CVE-2026-98997

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)

• https://git.kernel.org/stable/c/112dbe2b10d6d088a6c599980dd960dcbfa55ff0
• https://git.kernel.org/stable/c/7f7c88dbf4d543f6703e53bdeed380e886733167
• https://git.kernel.org/stable/c/8640b3f961d743d6dc0458c2b53a3af434690cc1

Published

Oct 23, 2026

Last Modified

Oct 23, 2026

Status

Received

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