drm/amdgpu/vcn: set no_user_fence for VCN v4.0.5 enc ring

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-63851
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-19 15:16:51 UTC
Updated2026-07-20 15:16:51 UTC
DescriptionIn 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)

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.001570000 probability, percentile 0.052460000 (date 2026-07-20)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 547aad32edac17a3ec4989d8aad2426d0cbeb590 75091030f07b7957cc0646cd52e2d9d15f611483 git Not specified
CNA Linux Linux affected 547aad32edac17a3ec4989d8aad2426d0cbeb590 6d9a98c5ed65ba92a09e4ca5a5f6941448145529 git Not specified
CNA Linux Linux affected 547aad32edac17a3ec4989d8aad2426d0cbeb590 7f23b5c420b9f68a210c29c5123bace670aa8cc9 git Not specified
CNA Linux Linux affected 547aad32edac17a3ec4989d8aad2426d0cbeb590 589a254bf3e88204c8402b9cbccd5e23a0af990f git Not specified
CNA Linux Linux affected 6.7 Not specified
CNA Linux Linux unaffected 6.7 semver Not specified
CNA Linux Linux unaffected 6.12.91 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.33 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.10 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/589a254bf3e88204c8402b9cbccd5e23a0af990f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6d9a98c5ed65ba92a09e4ca5a5f6941448145529 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7f23b5c420b9f68a210c29c5123bace670aa8cc9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/75091030f07b7957cc0646cd52e2d9d15f611483 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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