CVEvulnerability
CVE-2026-31766
7.1 HIGH
Official page ↗
- Status
- Analyzed
- Published
- 2026-05-01
- Last modified
- 2026-06-17
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
- CVSS 3.1 (416baaa9-dc9f-4396-8d5f-8c081fb06d67)
- 7.1 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Description
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)
Affected configurations
• linux linux kernel (>= 6.16 < 6.18.22)
• linux linux kernel (>= 6.19 < 6.19.12)
• linux linux kernel 7.0