CVE-2026-98997 drm/amdgpu/userq: only accept doorbell BOs as queue doorbell
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-98997?
CVE-2026-98997 is a vulnerability in Linux, published on 23 Oct 2026.
Official description
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)
Which versions are affected by CVE-2026-98997?
How do I fix CVE-2026-98997?
Upgrade to a fixed version.
Is CVE-2026-98997 being exploited?
There is no known exploitation of CVE-2026-98997 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-98997, DEBIAN-CVE-2026-98997, GHSA-9mxh-x95w-jrrc, UBUNTU-CVE-2026-98997.