CVE-2025-40316

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

State: Published
Severity: Not scored
Published: Dec 8, 2025
Updated: May 23, 2026
Reserved: Apr 16, 2025

Description

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	7d98166183d627c0b9daca7672b2191fae0f8a03 to before a5a896f8315de358a2932e2c23c42d550256046aAffected 31ce7c089b50c3d3056c37e0e25e7535e4428ae1 to before 0142fe895986addf35885b43440718e567121155Affected 1f403699c40f0806a707a9a6eed3b8904224021a to before 8ba827e09eb586e952d10e39406fa02d10bb591eAffected 1f403699c40f0806a707a9a6eed3b8904224021a to before 926d002e6d7e2f1fd5c1b53cf6208153ee7d380dAffected fae58d0155a979a8c414bbc12db09dd4b2f910d0Affected 6.6.105 to before 6.6.117Affected 6.12.45 to before 6.12.58Affected 6.16.5 to before 6.17Affected
LinuxLinux	6.17Affected before 6.17Not affected 6.6.117 through 6.6.Not affected 6.12.58 through 6.12.Not affected 6.17.8 through 6.17.*Not affected 6.18 and laterNot affected

Product

Versions

LinuxLinux

7d98166183d627c0b9daca7672b2191fae0f8a03 to before a5a896f8315de358a2932e2c23c42d550256046aAffected
31ce7c089b50c3d3056c37e0e25e7535e4428ae1 to before 0142fe895986addf35885b43440718e567121155Affected
1f403699c40f0806a707a9a6eed3b8904224021a to before 8ba827e09eb586e952d10e39406fa02d10bb591eAffected
1f403699c40f0806a707a9a6eed3b8904224021a to before 926d002e6d7e2f1fd5c1b53cf6208153ee7d380dAffected
fae58d0155a979a8c414bbc12db09dd4b2f910d0Affected
6.6.105 to before 6.6.117Affected
6.12.45 to before 6.12.58Affected
6.16.5 to before 6.17Affected

LinuxLinux

6.17Affected
before 6.17Not affected
6.6.117 through 6.6.*Not affected
6.12.58 through 6.12.*Not affected
6.17.8 through 6.17.*Not affected
6.18 and laterNot affected

References

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