CVE-2026-31766

In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu: validate doorbell_offset in user queue creation amdgpu_userq_get_doorbell_index() passes the user-provided doorbell_offset to amdgpu_doorbell_index_on_bar() without bounds checking. An arbitrarily large doorbell_offset can cause the calculated doorbell index to fall outside the allocated doorbell BO, potentially corrupting kernel doorbell space. Validate that doorbell_offset falls within the doorbell BO before computing the BAR index, using u64 arithmetic to prevent overflow. (cherry picked from commit de1ef4ffd70e1d15f0bf584fd22b1f28cbd5e2ec)

The following products are affected by CVE-2026-31766 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-31766.

URL	Resource
https://git.kernel.org/stable/c/3543005a42d7e8e12b21897ef6798541bf7cbcd3
https://git.kernel.org/stable/c/86b732fbc37ce4fb76cdd4af0fb7e30a6acdbce6
https://git.kernel.org/stable/c/a018d1819f158991b7308e4f74609c6c029b670c
https://lore.kernel.org/linux-cve-announce/2026050147-CVE-2026-31766-dd6d@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2026-31766
https://www.cve.org/CVERecord?id=CVE-2026-31766