Answer in brief
CVE-2026-63854 records a Unknown severity 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). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
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.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=cf14826cdfb5c9fe10f98210d040b9d7486c381d <e74fc9c72c1ba78d0de0b849f5929c3b39a8e20c || >=cf14826cdfb5c9fe10f98210d040b9d7486c381d <26c4f38529ac78930c9c4713e16ebc5b689bb0a3 || >=cf14826cdfb5c9fe10f98210d040b9d7486c381d <2d6525e7b2504f5bbfe9417cddc1e8da858791dd || >=cf14826cdfb5c9fe10f98210d040b9d7486c381d <b076e45e6f757a2829e80d0144c1b5f201bee5af || >=cf14826cdfb5c9fe10f98210d040b9d7486c381d <f1e5a6660d7cbf006079126d9babbf0ccf538c6b | e74fc9c72c1ba78d0de0b849f5929c3b39a8e20c, 26c4f38529ac78930c9c4713e16ebc5b689bb0a3, 2d6525e7b2504f5bbfe9417cddc1e8da858791dd, b076e45e6f757a2829e80d0144c1b5f201bee5af, f1e5a6660d7cbf006079126d9babbf0ccf538c6b |
| Linux/Linuxgeneric | 5.9 | Not reported |
Published upstream
Jul 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Answer in brief
CVE-2026-63854 records a Unknown severity 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). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
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.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=cf14826cdfb5c9fe10f98210d040b9d7486c381d <e74fc9c72c1ba78d0de0b849f5929c3b39a8e20c || >=cf14826cdfb5c9fe10f98210d040b9d7486c381d <26c4f38529ac78930c9c4713e16ebc5b689bb0a3 || >=cf14826cdfb5c9fe10f98210d040b9d7486c381d <2d6525e7b2504f5bbfe9417cddc1e8da858791dd || >=cf14826cdfb5c9fe10f98210d040b9d7486c381d <b076e45e6f757a2829e80d0144c1b5f201bee5af || >=cf14826cdfb5c9fe10f98210d040b9d7486c381d <f1e5a6660d7cbf006079126d9babbf0ccf538c6b | e74fc9c72c1ba78d0de0b849f5929c3b39a8e20c, 26c4f38529ac78930c9c4713e16ebc5b689bb0a3, 2d6525e7b2504f5bbfe9417cddc1e8da858791dd, b076e45e6f757a2829e80d0144c1b5f201bee5af, f1e5a6660d7cbf006079126d9babbf0ccf538c6b |
| Linux/Linuxgeneric | 5.9 | Not reported |
Published upstream
Jul 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.