SB2026050792 - Improper input validation in Linux kernel hid driver

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Main Vulnerability Database SB2026050792

SB2026050792 - Improper input validation in Linux kernel hid driver

Published: May 7, 2026

Security Bulletin ID SB2026050792
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Physical access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper input validation (CVE-ID: CVE-2026-43251)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows an attacker with physical access to cause a denial of service.

The vulnerability exists due to improper input validation in the prodikeys HID driver when processing a forged USB report descriptor from a fake device. An attacker with physical access can connect a crafted USB device to trigger a kernel crash and cause a denial of service.

The issue occurs because the input_mapping() hook may not be called, leaving pm->input_ep82 unset.


Remediation

Install update from vendor's website.

References