Answer in brief
CVE-2026-63851 records a Unknown severity vulnerability in drm/amdgpu/vcn: set no_user_fence for VCN v4.0.5 enc ring. 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 | >=547aad32edac17a3ec4989d8aad2426d0cbeb590 <75091030f07b7957cc0646cd52e2d9d15f611483 || >=547aad32edac17a3ec4989d8aad2426d0cbeb590 <6d9a98c5ed65ba92a09e4ca5a5f6941448145529 || >=547aad32edac17a3ec4989d8aad2426d0cbeb590 <7f23b5c420b9f68a210c29c5123bace670aa8cc9 || >=547aad32edac17a3ec4989d8aad2426d0cbeb590 <589a254bf3e88204c8402b9cbccd5e23a0af990f | 75091030f07b7957cc0646cd52e2d9d15f611483, 6d9a98c5ed65ba92a09e4ca5a5f6941448145529, 7f23b5c420b9f68a210c29c5123bace670aa8cc9, 589a254bf3e88204c8402b9cbccd5e23a0af990f |
| Linux/Linuxgeneric | 6.7 | 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 v4.0.5 enc ring VCN encoder and decoder rings do not support 64-bit user fence writes, reject CS submissions with user fences. (cherry picked from commit 084d94ac93707bdda07efb5cee786f632de4219b)
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-63851 records a Unknown severity vulnerability in drm/amdgpu/vcn: set no_user_fence for VCN v4.0.5 enc ring. 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 | >=547aad32edac17a3ec4989d8aad2426d0cbeb590 <75091030f07b7957cc0646cd52e2d9d15f611483 || >=547aad32edac17a3ec4989d8aad2426d0cbeb590 <6d9a98c5ed65ba92a09e4ca5a5f6941448145529 || >=547aad32edac17a3ec4989d8aad2426d0cbeb590 <7f23b5c420b9f68a210c29c5123bace670aa8cc9 || >=547aad32edac17a3ec4989d8aad2426d0cbeb590 <589a254bf3e88204c8402b9cbccd5e23a0af990f | 75091030f07b7957cc0646cd52e2d9d15f611483, 6d9a98c5ed65ba92a09e4ca5a5f6941448145529, 7f23b5c420b9f68a210c29c5123bace670aa8cc9, 589a254bf3e88204c8402b9cbccd5e23a0af990f |
| Linux/Linuxgeneric | 6.7 | 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 v4.0.5 enc ring VCN encoder and decoder rings do not support 64-bit user fence writes, reject CS submissions with user fences. (cherry picked from commit 084d94ac93707bdda07efb5cee786f632de4219b)
Quoted source text, attributed separately from HOL analysis.