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  4. CVE 2026 63854 drmamdgpuvcn set nouserfence for vcn v30 encdec
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Back to active CVEs
High · CVSS 7.8CVE-2026-63854

drm/amdgpu/vcn: set no_user_fence for VCN v3.0 enc/dec ringsCVE-2026-63854

Answer in brief

CVE-2026-63854 records a High severity (CVSS 7.8) vulnerability in drm/amdgpu/vcn: set no_user_fence for VCN v3.0 enc/dec rings. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), 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 Jul 19, 2026Updated Oct 30, 2026Source checked Nov 4, 2026First seen by HOL Aug 5, 2026Material review Oct 30, 2026
Upstream Advisory

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-20, NVD-CWE-noinfo
Source
CVE List V5
Source checked
Nov 4, 2026
References
6 linked sources
Open source record

Key facts

Risk
High · CVSS 7.8
Exploitation
Not marked as known exploited
Affected software
5 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 7.8. 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), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
ProductAffected versionsFixed versions
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*Not reportedNot reported
Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Linux/Linuxgeneric>=cf14826cdfb5c9fe10f98210d040b9d7486c381d <e74fc9c72c1ba78d0de0b849f5929c3b39a8e20c || >=cf14826cdfb5c9fe10f98210d040b9d7486c381d <26c4f38529ac78930c9c4713e16ebc5b689bb0a3 || >=cf14826cdfb5c9fe10f98210d040b9d7486c381d <2d6525e7b2504f5bbfe9417cddc1e8da858791dd || >=cf14826cdfb5c9fe10f98210d040b9d7486c381d <b076e45e6f757a2829e80d0144c1b5f201bee5af || >=cf14826cdfb5c9fe10f98210d040b9d7486c381d <f1e5a6660d7cbf006079126d9babbf0ccf538c6be74fc9c72c1ba78d0de0b849f5929c3b39a8e20c, 26c4f38529ac78930c9c4713e16ebc5b689bb0a3, 2d6525e7b2504f5bbfe9417cddc1e8da858791dd, b076e45e6f757a2829e80d0144c1b5f201bee5af, f1e5a6660d7cbf006079126d9babbf0ccf538c6b
Linux/Linuxgeneric5.9Not reported
Linux/Linuxgeneric>=cf14826cdfb5c9fe10f98210d040b9d7486c381d <e3d339b0d9051d49eb9c78459091bba4fb525100 || >=cf14826cdfb5c9fe10f98210d040b9d7486c381d <e74fc9c72c1ba78d0de0b849f5929c3b39a8e20c || >=cf14826cdfb5c9fe10f98210d040b9d7486c381d <26c4f38529ac78930c9c4713e16ebc5b689bb0a3 || >=cf14826cdfb5c9fe10f98210d040b9d7486c381d <2d6525e7b2504f5bbfe9417cddc1e8da858791dd || >=cf14826cdfb5c9fe10f98210d040b9d7486c381d <b076e45e6f757a2829e80d0144c1b5f201bee5af || >=cf14826cdfb5c9fe10f98210d040b9d7486c381d <f1e5a6660d7cbf006079126d9babbf0ccf538c6be3d339b0d9051d49eb9c78459091bba4fb525100, e74fc9c72c1ba78d0de0b849f5929c3b39a8e20c, 26c4f38529ac78930c9c4713e16ebc5b689bb0a3, 2d6525e7b2504f5bbfe9417cddc1e8da858791dd, b076e45e6f757a2829e80d0144c1b5f201bee5af, f1e5a6660d7cbf006079126d9babbf0ccf538c6b

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux, Linux/Linux.
  2. 2Review the reported fix. Update Linux/Linux to e74fc9c72c1ba78d0de0b849f5929c3b39a8e20c; Linux/Linux to e3d339b0d9051d49eb9c78459091bba4fb525100 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Jul 19, 2026

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

  2. Source modified

    Oct 30, 2026

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

  3. First seen by HOL

    Aug 5, 2026

Sources and claim methodology

  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • 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: drm/amdgpu/vcn: set no_user_fence for VCN v3.0 enc/dec rings VCN encoder and decoder rings do not support 64-bit user fence writes, reject CS submissions with user fences. (cherry picked from commit 663bed3c7b8b9a7624b0d95d300ddae034ad0614)

Quoted source text, attributed separately from HOL analysis.

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