drm/amdgpu/vcn: set no_user_fence for VCN v5.0.0 enc ring

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-63850
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 v5.0.0 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 49b1fbbb5a071197ee71e2d70959b1cb29bdc317)

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: 0.001680000 probability, percentile 0.064730000 (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 b6d1a06320519ac3bfda6ce81067a1bc409b9cff 9f5a1459ecc3195282be617639d710b54779c9dc git Not specified
CNA Linux Linux affected b6d1a06320519ac3bfda6ce81067a1bc409b9cff 139a8a52ef4349c62129703b3a3e3a6ae4d634eb git Not specified
CNA Linux Linux affected b6d1a06320519ac3bfda6ce81067a1bc409b9cff 2c350f3cd94be847ac216e1358ec7001eaaf0934 git Not specified
CNA Linux Linux affected b6d1a06320519ac3bfda6ce81067a1bc409b9cff 8cae0ce77de492d7c31c1532a2e80c0c6e7e58cb git Not specified
CNA Linux Linux affected 6.9 Not specified
CNA Linux Linux unaffected 6.9 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/2c350f3cd94be847ac216e1358ec7001eaaf0934 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9f5a1459ecc3195282be617639d710b54779c9dc 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8cae0ce77de492d7c31c1532a2e80c0c6e7e58cb 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/139a8a52ef4349c62129703b3a3e3a6ae4d634eb 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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