---
id: CVE-2025-68781
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  usb: phy: fsl-usb: Fix use-after-free in delayed work during device removal

  The delayed work item otg_event is initialized in fsl_otg_conf() and
  scheduled under two co…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  usb: phy: fsl-usb: Fix use-after-free in delayed work during device removal

  The delayed work item otg_event is initialized in fsl_otg_conf() and
  scheduled under two co…
severity: none
published: '2026-01-13'
updated: '2026-09-02'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-68781'
references:
  - url: 'https://git.kernel.org/stable/c/2e7c47e2eb3cfeadf78a1ccbac8492c60d508f23'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/41ca62e3e21e48c2903b3b45e232cf4f2ff7434f'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/69f9a0701abc3d1f8225074c56c27e6c16a37222'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00209
epssPercentile: 0.09879
ingestedAt: '2026-09-02T13:44:41.455Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

usb: phy: fsl-usb: Fix use-after-free in delayed work during device removal

The delayed work item otg_event is initialized in fsl_otg_conf() and
scheduled under two conditions:
1. When a host controller binds to the OTG controller.
2. When the USB ID pin state changes (cable insertion/removal).

A race condition occurs when the device is removed via fsl_otg_remove():
the fsl_otg instance may be freed while the delayed work is still pending
or executing. This leads to use-after-free when the work function
fsl_otg_event() accesses the already freed memory.

The problematic scenario:

(detach thread)            | (delayed work)
fsl_otg_remove()           |
  kfree(fsl_otg_dev) //FREE| fsl_otg_event()
                           |   og = container_of(...) //USE
                           |   og-> //USE

Fix this by calling disable_delayed_work_sync() in fsl_otg_remove()
before deallocating the fsl_otg structure. This ensures the delayed work
is properly canceled and completes execution prior to memory deallocation.

This bug was identified through static analysis.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.