Review reviewHigh

CVE-2026-31401

Linux Linux, linux kernel

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.

CVSS: 7.8
EPSS: 0.14%
CISA KEV: Not listed
Published: 2026.04.04

PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability0.14%

Technical severityCVSS 7.8

Vulnerability overview

Affected product and versions

Product: Linux Linux, linux kernel
Affected versions: >= 8bd0488b5ea58655ad6fdcbe0408ef49b16882b1 < d6efaa50af62fb0790dd1fd4e7e5506b46312510, >= 8bd0488b5ea58655ad6fdcbe0408ef49b16882b1 < 73c5b5aea1c443239c8cb4191b4af7a4bd6fd7b1, >= 8bd0488b5ea58655ad6fdcbe0408ef49b16882b1 < eb57dae20fdf6f3069cdc07821fa3bb46de381d7, >= 8bd0488b5ea58655ad6fdcbe0408ef49b16882b1 < 2b658c1c442ec1cd9eec5ead98d68662c40fe645, >= 6.11, >= 6.11 < 6.12.78, >= 6.13 < 6.18.20, >= 6.19 < 6.19.10, 7.0
Fixed versions: 6.12.78, 6.18.20, 6.19.10

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that Linux Linux, linux kernel and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE: CWE-787