Review reviewHigh

CVE-2026-63844

Linux

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/jpeg: set no_user_fence for JPEG v4.0.3 ring JPEG rings do not support 64-bit user fence writes, reject CS submissions with user fences. (cherry picked from commit 2f6afc97d259d530f4f86c7743efbc573a8da927)

CVSS: 7.8
EPSS: -
CISA KEV: Not listed
Published: 2026.07.20

PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability-

Technical severityCVSS 7.8

Vulnerability overview

Affected product and versions

Product: Linux
Affected versions: >= e684e654eba9481a9f462a7bbf5c385b7d1c076e < b884ff67d62ef514eee9d5f605c03101c8b6bc98, >= e684e654eba9481a9f462a7bbf5c385b7d1c076e < d6bd2a5fd611ec9c8a2411f084cff2435c709608, >= e684e654eba9481a9f462a7bbf5c385b7d1c076e < 8549b3933038e68dc61cb934b9a54223dd244a78, >= e684e654eba9481a9f462a7bbf5c385b7d1c076e < 249fa7549736de1c8e327d7ca6b32fa148a40bd6, >= e684e654eba9481a9f462a7bbf5c385b7d1c076e < 83e37c0987ca92f9e87789b46dd311dcf5a4a6c8, >= 6.5
Fixed versions: No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that Linux and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE: Not available