drm/amdgpu/userq: Do not allow userspace to trivially triger kernel warnings

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Summary

CVECVE-2026-23338
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-03-25 11:16:31 UTC
Updated2026-04-23 21:17:25 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/userq: Do not allow userspace to trivially triger kernel warnings Userspace can either deliberately pass in the too small num_fences, or the required number can legitimately grow between the two calls to the userq wait ioctl. In both cases we do not want the emit the kernel warning backtrace since nothing is wrong with the kernel and userspace will simply get an errno reported back. So lets simply drop the WARN_ONs. (cherry picked from commit 2c333ea579de6cc20ea7bc50e9595ef72863e65c)

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Problem Types: NVD-CWE-noinfo

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected a292fdecd72834b3bec380baa5db1e69e7f70679 1753f5f81ab60a553287f9ee659a6ac363adf8d7 git Not specified
CNA Linux Linux affected a292fdecd72834b3bec380baa5db1e69e7f70679 7321302edca3a349ddaea689df95b986beee6c4a git Not specified
CNA Linux Linux affected a292fdecd72834b3bec380baa5db1e69e7f70679 7b7d7693a55d606d700beb9549c9f7f0e5d9c24f git Not specified
CNA Linux Linux affected 6.16 Not specified
CNA Linux Linux unaffected 6.16 semver Not specified
CNA Linux Linux unaffected 6.18.17 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.7 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/7b7d7693a55d606d700beb9549c9f7f0e5d9c24f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/7321302edca3a349ddaea689df95b986beee6c4a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/1753f5f81ab60a553287f9ee659a6ac363adf8d7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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