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Back to active CVEs
Unknown severity · Source severity not reportedCVE-2025-40065

RISC-V: KVM: Write hgatp register with valid mode bitsCVE-2025-40065

Answer in brief

CVE-2025-40065 records a Unknown severity vulnerability in RISC-V: KVM: Write hgatp register with valid mode bits. 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 Oct 28, 2025Updated Oct 21, 2026Source checked Oct 21, 2026First seen by HOL Oct 21, 2026Material review Oct 21, 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
PackageAffected rangeFixed version
Linux/Linuxgeneric>=fd7bb4a251dfc1da3496bf59a4793937c13e8c1f <8b6e327736db013b9e385c3f6f9f0b04ddf26e43 || >=fd7bb4a251dfc1da3496bf59a4793937c13e8c1f <5cba8ae00279296a586d0596443109d601b1d116 || >=fd7bb4a251dfc1da3496bf59a4793937c13e8c1f <d00b61cd37f4c183ce0edbc9f8ccf6d5430ea357 || >=fd7bb4a251dfc1da3496bf59a4793937c13e8c1f <2b351e3d04be9e1533f26c3464f1e44a5beace308b6e327736db013b9e385c3f6f9f0b04ddf26e43, 5cba8ae00279296a586d0596443109d601b1d116, d00b61cd37f4c183ce0edbc9f8ccf6d5430ea357, 2b351e3d04be9e1533f26c3464f1e44a5beace30
Linux/Linuxgeneric5.16Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
  2. 2Review the reported fix. Update Linux/Linux to 8b6e327736db013b9e385c3f6f9f0b04ddf26e43 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 28, 2025

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 21, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 21, 2026

Sources and claim methodology

  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
Upstream source description

In the Linux kernel, the following vulnerability has been resolved: RISC-V: KVM: Write hgatp register with valid mode bits According to the RISC-V Privileged Architecture Spec, when MODE=Bare is selected,software must write zero to the remaining fields of hgatp. We have detected the valid mode supported by the HW before, So using a valid mode to detect how many vmid bits are supported.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
Not reported
Source
CVE List V5
Source checked
Oct 21, 2026
References
4 linked sources
Open source record