drm/amdgpu/vcn: set no_user_fence for VCN v3.0 enc/dec rings

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-63854
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-19 15:16:52 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 v3.0 enc/dec rings VCN encoder and decoder rings do not support 64-bit user fence writes, reject CS submissions with user fences. (cherry picked from commit 663bed3c7b8b9a7624b0d95d300ddae034ad0614)

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 0.052650000 (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 cf14826cdfb5c9fe10f98210d040b9d7486c381d e74fc9c72c1ba78d0de0b849f5929c3b39a8e20c git Not specified
CNA Linux Linux affected cf14826cdfb5c9fe10f98210d040b9d7486c381d 26c4f38529ac78930c9c4713e16ebc5b689bb0a3 git Not specified
CNA Linux Linux affected cf14826cdfb5c9fe10f98210d040b9d7486c381d 2d6525e7b2504f5bbfe9417cddc1e8da858791dd git Not specified
CNA Linux Linux affected cf14826cdfb5c9fe10f98210d040b9d7486c381d b076e45e6f757a2829e80d0144c1b5f201bee5af git Not specified
CNA Linux Linux affected cf14826cdfb5c9fe10f98210d040b9d7486c381d f1e5a6660d7cbf006079126d9babbf0ccf538c6b git Not specified
CNA Linux Linux affected 5.9 Not specified
CNA Linux Linux unaffected 5.9 semver Not specified
CNA Linux Linux unaffected 6.6.141 6.6.* 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/26c4f38529ac78930c9c4713e16ebc5b689bb0a3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f1e5a6660d7cbf006079126d9babbf0ccf538c6b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b076e45e6f757a2829e80d0144c1b5f201bee5af 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2d6525e7b2504f5bbfe9417cddc1e8da858791dd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e74fc9c72c1ba78d0de0b849f5929c3b39a8e20c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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