---
id: CVE-2025-68312
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  usbnet: Prevents free active kevent

  The root cause of this issue are:
  1
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  usbnet: Prevents free active kevent

  The root cause of this issue are:
  1. When probing the usbnet device, executing usbnet_link_change(dev, 0, 0);
  put the kevent work i…
severity: none
published: '2025-12-16'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T16:10:00.250'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-68312'
references:
  - url: 'https://git.kernel.org/stable/c/285d4b953f2ca03c358f986718dd89ee9bde632e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/2ce1de32e05445d77fc056f6ff8339cfb78a5f84'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/3a10619fdefd3051aeb14860e4d4335529b4e94d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/420c84c330d1688b8c764479e5738bbdbf0a33de'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/43005002b60ef3424719ecda16d124714b45da3b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/5158fb8da162e3982940f30cd01ed77bdf42c6fc'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/88a38b135d69f5db9024ff6527232f1b51be8915'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/9a579d6a39513069d298eee70770bbac8a148565'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00197
epssPercentile: 0.08751
ingestedAt: '2026-10-14T16:40:32.055Z'
---

## Overview

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

usbnet: Prevents free active kevent

The root cause of this issue are:
1. When probing the usbnet device, executing usbnet_link_change(dev, 0, 0);
put the kevent work in global workqueue. However, the kevent has not yet
been scheduled when the usbnet device is unregistered. Therefore, executing
free_netdev() results in the "free active object (kevent)" error reported
here.

2. Another factor is that when calling usbnet_disconnect()->unregister_netdev(),
if the usbnet device is up, ndo_stop() is executed to cancel the kevent.
However, because the device is not up, ndo_stop() is not executed.

The solution to this problem is to cancel the kevent before executing
free_netdev().

## Remediation

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