KVM: nVMX: Ensure KVM_REQ_GET_NESTED_STATE_PAGES is cleared on VM-Exit (CVE-2026-89931) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-89931

KVM: nVMX: Ensure KVM_REQ_GET_NESTED_STATE_PAGES is cleared on VM-Exit

Answer in brief

CVE-2026-89931 records a Unknown severity vulnerability in KVM: nVMX: Ensure KVM_REQ_GET_NESTED_STATE_PAGES is cleared on VM-Exit. 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	>=b4f69df0f65e97fec439130a0d0a8b9c7cc02df2 <ae190f2439ca30067927077bf570d4c5edf07a0f \|\| >=b4f69df0f65e97fec439130a0d0a8b9c7cc02df2 <674a3244f07f323f21a106a7bdcaebb6db6a5058 \|\| >=b4f69df0f65e97fec439130a0d0a8b9c7cc02df2 <bbec4adc2f340d85f4a77a9ddcddaa6b1f4639c5 \|\| >=b4f69df0f65e97fec439130a0d0a8b9c7cc02df2 <11722439fb206c88e6f31be54173efa9880b4ccb	ae190f2439ca30067927077bf570d4c5edf07a0f, 674a3244f07f323f21a106a7bdcaebb6db6a5058, bbec4adc2f340d85f4a77a9ddcddaa6b1f4639c5, 11722439fb206c88e6f31be54173efa9880b4ccb
Linux/Linuxgeneric	6.8	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to ae190f2439ca30067927077bf570d4c5edf07a0f 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: nVMX: Ensure KVM_REQ_GET_NESTED_STATE_PAGES is cleared on VM-Exit Always check and clear KVM_REQ_GET_NESTED_STATE_PAGES when emulating a nested VM-Exit to ensure the request is cleared, even when KVM was built with CONFIG_KVM_HYPERV=n, as KVM subtly relies on the "check" to clear the flag and thus avoid double-mapping the vmcs12 pages, e.g. if KVM manages to bail from VM-Enter without processing the request, and then emulates VMLAUNCH or VMRESUME.

Quoted source text, attributed separately from HOL analysis.