In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/jpeg: set no_user_fence for JPEG v4.0 ring JPEG rings do not support… (CVE-2026-63845)
A vulnerability in the Linux kernel's AMD GPU JPEG driver was resolved by setting the no_user_fence flag for the JPEG v4.0 ring. The issue involved the JPEG rings not supporting 64-bit user fence writes and rejecting command submissions that included user fences. This fix prevents improper handling of user fences in this component.
AI Analysis
Technical Summary
The vulnerability in the Linux kernel affects the drm/amdgpu/jpeg component, specifically the JPEG v4.0 ring. The JPEG rings do not support 64-bit user fence writes, which could lead to incorrect processing of command submissions containing user fences. The resolution involved setting the no_user_fence flag to reject such submissions, thereby addressing the issue. This fix was integrated via a commit cherry-picked into the kernel source.
Potential Impact
The vulnerability could cause improper handling of command submissions involving user fences in the AMD GPU JPEG driver, potentially leading to stability or security issues related to synchronization primitives. No known exploits are reported in the wild. The exact impact severity is not detailed in the available data.
Mitigation Recommendations
A fix has been applied in the Linux kernel source by setting the no_user_fence flag for the JPEG v4.0 ring. Users should update their Linux kernel to a version that includes this commit to remediate the vulnerability. Since this is a kernel-level fix, applying the official kernel update from the vendor or distribution is the recommended remediation.
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/jpeg: set no_user_fence for JPEG v4.0 ring JPEG rings do not support… (CVE-2026-63845)
Description
A vulnerability in the Linux kernel's AMD GPU JPEG driver was resolved by setting the no_user_fence flag for the JPEG v4.0 ring. The issue involved the JPEG rings not supporting 64-bit user fence writes and rejecting command submissions that included user fences. This fix prevents improper handling of user fences in this component.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in the Linux kernel affects the drm/amdgpu/jpeg component, specifically the JPEG v4.0 ring. The JPEG rings do not support 64-bit user fence writes, which could lead to incorrect processing of command submissions containing user fences. The resolution involved setting the no_user_fence flag to reject such submissions, thereby addressing the issue. This fix was integrated via a commit cherry-picked into the kernel source.
Potential Impact
The vulnerability could cause improper handling of command submissions involving user fences in the AMD GPU JPEG driver, potentially leading to stability or security issues related to synchronization primitives. No known exploits are reported in the wild. The exact impact severity is not detailed in the available data.
Mitigation Recommendations
A fix has been applied in the Linux kernel source by setting the no_user_fence flag for the JPEG v4.0 ring. Users should update their Linux kernel to a version that includes this commit to remediate the vulnerability. Since this is a kernel-level fix, applying the official kernel update from the vendor or distribution is the recommended remediation.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-pvx7-4g2w-qq4j
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-63845"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a5d27ac2a4a8d5989130c9a
Added to database: 07/19/2026, 19:38:20 UTC
Last enriched: 07/19/2026, 20:16:41 UTC
Last updated: 07/20/2026, 17:26:47 UTC
Views: 11
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