What is CVE-2026-31401?

CVE-2026-31401 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, classified as a Out-of-bounds Write flaw (CWE-787), affecting Linux kernel versions from 6.11 onward and patched in 6.12.78, 6.18.20, 6.19.10 and others. CVE-2026-31401 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-31401?

CVE-2026-31401 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2026-31401?

Yes, CVE-2026-31401 has been patched. Fixed versions include 6.12.78, 6.18.20, 6.19.10 and others. If you are running Linux kernel 6.11 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-31401 actively exploited?

CVE-2026-31401 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Out-of-bounds Write (CWE-787)?

The product writes data past the end or before the beginning of the intended buffer. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/787.html

CVE-2026-31401

High

In the Linux kernel, the following vulnerability has been resolved: HID: bpf: prevent buffer overflow in hid_hw_request right now the returned value is considered to be always valid. However, when playing with HID-BPF, the return value can be arbitrary big, because it's the return value of dispatch_hid_bpf_raw_requests(), which calls the struct_ops and we have no guarantees that the value makes sense.

Package Linux Kernel

Published 2026-04-03

Last modified 2026-07-24

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-787

CVE-2026-31401 is a Out-of-bounds Write vulnerability

What is Out-of-bounds Write?

The product writes data past the end or before the beginning of the intended buffer. Learn more on MITRE CWE

Affected versions

Linux kernel versions 6.11 and later are affected. Fixed in 6.12.78, 6.18.20, 6.19.10, 7.0 and their respective stable series.

Affected from

≥ 6.11

Fixed in

✓ 6.12.78 6.12.x ✓ 6.18.20 6.18.x ✓ 6.19.10 6.19.x ✓ 7.0

References

4 total

Kernel Git
https://git.kernel.org/stable/c/2b658c1c442ec1cd9eec5ead98d68662c40fe645

Patch
Kernel Git
https://git.kernel.org/stable/c/73c5b5aea1c443239c8cb4191b4af7a4bd6fd7b1

Patch
Kernel Git
https://git.kernel.org/stable/c/d6efaa50af62fb0790dd1fd4e7e5506b46312510

Patch
Kernel Git
https://git.kernel.org/stable/c/eb57dae20fdf6f3069cdc07821fa3bb46de381d7

Patch

Details

CVE ID CVE-2026-31401

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2026-04-03

Modified 2026-07-24

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-31401?

CVE-2026-31401 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as an Out-of-bounds Write flaw (CWE-787) . It affects Linux kernel versions from 6.11 onward and has been patched in 6.12.78, 6.18.20, 6.19.10 and others. CVE-2026-31401 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-31401?

CVE-2026-31401 has a CVSS score of 7.8 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:H/I:H/A:H.
Is there a patch available for CVE-2026-31401?

Yes. CVE-2026-31401 has been patched. Fixed versions include 6.12.78, 6.18.20, 6.19.10 and others. If you are running Linux kernel 6.11 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-31401 actively exploited?

No. CVE-2026-31401 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.