{ "cveId": "CVE-2026-89918", "url": "https://patchblox.com/security/cve/CVE-2026-89918", "summary": "CVE-2026-89918 is fixed in 20 products on 1 platform, first by DEBIAN-CVE-2026-89918, released September 23, 2026. It is not reported as exploited. Patch Radar priority: Urgent.", "title": "KVM: arm64: Correctly handle end of VA space TLBI invalidation", "description": "In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Correctly handle end of VA space TLBI invalidation Our TLB invalidation by VA code is based on comparing two ranges, one defined by the TLB, and one defined by the TLBI instruction. Each range is defined by a start and a size. However, the way the comparison is done doesn\u0027t account for address rollover, as it compares an address with (base \u002B size). This works nicely until this expression represent the last page/block in the TTBR1 VA space, as the result is a big fat 0. And a failed TLB invalidation. Rewrite the comparison in a way that is immune to the address rollover (making the end address inclusive instead of exclusive), and move this into a common helper that is used by both VA and IPA invalidations, as suggested by Hyunwoo Kim (although the IPA version didn\u0027t suffer from this particular problem, obviously).", "published": "2026-09-16T11:17:00Z", "severity": "critical", "cvss": 9.3, "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H", "epss": 0.00194, "epssPercentile": 0.091, "priority": "Urgent", "priorityTier": 2, "exploited": false, "vendorExploited": false, "disclosed": false, "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-89918", "fixes": [ { "platform": "linux", "product": "bpftool6.18", "release": "amzn 2023", "fixedVersion": "1:6.18.51-120.162.amzn2023", "fix": "ALAS2023-2026-3187", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3187", "released": "2026-11-07T01:06:52Z" }, { "platform": "linux", "product": "bpftool6.18-debuginfo", "release": "amzn 2023", "fixedVersion": "1:6.18.51-120.162.amzn2023", "fix": "ALAS2023-2026-3187", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3187", "released": "2026-11-07T01:06:52Z" }, { "platform": "linux", "product": "kernel-livepatch-6.18.51-120.162", "release": "amzn 2023", "fixedVersion": "1:1.0-0.amzn2023", "fix": "ALAS2023-2026-3187", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3187", "released": "2026-11-07T01:06:52Z" }, { "platform": "linux", "product": "kernel6.18", "release": "amzn 2023", "fixedVersion": "1:6.18.51-120.162.amzn2023", "fix": "ALAS2023-2026-3187", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3187", "released": "2026-11-07T01:06:52Z" }, { "platform": "linux", "product": "kernel6.18-debuginfo", "release": "amzn 2023", "fixedVersion": "1:6.18.51-120.162.amzn2023", "fix": "ALAS2023-2026-3187", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3187", "released": "2026-11-07T01:06:52Z" }, { "platform": "linux", "product": "kernel6.18-debuginfo-common-aarch64", "release": "amzn 2023", "fixedVersion": "1:6.18.51-120.162.amzn2023", "fix": "ALAS2023-2026-3187", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3187", "released": "2026-11-07T01:06:52Z" }, { "platform": "linux", "product": "kernel6.18-debuginfo-common-x86_64", "release": "amzn 2023", "fixedVersion": "1:6.18.51-120.162.amzn2023", "fix": "ALAS2023-2026-3187", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3187", "released": "2026-11-07T01:06:52Z" }, { "platform": "linux", "product": "kernel6.18-devel", "release": "amzn 2023", "fixedVersion": "1:6.18.51-120.162.amzn2023", "fix": "ALAS2023-2026-3187", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3187", "released": "2026-11-07T01:06:52Z" }, { "platform": "linux", "product": "kernel6.18-headers", "release": "amzn 2023", "fixedVersion": "1:6.18.51-120.162.amzn2023", "fix": "ALAS2023-2026-3187", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3187", "released": "2026-11-07T01:06:52Z" }, { "platform": "linux", "product": "kernel6.18-modules-extra", "release": "amzn 2023", "fixedVersion": "1:6.18.51-120.162.amzn2023", "fix": "ALAS2023-2026-3187", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3187", "released": "2026-11-07T01:06:52Z" }, { "platform": "linux", "product": "kernel6.18-modules-extra-common", "release": "amzn 2023", "fixedVersion": "1:6.18.51-120.162.amzn2023", "fix": "ALAS2023-2026-3187", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3187", "released": "2026-11-07T01:06:52Z" }, { "platform": "linux", "product": "kernel6.18-tools", "release": "amzn 2023", "fixedVersion": "1:6.18.51-120.162.amzn2023", "fix": "ALAS2023-2026-3187", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3187", "released": "2026-11-07T01:06:52Z" }, { "platform": "linux", "product": "kernel6.18-tools-debuginfo", "release": "amzn 2023", "fixedVersion": "1:6.18.51-120.162.amzn2023", "fix": "ALAS2023-2026-3187", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3187", "released": "2026-11-07T01:06:52Z" }, { "platform": "linux", "product": "kernel6.18-tools-devel", "release": "amzn 2023", "fixedVersion": "1:6.18.51-120.162.amzn2023", "fix": "ALAS2023-2026-3187", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3187", "released": "2026-11-07T01:06:52Z" }, { "platform": "linux", "product": "linux", "release": "Debian 14", "fixedVersion": "7.2.6-1", "fix": "DEBIAN-CVE-2026-89918", "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-89918", "released": "2026-09-23T19:19:02Z" }, { "platform": "linux", "product": "microvm-kernel6.18", "release": "amzn 2023", "fixedVersion": "1:6.18.51-120.162.amzn2023", "fix": "ALAS2023-2026-3187", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3187", "released": "2026-11-07T01:06:52Z" }, { "platform": "linux", "product": "perf6.18", "release": "amzn 2023", "fixedVersion": "1:6.18.51-120.162.amzn2023", "fix": "ALAS2023-2026-3187", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3187", "released": "2026-11-07T01:06:52Z" }, { "platform": "linux", "product": "perf6.18-debuginfo", "release": "amzn 2023", "fixedVersion": "1:6.18.51-120.162.amzn2023", "fix": "ALAS2023-2026-3187", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3187", "released": "2026-11-07T01:06:52Z" }, { "platform": "linux", "product": "python3-perf6.18", "release": "amzn 2023", "fixedVersion": "1:6.18.51-120.162.amzn2023", "fix": "ALAS2023-2026-3187", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3187", "released": "2026-11-07T01:06:52Z" }, { "platform": "linux", "product": "python3-perf6.18-debuginfo", "release": "amzn 2023", "fixedVersion": "1:6.18.51-120.162.amzn2023", "fix": "ALAS2023-2026-3187", "url": "https://patchblox.com/security/fix/linux/alas2023-2026-3187", "released": "2026-11-07T01:06:52Z" } ], "noFixYet": [], "dataAsOf": "2026-11-08T06:59:42Z", "attribution": { "text": "Data: Patchblox Patch Radar", "url": "https://patchblox.com/security/patch-radar", "terms": "https://patchblox.com/security/patch-radar/use-the-data" } }