SB20260727350 - Use-after-free in Linux kernel gadget function driver

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Main Vulnerability Database SB20260727350

SB20260727350 - Use-after-free in Linux kernel gadget function driver

Published: July 27, 2026

Security Bulletin ID SB20260727350
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) Use-after-free (CVE-ID: CVE-2026-64233)

CWE-ID: CWE-416 - Use After Free

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 cause a use-after-free.

The vulnerability exists due to a use-after-free in uvc_function_bind() and descriptor handling for extension unit list walks when binding the UVC gadget function while concurrently removing an extension unit configfs directory. A local privileged user can bind the function and race configfs extension removal to cause a use-after-free.

Exploitation requires the ability to mount configfs and write gadget UDC files.


Remediation

Install update from vendor's website.

References