CVE-2026-68367

kernel: usb: gadget: f_tcm: synchronize delayed set_alt with teardown

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · August 10, 2026

Updated · October 30, 2026

Description

A flaw was found in the Linux kernel's USB gadget function (f_tcm). A local attacker could exploit a race condition during the teardown of a USB gadget function. This could lead to a use-after-free vulnerability, potentially causing a system crash (denial of service) or, in more severe cases, arbitrary code execution.

Statement

This issue affects USB gadget TCM (f_tcm) target mode. Delayed set_alt work races with teardown causing UAF. Systems not using USB gadget TCM are not affected.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-364 · Signal Handler Race Condition