What is CVE-2026-31781?

CVE-2026-31781 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 3.16.63 onward and patched in 5.10.253, 5.15.203, 6.1.168 and others. CVE-2026-31781 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-31781?

CVE-2026-31781 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2026-31781?

Yes, CVE-2026-31781 has been patched. Fixed versions include 5.10.253, 5.15.203, 6.1.168 and others. If you are running Linux kernel 3.16.63 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-31781 actively exploited?

CVE-2026-31781 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-31781

Medium

In the Linux kernel, the following vulnerability has been resolved: drm/ioc32: stop speculation on the drm_compat_ioctl path The drm compat ioctl path takes a user controlled pointer, and then dereferences it into a table of function pointers, the signature method of spectre problems. Fix this up by calling array_index_nospec() on the index to the function pointer list.

Package Linux Kernel

Published 2026-05-01

Last modified 2026-05-11

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Affected versions

Linux kernel versions 3.16.63, 4.4.170, 4.9.148, 4.14.91, 4.19.13, 4.20 and later are affected. Fixed in 5.10.253, 5.15.203, 6.1.168, 6.6.134, 6.12.81, 6.18.22, 6.19.12, 7.0 and their respective stable series.

Affected from

≥ 3.16.63 ≥ 4.4.170 ≥ 4.9.148 ≥ 4.14.91 ≥ 4.19.13 ≥ 4.20

Fixed in

✓ 5.10.253 5.10.x ✓ 5.15.203 5.15.x ✓ 6.1.168 6.1.x ✓ 6.6.134 6.6.x ✓ 6.12.81 6.12.x ✓ 6.18.22 6.18.x ✓ 6.19.12 6.19.x ✓ 7.0

References

The following references provide additional information about CVE-2026-31781 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/27ef84bba9b9d7b03418c60fbc6069ea0e87b13c
Patch
Kernel patch commit
https://git.kernel.org/stable/c/46a60ee8956ef1975f00455f614761c7ecedc09d
Patch
Kernel patch commit
https://git.kernel.org/stable/c/489f2ef2b908898d01df697dc4fe1476674be640
Patch

8 patch commits total View all on NVD

Details

CVE ID CVE-2026-31781

Severity Medium

CVSS score 5.5 / 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-2026-31781?

CVE-2026-31781 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 3.16.63 onward and has been patched in 5.10.253, 5.15.203, 6.1.168 and others. CVE-2026-31781 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-31781?

CVE-2026-31781 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2026-31781?

Yes — CVE-2026-31781 has been patched. Fixed versions include 5.10.253, 5.15.203, 6.1.168 and others. If you are running Linux kernel 3.16.63 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-31781 actively exploited?

No — CVE-2026-31781 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.