drm/amdgpu/vcn: set no_user_fence for VCN v4.0.3 enc ring

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-63852
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 v4.0.3 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 ff1a5a125c5a70c328806b9bc01d7d942cf3f9aa)

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 0.052460000 (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 b889ef4ac98837838c38f7b9f72bba2f33ee367d c12a5d35033c0640c57c10d7111c010c7b9c2c8e git Not specified
CNA Linux Linux affected b889ef4ac98837838c38f7b9f72bba2f33ee367d 387b7c7667bd5c53549350ddad866d2fcf75a529 git Not specified
CNA Linux Linux affected b889ef4ac98837838c38f7b9f72bba2f33ee367d 9076a83e5adefd10dc5c967c7b8bde601c4c512a git Not specified
CNA Linux Linux affected b889ef4ac98837838c38f7b9f72bba2f33ee367d 0177ac6141c8857130cf365369c74dee7b6b1f7f git Not specified
CNA Linux Linux affected b889ef4ac98837838c38f7b9f72bba2f33ee367d 4532b52b34e4e4310386e6fdf6a643368599f522 git Not specified
CNA Linux Linux affected 6.5 Not specified
CNA Linux Linux unaffected 6.5 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/c12a5d35033c0640c57c10d7111c010c7b9c2c8e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/387b7c7667bd5c53549350ddad866d2fcf75a529 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9076a83e5adefd10dc5c967c7b8bde601c4c512a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/4532b52b34e4e4310386e6fdf6a643368599f522 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/0177ac6141c8857130cf365369c74dee7b6b1f7f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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