CVE-2026-89914

KVM: arm64: Sign-extend VA for range-based TLBI invalidation

CVE-2026-89914 is fixed in 20 products on 1 platform, first by DEBIAN-CVE-2026-89914, released September 23, 2026. It is not reported as exploited. Patch Radar priority: Urgent.

Urgent

CVSS

9.3

critical

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0019

9th percentile

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Sign-extend VA for range-based TLBI invalidation When the decode_range_tlbi() helper was moved to be used for S1 TLBIs, the required sign extension was omitted. Add it. As a result, special care must be taken to not overflow PA bits when this is used for S2 invalidation.

Where it's fixed

Product	Fixed in	Fix	Released
Linux
bpftool6.18 · amzn 2023	1:6.18.51-120.162.amzn2023	ALAS2023-2026-3187	Nov 7, 2026
bpftool6.18-debuginfo · amzn 2023	1:6.18.51-120.162.amzn2023	ALAS2023-2026-3187	Nov 7, 2026
kernel-livepatch-6.18.51-120.162 · amzn 2023	1:1.0-0.amzn2023	ALAS2023-2026-3187	Nov 7, 2026
kernel6.18 · amzn 2023	1:6.18.51-120.162.amzn2023	ALAS2023-2026-3187	Nov 7, 2026
kernel6.18-debuginfo · amzn 2023	1:6.18.51-120.162.amzn2023	ALAS2023-2026-3187	Nov 7, 2026
kernel6.18-debuginfo-common-aarch64 · amzn 2023	1:6.18.51-120.162.amzn2023	ALAS2023-2026-3187	Nov 7, 2026
kernel6.18-debuginfo-common-x86_64 · amzn 2023	1:6.18.51-120.162.amzn2023	ALAS2023-2026-3187	Nov 7, 2026
kernel6.18-devel · amzn 2023	1:6.18.51-120.162.amzn2023	ALAS2023-2026-3187	Nov 7, 2026
kernel6.18-headers · amzn 2023	1:6.18.51-120.162.amzn2023	ALAS2023-2026-3187	Nov 7, 2026
kernel6.18-modules-extra · amzn 2023	1:6.18.51-120.162.amzn2023	ALAS2023-2026-3187	Nov 7, 2026
kernel6.18-modules-extra-common · amzn 2023	1:6.18.51-120.162.amzn2023	ALAS2023-2026-3187	Nov 7, 2026
kernel6.18-tools · amzn 2023	1:6.18.51-120.162.amzn2023	ALAS2023-2026-3187	Nov 7, 2026
kernel6.18-tools-debuginfo · amzn 2023	1:6.18.51-120.162.amzn2023	ALAS2023-2026-3187	Nov 7, 2026
kernel6.18-tools-devel · amzn 2023	1:6.18.51-120.162.amzn2023	ALAS2023-2026-3187	Nov 7, 2026
linux · Debian 14	7.2.6-1	DEBIAN-CVE-2026-89914	Sep 23, 2026
microvm-kernel6.18 · amzn 2023	1:6.18.51-120.162.amzn2023	ALAS2023-2026-3187	Nov 7, 2026
perf6.18 · amzn 2023	1:6.18.51-120.162.amzn2023	ALAS2023-2026-3187	Nov 7, 2026
perf6.18-debuginfo · amzn 2023	1:6.18.51-120.162.amzn2023	ALAS2023-2026-3187	Nov 7, 2026
python3-perf6.18 · amzn 2023	1:6.18.51-120.162.amzn2023	ALAS2023-2026-3187	Nov 7, 2026
python3-perf6.18-debuginfo · amzn 2023	1:6.18.51-120.162.amzn2023	ALAS2023-2026-3187	Nov 7, 2026

Details

Published
September 16, 2026
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-89914

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