drm/amdgpu/vcn: set no_user_fence for VCN v2.5 enc/dec rings

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-63855
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 v2.5 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 efc9dd5590894109bce9a0bfe1fa5592dd6b20b1)

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 0.052670000 (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 28c17d72072b7ce5cc13a527dcbfc045cc995e7d 2c6fb056567efb49f8674108b86088a1cfaa86d0 git Not specified
CNA Linux Linux affected 28c17d72072b7ce5cc13a527dcbfc045cc995e7d 8f0ea4524dc71c6c9ec97f2711f46e12f624140f git Not specified
CNA Linux Linux affected 28c17d72072b7ce5cc13a527dcbfc045cc995e7d 602d4c5872b25ddd4d82fb2025efb9a05b187bb3 git Not specified
CNA Linux Linux affected 28c17d72072b7ce5cc13a527dcbfc045cc995e7d 5a3c6f76cab164a5d803084908d7050f649ab7f9 git Not specified
CNA Linux Linux affected 28c17d72072b7ce5cc13a527dcbfc045cc995e7d 4f317863a3ab212a027d8c8c3cc3af4e3fb95704 git Not specified
CNA Linux Linux affected 5.4 Not specified
CNA Linux Linux unaffected 5.4 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/4f317863a3ab212a027d8c8c3cc3af4e3fb95704 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/5a3c6f76cab164a5d803084908d7050f649ab7f9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8f0ea4524dc71c6c9ec97f2711f46e12f624140f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/602d4c5872b25ddd4d82fb2025efb9a05b187bb3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/2c6fb056567efb49f8674108b86088a1cfaa86d0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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