PT-2026-121974
CVE-2026-98997
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Published
2026-10-23
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Updated
2026-10-23
Description by
Score
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In 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)
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