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.
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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. 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 Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 9.
Will not fix / out of support: Red Hat Enterprise Linux 6. Red Hat does not currently list a fixing RHSA for this CVE.
Affected products named by the advisory: Red Hat package: kernel-rt.
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 6 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 6 days ago·verify at source
Mitigation
The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.
Official advisory · medium-confidence parse· fetched 6 days ago·verify at source
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