CVE-2026-31766
Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
01/05/2026
Last modified:
11/05/2026
Description
In the Linux kernel, the following vulnerability has been resolved:<br />
<br />
drm/amdgpu: validate doorbell_offset in user queue creation<br />
<br />
amdgpu_userq_get_doorbell_index() passes the user-provided<br />
doorbell_offset to amdgpu_doorbell_index_on_bar() without bounds<br />
checking. An arbitrarily large doorbell_offset can cause the<br />
calculated doorbell index to fall outside the allocated doorbell BO,<br />
potentially corrupting kernel doorbell space.<br />
<br />
Validate that doorbell_offset falls within the doorbell BO before<br />
computing the BAR index, using u64 arithmetic to prevent overflow.<br />
<br />
(cherry picked from commit de1ef4ffd70e1d15f0bf584fd22b1f28cbd5e2ec)
Impact
Base Score 3.x
7.10
Severity 3.x
HIGH
Vulnerable products and versions
| CPE | From | Up to |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 6.16 (including) | 6.18.22 (excluding) |
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 6.19 (including) | 6.19.12 (excluding) |
| cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* | ||
| cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* | ||
| cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* | ||
| cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:* | ||
| cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:* | ||
| cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:* |
To consult the complete list of CPE names with products and versions, see this page