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CVE-2026-31766

7.1 · HIGH

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…

Published May 1, 2026EPSS 0.17%

Overview

CVE-2026-31766 is a high-severity vulnerability. It was published on May 1, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical 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)

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/3543005a42d7e8e12b21897ef6798541bf7cbcd3Refgit.kernel.org/stable/c/86b732fbc37ce4fb76cdd4af0fb7e30a6acdbce6Refgit.kernel.org/stable/c/a018d1819f158991b7308e4f74609c6c029b670c

How CyberStrike helps

Frequently asked questions

What is CVE-2026-31766?

CVE-2026-31766 is a high-severity vulnerability. It was published on May 1, 2026 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2026-31766?

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-31766?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-31766?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-31766 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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