drm/amdgpu/vcn: set no_user_fence for VCN v4.0 enc ring

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-63853
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 v4.0 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 fd852c048b46f9825e904a4f3f4538fe9d8827d9)

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: 0.001550000 probability, percentile 0.050840000 (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 8da1170a16e4d4b49fa07d1f75ad480847ff7eca 1286b6872de0aee1feeeaa6dbac86369806de9a5 git Not specified
CNA Linux Linux affected 8da1170a16e4d4b49fa07d1f75ad480847ff7eca 6bdd2ed6458d35c368fbe9550a4d7f342abd3a92 git Not specified
CNA Linux Linux affected 8da1170a16e4d4b49fa07d1f75ad480847ff7eca 51f694221047c84fa185be98210eb2c354ffb8c6 git Not specified
CNA Linux Linux affected 5.19 Not specified
CNA Linux Linux unaffected 5.19 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/6bdd2ed6458d35c368fbe9550a4d7f342abd3a92 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/1286b6872de0aee1feeeaa6dbac86369806de9a5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/51f694221047c84fa185be98210eb2c354ffb8c6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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