-SU-2026:5091-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-5091-1.md) | Nov 7, 2026 | | Linux | kernel-source sles 15.7 | 6.4.0-150700.53.90.1 | [SUSE-SU-2026:5091-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-5091-1.md) | Nov 7, 2026 | | Linux | kernel-syms sles 15.7 | 6.4.0-150700.53.90.1 | [SUSE-SU-2026:5091-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-5091-1.md) | Nov 7, 2026 | | Linux | kernel-zfcpdump sles 15.7 | 6.4.0-150700.53.90.1 | [SUSE-SU-2026:5091-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-5091-1.md) | Nov 7, 2026 | | Linux | kernel6.12 amzn 2023 | 1:6.12.114-139.210.amzn2023 | [ALAS2023-2026-3402](https://patchblox.com/security/data/fix/linux/alas2023-2026-3402.md) | Nov 10, 2026 | | Linux | kernel6.12-debuginfo amzn 2023 | 1:6.12.114-139.210.amzn2023 | [ALAS2023-2026-3402](https://patchblox.com/security/data/fix/linux/alas2023-2026-3402.md) | Nov 10, 2026 | | Linux | kernel6.12-debuginfo-common-aarch64 amzn 2023 | 1:6.12.114-139.210.amzn2023 | [ALAS2023-2026-3402](https://patchblox.com/security/data/fix/linux/alas2023-2026-3402.md) | Nov 10, 2026 | | Linux | kernel6.12-debuginfo-common-x86_64 amzn 2023 | 1:6.12.114-139.210.amzn2023 | [ALAS2023-2026-3402](https://patchblox.com/security/data/fix/linux/alas2023-2026-3402.md) | Nov 10, 2026 | | Linux | kernel6.12-devel amzn 2023 | 1:6.12.114-139.210.amzn2023 | [ALAS2023-2026-3402](https://patchblox.com/security/data/fix/linux/alas2023-2026-3402.md) | Nov 10, 2026 | | Linux | kernel6.12-headers amzn 2023 | 1:6.12.114-139.210.amzn2023 | [ALAS2023-2026-3402](https://patchblox.com/security/data/fix/linux/alas2023-2026-3402.md) | Nov 10, 2026 | | Linux | kernel6.12-modules-extra amzn 2023 | 1:6.12.114-139.210.amzn2023 | [ALAS2023-2026-3402](https://patchblox.com/security/data/fix/linux/alas2023-2026-3402.md) | Nov 10, 2026 | | Linux | kernel6.12-modules-extra-common amzn 2023 | 1:6.12.114-139.210.amzn2023 | [ALAS2023-2026-3402](https://patchblox.com/security/data/fix/linux/alas2023-2026-3402.md) | Nov 10, 2026 | | Linux | kernel6.12-tools amzn 2023 | 1:6.12.114-139.210.amzn2023 | [ALAS2023-2026-3402](https://patchblox.com/security/data/fix/linux/alas2023-2026-3402.md) | Nov 10, 2026 | | Linux | kernel6.12-tools-debuginfo amzn 2023 | 1:6.12.114-139.210.amzn2023 | [ALAS2023-2026-3402](https://patchblox.com/security/data/fix/linux/alas2023-2026-3402.md) | Nov 10, 2026 | | Linux | kernel6.12-tools-devel amzn 2023 | 1:6.12.114-139.210.amzn2023 | [ALAS2023-2026-3402](https://patchblox.com/security/data/fix/linux/alas2023-2026-3402.md) | Nov 10, 2026 | | Linux | linux Debian 13.5 (trixie) | 6.12.115-2 | [DEBIAN-CVE-2026-89537](https://patchblox.com/security/data/fix/linux/debian-cve-2026-89537.md) | Sep 23, 2026 | | Linux | linux Debian 14 | 7.2.6-1 | [DEBIAN-CVE-2026-89537](https://patchblox.com/security/data/fix/linux/debian-cve-2026-89537.md) | Sep 23, 2026 | | Linux | perf6.12 amzn 2023 | 1:6.12.114-139.210.amzn2023 | [ALAS2023-2026-3402](https://patchblox.com/security/data/fix/linux/alas2023-2026-3402.md) | Nov 10, 2026 | | Linux | perf6.12-debuginfo amzn 2023 | 1:6.12.114-139.210.amzn2023 | [ALAS2023-2026-3402](https://patchblox.com/security/data/fix/linux/alas2023-2026-3402.md) | Nov 10, 2026 | | Linux | python3-perf6.12 amzn 2023 | 1:6.12.114-139.210.amzn2023 | [ALAS2023-2026-3402](https://patchblox.com/security/data/fix/linux/alas2023-2026-3402.md) | Nov 10, 2026 | | Linux | python3-perf6.12-debuginfo amzn 2023 | 1:6.12.114-139.210.amzn2023 | [ALAS2023-2026-3402](https://patchblox.com/security/data/fix/linux/alas2023-2026-3402.md) | Nov 10, 2026 | --- Data as of 2026-11-11T07:45:43Z UTC. 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