Medium [CVE-2026-63847] set no_user_fence for JPEG v2.5 ring
This medium-severity Red Hat Linux advisory covers CVE-2026-63847 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 9.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
VulniPulse record published Record updated
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Summary
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/jpeg: set no_user_fence for JPEG v2.5 ring JPEG rings do not support 64-bit user fence writes, reject CS submissions with user fences. (cherry picked from commit 3216a7f4e2642bda5fd14f57586e835ae9202587) A flaw was found in the Linux kernel's AMD GPU JPEG driver.
This issue occurs because the JPEG hardware component does not properly handle certain types of graphics commands, specifically 64-bit user fence writes. An attacker could craft and submit malicious commands, causing the system to reject these submissions.
This could lead to a denial of service, making the graphics functionality unavailable. This vulnerability is rated as Moderate severity because exploitation requires local access and only affects systems equipped with AMD graphics hardware utilizing the JPEG v2.5 engine.
An unprivileged local user with access to the direct rendering manager (DRM) interface could trigger a denial of service by submitting unsupported fence operations to the graphics ring, impacting driver availability without directly compromising system confidentiality or integrity.
Headless deployments or environments without affected AMD hardware are not exposed to this issue. Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).
Weakness: CWE-1287.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.
Official advisory · medium-confidence parse· fetched 5 days ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists. Confirm against the vendor advisory.
Official advisory · medium-confidence parse· fetched 5 days ago·verify at source
Mitigation
The source record does not include mitigation steps. That does not mean no fix exists. Read the vendor advisory below for the authoritative guidance.
Official advisory · medium-confidence parse· fetched 5 days ago·verify at source
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