KVM: arm64: Correctly cap TLBI Range to the architural limit (CVE-2026-89911) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-89911

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

Answer in brief

CVE-2026-89911 records a Unknown severity vulnerability in KVM: arm64: Correctly cap TLBI Range to the architural limit. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 16, 2026Updated Sep 16, 2026Source checked Sep 16, 2026First seen by HOL Sep 16, 2026Material review Sep 16, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=4ffa72ad8f37e73bbb6c0baa88557bcb4fd39929 <566b1f08d983615f731cc693f2ad59db302c6b57 \|\| >=4ffa72ad8f37e73bbb6c0baa88557bcb4fd39929 <2de38f0448b45d27eba984fc0d9edb7a138972c2 \|\| >=4ffa72ad8f37e73bbb6c0baa88557bcb4fd39929 <69a598288195947a1662b53de702eb6976af96b7	566b1f08d983615f731cc693f2ad59db302c6b57, 2de38f0448b45d27eba984fc0d9edb7a138972c2, 69a598288195947a1662b53de702eb6976af96b7
Linux/Linuxgeneric	6.16	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 566b1f08d983615f731cc693f2ad59db302c6b57 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 16, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.