drm/amdgpu/vcn: set no_user_fence for VCN v5.0.1 enc ring

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-63849
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 v5.0.1 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 e16be95a2c3ee712b142cb27d2dca0b461181359)

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: 0.001660000 probability, percentile 0.062380000 (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 346492f30ce3581bf5324c4ae417eab8537dc998 081ef0e46c9cdd26c0db0ef721470393d36b6655 git Not specified
CNA Linux Linux affected 346492f30ce3581bf5324c4ae417eab8537dc998 5a4bffd67e94944ed3db26a959346cfb7fabaecd git Not specified
CNA Linux Linux affected 346492f30ce3581bf5324c4ae417eab8537dc998 8f4954722eab88e10c4ea0c0d3b1269c31421d3a git Not specified
CNA Linux Linux affected 6.14 Not specified
CNA Linux Linux unaffected 6.14 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/081ef0e46c9cdd26c0db0ef721470393d36b6655 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8f4954722eab88e10c4ea0c0d3b1269c31421d3a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/5a4bffd67e94944ed3db26a959346cfb7fabaecd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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