In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/jpeg: set no_user_fence for JPEG v5.0.1 ring JPEG rings do not… (CVE-2026-63841)
A vulnerability in the Linux kernel's AMDGPU JPEG driver was resolved by setting the no_user_fence flag for the JPEG v5.0.1 ring. The issue involved 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 Linux kernel AMDGPU JPEG driver had a vulnerability where the JPEG rings did not support 64-bit user fence writes but did not properly reject command submissions containing user fences. The vulnerability was addressed by setting the no_user_fence flag for the JPEG v5.0.1 ring, ensuring that command submissions with user fences are rejected. This fix was introduced via a specific commit (742a98e2e81702df8fe1b1eccee5223220a03dc2).
Potential Impact
The vulnerability could allow improper command submissions involving user fences in the AMDGPU JPEG driver, potentially leading to unexpected behavior or instability in the kernel graphics subsystem. No known exploits in the wild have been reported. The exact impact on system security or stability is not detailed in the available information.
Mitigation Recommendations
A fix has been applied in the Linux kernel by setting the no_user_fence flag for the affected JPEG ring. Users should update their Linux kernel to a version that includes this commit to ensure the vulnerability is resolved. Since this is a kernel-level fix, applying official kernel updates 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 v5.0.1 ring JPEG rings do not… (CVE-2026-63841)
Description
A vulnerability in the Linux kernel's AMDGPU JPEG driver was resolved by setting the no_user_fence flag for the JPEG v5.0.1 ring. The issue involved 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 Linux kernel AMDGPU JPEG driver had a vulnerability where the JPEG rings did not support 64-bit user fence writes but did not properly reject command submissions containing user fences. The vulnerability was addressed by setting the no_user_fence flag for the JPEG v5.0.1 ring, ensuring that command submissions with user fences are rejected. This fix was introduced via a specific commit (742a98e2e81702df8fe1b1eccee5223220a03dc2).
Potential Impact
The vulnerability could allow improper command submissions involving user fences in the AMDGPU JPEG driver, potentially leading to unexpected behavior or instability in the kernel graphics subsystem. No known exploits in the wild have been reported. The exact impact on system security or stability is not detailed in the available information.
Mitigation Recommendations
A fix has been applied in the Linux kernel by setting the no_user_fence flag for the affected JPEG ring. Users should update their Linux kernel to a version that includes this commit to ensure the vulnerability is resolved. Since this is a kernel-level fix, applying official kernel updates from the vendor or distribution is the recommended remediation.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-8cvv-rxg7-8gc2
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-63841"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a5d27ac2a4a8d5989130fa0
Added to database: 07/19/2026, 19:38:20 UTC
Last enriched: 07/19/2026, 20:17:09 UTC
Last updated: 07/20/2026, 17:26:47 UTC
Views: 8
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