High 7.1Published May 1, 2026

CVE-2026-31766drm/amdgpu: validate doorbell_offset in user queue creation

Updated under an hour ago (Oct 28, 2026, 3:00 AM ET)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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)

CVSS: 7.1 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: Aug 5, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from f09c1e6077abd1bc2ddd2b97e1135215801ca7f9 before 3543005a42d7e8e12b21897ef6798541bf7cbcd3; from f09c1e6077abd1bc2ddd2b97e1135215801ca7f9 before 86b732fbc37ce4fb76cdd4af0fb7e30a6acdbce6; from f09c1e6077abd1bc2ddd2b97e1135215801ca7f9 before a018d1819f158991b7308e4f74609c6c029b670c	CNA record
linux linux_kernel linux:linux_kernel	from 6.16 before 6.18.22; from 6.19 before 6.19.12; 7.0; 7.0; 7.0; 7.0; 7.0; 7.0	NVD

References

References

https://git.kernel.org/stable/c/3543005a42d7e8e12b21897ef6798541bf7cbcd3	patch
https://git.kernel.org/stable/c/86b732fbc37ce4fb76cdd4af0fb7e30a6acdbce6	patch
https://git.kernel.org/stable/c/a018d1819f158991b7308e4f74609c6c029b670c	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.