What is CVE-2026-31766?

CVE-2026-31766 is a High severity Linux kernel vulnerability with a CVSS score of 7.1 out of 10, affecting Linux kernel versions from 6.16 onward and patched in 6.18.22, 6.19.12 and 7.0. CVE-2026-31766 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-31766?

CVE-2026-31766 has a CVSS score of 7.1 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H.

Is there a patch available for CVE-2026-31766?

Yes, CVE-2026-31766 has been patched. Fixed versions include 6.18.22, 6.19.12 and 7.0. If you are running Linux kernel 6.16 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-31766 actively exploited?

CVE-2026-31766 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-31766

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_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)

Package Linux Kernel

Published 2026-05-01

Last modified 2026-05-11

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.1

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

High

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Affected versions

Linux kernel versions 6.16 and later are affected. Fixed in 6.18.22, 6.19.12, 7.0 and their respective stable series.

Affected from

≥ 6.16

Fixed in

✓ 6.18.22 6.18.x ✓ 6.19.12 6.19.x ✓ 7.0

References

The following references provide additional information about CVE-2026-31766 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

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

Details

CVE ID CVE-2026-31766

Severity High

CVSS score 7.1 / 10

CVSS version 3.1

Published 2026-05-01

Modified 2026-05-11

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-31766?

CVE-2026-31766 is a High severity Linux kernel vulnerability with a CVSS score of 7.1 out of 10 . It affects Linux kernel versions from 6.16 onward and has been patched in 6.18.22, 6.19.12 and 7.0. CVE-2026-31766 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-31766?

CVE-2026-31766 has a CVSS score of 7.1 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H.
Is there a patch available for CVE-2026-31766?

Yes — CVE-2026-31766 has been patched. Fixed versions include 6.18.22, 6.19.12 and 7.0. If you are running Linux kernel 6.16 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-31766 actively exploited?

No — CVE-2026-31766 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.