What’s Vulnerable › Vulnerabilities

CVE-2026-98997: drm/amdgpu/userq: only accept doorbell BOs as queue doorbell

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-23 · updated 2026-10-23

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)

Affected products

• Linux kernel: 6.16 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

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

Get alerted when CVE-2026-98997 or the next vulnerability affects your stack