SB20260727109 - Improper locking in Linux kernel usb dwc3 driver

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Main Vulnerability Database SB20260727109

SB20260727109 - Improper locking in Linux kernel usb dwc3 driver

Published: July 27, 2026

Security Bulletin ID SB20260727109
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper locking (CVE-ID: CVE-2026-64454)

CWE-ID: CWE-667 - Improper Locking

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper lock handling in the dwc3 gadget disconnect callback path when suspending the gadget. A local user can trigger a gadget disconnect during suspend to cause a denial of service.

The issue occurs because the disconnect callback may run in a non-sleepable context with IRQs disabled, which can trigger kernel lockdep warnings and sleeping-function-in-invalid-context failures.


Remediation

Install update from vendor's website.

References