SB20261022375 - Race condition in Linux kernel gadget udc driver

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Main Vulnerability Database SB20261022375

SB20261022375 - Race condition in Linux kernel gadget udc driver

Published: October 22, 2026

Security Bulletin ID SB20261022375
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) Race condition (CVE-ID: CVE-2026-98765)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: 5.6 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local privileged user to potentially cause a denial of service through a race between USB gadget request completion and driver teardown.

The vulnerability exists due to incomplete synchronization of request completion callbacks in the Linux kernel dummy-hcd driver when waiting for outstanding callbacks during gadget driver teardown. A local privileged user can trigger overlapping request completion and teardown operations, potentially allowing a gadget driver's module to be unloaded while a completion handler is still running and causing a kernel crash.


Remediation

Install update from vendor's website.

References