Bug 2502283 (CVE-2026-63841)

Summary: CVE-2026-63841 kernel: drm/amdgpu/jpeg: set no_user_fence for JPEG v5.0.1 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 amdgpu graphics driver, specifically within the JPEG component. This vulnerability occurs because the JPEG rings do not correctly support 64-bit user fence writes. A local attacker could exploit this by submitting command requests with 64-bit user fences, causing the system to reject these submissions. This could lead to a denial of service or functional limitation for applications relying on the JPEG ring operations.
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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 15:01:53 UTC
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 support 64-bit user fence writes, reject CS
submissions with user fences.

(cherry picked from commit 742a98e2e81702df8fe1b1eccee5223220a03dc2)