SB2026080770 - Use-after-free in Linux kernel gadget function driver

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Main Vulnerability Database SB2026080770

SB2026080770 - Use-after-free in Linux kernel gadget function driver

Published: August 7, 2026

Security Bulletin ID SB2026080770
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-2026-64584)

CWE-ID: CWE-416 - Use After Free

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 use-after-free in the f_midi driver work handler when handling concurrent userspace writes to an open rawmidi substream during device teardown. A local user can write to a rawmidi substream to trigger pending work on a freed midi object and cause a denial of service.

The issue occurs because the rawmidi device can remain usable by an open substream after USB endpoints have been disabled and before the final midi object reference is released.


Remediation

Install update from vendor's website.

References