CVE-2026-63851

Severity CVSS v4.0:

Pending analysis

Type:

Unavailable / Other

Publication date:

19/07/2026

Last modified:

27/07/2026

Description

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/vcn: set no_user_fence for VCN v4.0.5 enc ring VCN encoder and decoder rings do not support 64-bit user fence writes, reject CS submissions with user fences. (cherry picked from commit 084d94ac93707bdda07efb5cee786f632de4219b)

Impact

Vector 3.x

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.80 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x

7.80

Severity 3.x

HIGH

References to Advisories, Solutions, and Tools

https://git.kernel.org/stable/c/589a254bf3e88204c8402b9cbccd5e23a0af990f
https://git.kernel.org/stable/c/6d9a98c5ed65ba92a09e4ca5a5f6941448145529
https://git.kernel.org/stable/c/75091030f07b7957cc0646cd52e2d9d15f611483
https://git.kernel.org/stable/c/7f23b5c420b9f68a210c29c5123bace670aa8cc9