drm/amdgpu: add upper bound check on user inputs in signal ioctl

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Summary

CVECVE-2026-43400
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-08 15:16:51 UTC
Updated2026-05-12 14:10:27 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: add upper bound check on user inputs in signal ioctl Huge input values in amdgpu_userq_signal_ioctl can lead to a OOM and could be exploited. So check these input value against AMDGPU_USERQ_MAX_HANDLES which is big enough value for genuine use cases and could potentially avoid OOM. (cherry picked from commit be267e15f99bc97cbe202cd556717797cdcf79a5)

Risk And Classification

EPSS: 0.000170000 probability, percentile 0.041320000 (date 2026-05-12)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected a292fdecd72834b3bec380baa5db1e69e7f70679 6fff5204d8aa26b1be50b6427f833bd3e8899c4f git Not specified
CNA Linux Linux affected a292fdecd72834b3bec380baa5db1e69e7f70679 46630d966b99b0fc6cb01fef4110587f3375a0c0 git Not specified
CNA Linux Linux affected a292fdecd72834b3bec380baa5db1e69e7f70679 ea78f8c68f4f6211c557df49174c54d167821962 git Not specified
CNA Linux Linux affected 6.16 Not specified
CNA Linux Linux unaffected 6.16 semver Not specified
CNA Linux Linux unaffected 6.18.19 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.9 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/46630d966b99b0fc6cb01fef4110587f3375a0c0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ea78f8c68f4f6211c557df49174c54d167821962 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6fff5204d8aa26b1be50b6427f833bd3e8899c4f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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