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Vulnerability record · CVE-2023-53596 · published 4 October 2025

CVE-2023-53596: Linux kernel double free vulnerability

Linux · Linux Kernel

In the Linux kernel, the following vulnerability has been resolved: drivers: base: Free devm resources when unregistering a device In the current code, devres_release_all() only gets called if the device has a bus and has been probed. This leads to issues when using bus-less or driver-less devices where the device might never get freed if a managed resource holds a reference to the device. This is happening in the DRM framework for example. We should thus call devres_release_all() in the device_del() function to make sure that the device-managed actions are properly executed when the device is unregistered, even if it has neither a bus nor a driver. This is effectively the same change than commit 2f8d16a996da ("devres: release resources on device_del()") that got reverted by commit a525a3ddeaca ("driver core: free devres in device_release") over memory leaks concerns. This patch effectively combines the two commits mentioned above to release the resources both on device_del() and device_release() and get the best of both worlds.

7.8 CVSS 3.1 High EPSS 0.15% · top 96.1% CWE-415 · Double free
7.8CVSS 3.1 base score
0.15%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References
18 Jun 2026Last modified by NVD

Description

In the Linux kernel, the following vulnerability has been resolved: drivers: base: Free devm resources when unregistering a device In the current code, devres_release_all() only gets called if the device has a bus and has been probed. This leads to issues when using bus-less or driver-less devices where the device might never get freed if a managed resource holds a reference to the device. This is happening in the DRM framework for example. We should thus call devres_release_all() in the device_del() function to make sure that the device-managed actions are properly executed when the device is unregistered, even if it has neither a bus nor a driver. This is effectively the same change than commit 2f8d16a996da ("devres: release resources on device_del()") that got reverted by commit a525a3ddeaca ("driver core: free devres in device_release") over memory leaks concerns. This patch effectively combines the two commits mentioned above to release the resources both on device_del() and device_release() and get the best of both worlds.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/297992e5c63528e603666e36081836204fc36ec9 Patch
https://git.kernel.org/stable/c/3bcc4c2a096e8342c8c719e595ce15de212694dd Patch
https://git.kernel.org/stable/c/699fb50d99039a50e7494de644f96c889279aca3 Patch
https://git.kernel.org/stable/c/83e2ec36a92432e9445e853c12becbbae353b511 Patch
https://git.kernel.org/stable/c/b9ef4b0aa91d2f9f5951faafdbbd47cf01799ec3 Patch
https://git.kernel.org/stable/c/c8c426fae26086a0ca8ab6cc6da2de79810ec038 Patch

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Source: NIST National Vulnerability Database (record CVE-2023-53596), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.