Answer in brief
CVE-2026-63852 records a Unknown severity vulnerability in drm/amdgpu/vcn: set no_user_fence for VCN v4.0.3 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 | >=b889ef4ac98837838c38f7b9f72bba2f33ee367d <c12a5d35033c0640c57c10d7111c010c7b9c2c8e || >=b889ef4ac98837838c38f7b9f72bba2f33ee367d <387b7c7667bd5c53549350ddad866d2fcf75a529 || >=b889ef4ac98837838c38f7b9f72bba2f33ee367d <9076a83e5adefd10dc5c967c7b8bde601c4c512a || >=b889ef4ac98837838c38f7b9f72bba2f33ee367d <0177ac6141c8857130cf365369c74dee7b6b1f7f || >=b889ef4ac98837838c38f7b9f72bba2f33ee367d <4532b52b34e4e4310386e6fdf6a643368599f522 | c12a5d35033c0640c57c10d7111c010c7b9c2c8e, 387b7c7667bd5c53549350ddad866d2fcf75a529, 9076a83e5adefd10dc5c967c7b8bde601c4c512a, 0177ac6141c8857130cf365369c74dee7b6b1f7f, 4532b52b34e4e4310386e6fdf6a643368599f522 |
| Linux/Linuxgeneric | 6.5 | 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 v4.0.3 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 ff1a5a125c5a70c328806b9bc01d7d942cf3f9aa)
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-63852 records a Unknown severity vulnerability in drm/amdgpu/vcn: set no_user_fence for VCN v4.0.3 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 | >=b889ef4ac98837838c38f7b9f72bba2f33ee367d <c12a5d35033c0640c57c10d7111c010c7b9c2c8e || >=b889ef4ac98837838c38f7b9f72bba2f33ee367d <387b7c7667bd5c53549350ddad866d2fcf75a529 || >=b889ef4ac98837838c38f7b9f72bba2f33ee367d <9076a83e5adefd10dc5c967c7b8bde601c4c512a || >=b889ef4ac98837838c38f7b9f72bba2f33ee367d <0177ac6141c8857130cf365369c74dee7b6b1f7f || >=b889ef4ac98837838c38f7b9f72bba2f33ee367d <4532b52b34e4e4310386e6fdf6a643368599f522 | c12a5d35033c0640c57c10d7111c010c7b9c2c8e, 387b7c7667bd5c53549350ddad866d2fcf75a529, 9076a83e5adefd10dc5c967c7b8bde601c4c512a, 0177ac6141c8857130cf365369c74dee7b6b1f7f, 4532b52b34e4e4310386e6fdf6a643368599f522 |
| Linux/Linuxgeneric | 6.5 | 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 v4.0.3 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 ff1a5a125c5a70c328806b9bc01d7d942cf3f9aa)
Quoted source text, attributed separately from HOL analysis.