CVE-2023-53596 - drivers: base: Free devm resources when unregistering a device

CVE-2023-53596 - drivers: base: Free devm resources when unregistering a device

https://cvefeed.io/rssfeed/latest.atom / Sat, 10/04/2025 - 20:42
CVE ID : CVE-2023-53596
Published : Oct. 4, 2025, 4:15 p.m. | 2 hours, 26 minutes ago
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.
Severity: 0.0 | NA
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