SB2026091242 - Use-after-free in Linux kernel usb dwc3 driver
Published: September 12, 2026
Security Bulletin ID
SB2026091242
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-89739)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 1.8 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a local privileged user to trigger a use-after-free condition.
The vulnerability exists due to a race condition in dwc3_gadget_free_endpoints when a stream no-stream event is processed while gadget endpoints are being removed. A local privileged user can cause delayed work to access an endpoint after its memory has been freed to trigger a use-after-free condition.
Remediation
Install update from vendor's website.