---
id: CVE-2025-40316
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  drm/mediatek: Fix device use-after-free on unbind

  A recent change fixed device reference leaks when looking up drm
  platform device driver data during bind() but failed…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  drm/mediatek: Fix device use-after-free on unbind

  A recent change fixed device reference leaks when looking up drm
  platform device driver data during bind() but failed…
severity: none
published: '2025-12-08'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T22:10:00.210'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-40316'
references:
  - url: 'https://git.kernel.org/stable/c/0142fe895986addf35885b43440718e567121155'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8ba827e09eb586e952d10e39406fa02d10bb591e'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/926d002e6d7e2f1fd5c1b53cf6208153ee7d380d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a5a896f8315de358a2932e2c23c42d550256046a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.0019
epssPercentile: 0.0803
ingestedAt: '2026-10-14T23:00:02.023Z'
---

## Overview

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

drm/mediatek: Fix device use-after-free on unbind

A recent change fixed device reference leaks when looking up drm
platform device driver data during bind() but failed to remove a partial
fix which had been added by commit 80805b62ea5b ("drm/mediatek: Fix
kobject put for component sub-drivers").

This results in a reference imbalance on component bind() failures and
on unbind() which could lead to a user-after-free.

Make sure to only drop the references after retrieving the driver data
by effectively reverting the previous partial fix.

Note that holding a reference to a device does not prevent its driver
data from going away so there is no point in keeping the reference.

## Remediation

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