CVE-2026-89911

KVM: arm64: Correctly cap TLBI Range to the architural limit

HIGH
7.9
CVSS Score
Published: September 16, 2026 at 10:32 AM UTC
Updated: October 19, 2026 at 09:18 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH7.9
Exploit prediction
EPSS 0.2%

Description

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Correctly cap TLBI Range to the architural limit TLB Invalidation by Range has a fairly powerful way of encoding pretty large ranges in a small number of bits. This range can be based on an arbitrary VA, which means it is pretty easy for a guest to generate an overflow should the hypervisor be naive enough to add the range to the base... Make sure the range is capped to the limit dictated by the address bit that determines the VA range. For an IPA invalidation, this is further corrected down the line to ignore the upper range.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

4ffa72ad8f37e73bbb6c0baa88557bcb4fd399296.16
Vendor states this is fixed in 2de38f0448b45d27eba984fc0d9edb7a138972c2 (fixed)
Vendor states this is fixed in 566b1f08d983615f731cc693f2ad59db302c6b57 (fixed)
Vendor states this is fixed in 69a598288195947a1662b53de702eb6976af96b7 (fixed)
Vendor states this is fixed in 6.16 (unaffected)
Vendor states this is fixed in 6.18.51 (unaffected)
Vendor states this is fixed in 7.2.5 (unaffected)
Vendor states this is fixed in 7.3 (unaffected)
Vendor states this is fixed in 7.3-rc1 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

CVSS

7.9HIGHLinux
Vector?

Quick Info

StatusRECEIVED

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