SB20260528156 - Improper input validation in Linux kernel net usb driver

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Main Vulnerability Database SB20260528156

SB20260528156 - Improper input validation in Linux kernel net usb driver

Published: May 28, 2026

Security Bulletin ID SB20260528156
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-2026-45923)

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 catc USB network driver when probing a malformed USB device with mismatched endpoint descriptors. An attacker with physical access can connect a specially crafted USB device to cause a denial of service.

The issue occurs because the driver assumes specific bulk and interrupt endpoint types for hardcoded endpoint numbers during device initialization.


Remediation

Install update from vendor's website.

References