drm/amdgpu/userq: only accept doorbell BOs as queue doorbell

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Summary

CVECVE-2026-98997
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-23 13:17:21 UTC
Updated2026-10-23 13:17:21 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/userq: only accept doorbell BOs as queue doorbell amdgpu_userq_get_doorbell_index() pins any BO passed as doorbell_handle into the doorbell domain. For a regular BO, TTM moves it with ttm_bo_move_null() and its contents are lost. Since an importer on the same device gets the exporter's GEM object, a client can do this to a buffer another client shared with it. Reject BOs that were not created in the doorbell domain. v2: drop the error message, use a local abo variable (Christian) (cherry picked from commit f7497bbc19db4821c62b9d97b31c9086feb2d917)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected f09c1e6077abd1bc2ddd2b97e1135215801ca7f9 112dbe2b10d6d088a6c599980dd960dcbfa55ff0 git Not specified
CNA Linux Linux affected f09c1e6077abd1bc2ddd2b97e1135215801ca7f9 8640b3f961d743d6dc0458c2b53a3af434690cc1 git Not specified
CNA Linux Linux affected f09c1e6077abd1bc2ddd2b97e1135215801ca7f9 7f7c88dbf4d543f6703e53bdeed380e886733167 git Not specified
CNA Linux Linux affected 6.16 Not specified
CNA Linux Linux unaffected 6.16 semver Not specified
CNA Linux Linux unaffected 6.18.57 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.11 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/112dbe2b10d6d088a6c599980dd960dcbfa55ff0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8640b3f961d743d6dc0458c2b53a3af434690cc1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7f7c88dbf4d543f6703e53bdeed380e886733167 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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