In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/jpeg: set no_user_fence for JPEG v5.3.0 ring JPEG rings do not… (CVE-2026-63840)
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/jpeg: set no_user_fence for JPEG v5.3.0 ring JPEG rings do not support 64-bit user fence writes, reject CS submissions with user fences. (cherry picked from commit 86ac011ae234c03fb872f4945913391ea1d8862e)
AI Analysis
Technical Summary
The Linux kernel AMDGPU JPEG driver had a vulnerability where the JPEG rings did not support 64-bit user fence writes, which could cause issues when command submissions included user fences. The vulnerability was addressed by setting the no_user_fence flag for the JPEG v5.3.0 ring, effectively rejecting submissions with user fences to prevent misuse. This fix was applied via a specific commit (86ac011ae234c03fb872f4945913391ea1d8862e).
Potential Impact
The vulnerability could lead to improper handling of user fence writes in the AMDGPU JPEG driver, potentially causing stability or security issues related to command submission processing. No known exploits in the wild have been reported.
Mitigation Recommendations
An official fix has been applied in the Linux kernel by setting the no_user_fence flag for the JPEG v5.3.0 ring. Users should update their Linux kernel to a version that includes this fix. Patch status is confirmed resolved by the vendor commit. No additional mitigation steps are indicated.
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/jpeg: set no_user_fence for JPEG v5.3.0 ring JPEG rings do not… (CVE-2026-63840)
Description
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/jpeg: set no_user_fence for JPEG v5.3.0 ring JPEG rings do not support 64-bit user fence writes, reject CS submissions with user fences. (cherry picked from commit 86ac011ae234c03fb872f4945913391ea1d8862e)
CVSS v3.1
Score 7.8high
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel AMDGPU JPEG driver had a vulnerability where the JPEG rings did not support 64-bit user fence writes, which could cause issues when command submissions included user fences. The vulnerability was addressed by setting the no_user_fence flag for the JPEG v5.3.0 ring, effectively rejecting submissions with user fences to prevent misuse. This fix was applied via a specific commit (86ac011ae234c03fb872f4945913391ea1d8862e).
Potential Impact
The vulnerability could lead to improper handling of user fence writes in the AMDGPU JPEG driver, potentially causing stability or security issues related to command submission processing. No known exploits in the wild have been reported.
Mitigation Recommendations
An official fix has been applied in the Linux kernel by setting the no_user_fence flag for the JPEG v5.3.0 ring. Users should update their Linux kernel to a version that includes this fix. Patch status is confirmed resolved by the vendor commit. No additional mitigation steps are indicated.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-9f56-6f5c-c8vx
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-63840"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- 3.1
Threat ID: 6a5d27ac2a4a8d5989130f9b
Added to database: 07/19/2026, 19:38:20 UTC
Last enriched: 07/19/2026, 20:17:04 UTC
Last updated: 09/01/2026, 22:52:13 UTC
Views: 55
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