Bug 2502290 (CVE-2026-63846)

Summary: CVE-2026-63846 kernel: drm/amdgpu/jpeg: set no_user_fence for JPEG v3.0 ring
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in the Linux kernel's `drm/amdgpu/jpeg` component, specifically within the JPEG v3.0 ring. This component does not support 64-bit user fence writes. Consequently, any command submissions (CS) that attempt to use 64-bit user fences will be rejected, leading to a functional limitation or denial of service for applications relying on this feature.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
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Description OSIDB Bzimport 2026-07-19 15:02:14 UTC
In the Linux kernel, the following vulnerability has been resolved:

drm/amdgpu/jpeg: set no_user_fence for JPEG v3.0 ring

JPEG rings do not support 64-bit user fence writes, reject CS
submissions with user fences.

(cherry picked from commit 4d7d774f100efb5089c86a1fb8c5bf47c63fc9ef)