Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2026-63856

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:<br /> <br /> drm/amdgpu/vcn: set no_user_fence for VCN v2.0 enc/dec rings<br /> <br /> VCN encoder and decoder rings do not support 64-bit user fence writes,<br /> reject CS submissions with user fences.<br /> <br /> (cherry picked from commit e2b5499fca55f1a32960a311bbb62e35891eaf73)

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