drm/amdgpu/vcn: set no_user_fence for VCN v2.0 enc/dec rings

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-63856
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 v2.0 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 e2b5499fca55f1a32960a311bbb62e35891eaf73)

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 1b61de45dfaff00b627e47349a019658e39268b9 f264019be80de79f84f464846451445923bffea0 git Not specified
CNA Linux Linux affected 1b61de45dfaff00b627e47349a019658e39268b9 5e777bc4cbe928ac0fd95e368fee1540f2ce4db2 git Not specified
CNA Linux Linux affected 1b61de45dfaff00b627e47349a019658e39268b9 ac06ce5cac9e711281585d09d00c6efcd9b86396 git Not specified
CNA Linux Linux affected 1b61de45dfaff00b627e47349a019658e39268b9 c71aecae98e42dcf2baf462df50b3a2cf1a93fe4 git Not specified
CNA Linux Linux affected 1b61de45dfaff00b627e47349a019658e39268b9 8d80b293b41fcb5e9396db93e788b0f4ebcbafb7 git Not specified
CNA Linux Linux affected 5.3 Not specified
CNA Linux Linux unaffected 5.3 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/f264019be80de79f84f464846451445923bffea0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8d80b293b41fcb5e9396db93e788b0f4ebcbafb7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c71aecae98e42dcf2baf462df50b3a2cf1a93fe4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ac06ce5cac9e711281585d09d00c6efcd9b86396 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/5e777bc4cbe928ac0fd95e368fee1540f2ce4db2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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