SB20260508105 - NULL pointer dereference in Linux kernel gadget function driver

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Main Vulnerability Database SB20260508105

SB20260508105 - NULL pointer dereference in Linux kernel gadget function driver

Published: May 8, 2026

Security Bulletin ID SB20260508105
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) NULL pointer dereference (CVE-ID: CVE-2026-43424)

CWE-ID: CWE-476 - NULL Pointer Dereference

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 a NULL pointer dereference in the USB Target driver f_tcm BOT command and request processing paths when handling crafted Bulk-Only Transport commands during a race window where the nexus is not established or has just been dropped. An attacker with physical access can send a specially crafted USB request to cause a denial of service.

The issue occurs if requests arrive before the nexus is fully established or immediately after it is dropped.


Remediation

Install update from vendor's website.

References