CVE-2023-53596None▾ SunlitIn 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. …
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 5.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
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.
Linux >= a525a3ddeaca69f405d98442ab3c0746e53168dc < 83e2ec36a92432e9445e853c12becbbae353b511Linux >= a525a3ddeaca69f405d98442ab3c0746e53168dc < b9ef4b0aa91d2f9f5951faafdbbd47cf01799ec3Linux >= a525a3ddeaca69f405d98442ab3c0746e53168dc < 297992e5c63528e603666e36081836204fc36ec9Linux >= a525a3ddeaca69f405d98442ab3c0746e53168dc < 3bcc4c2a096e8342c8c719e595ce15de212694ddLinux >= a525a3ddeaca69f405d98442ab3c0746e53168dc < c8c426fae26086a0ca8ab6cc6da2de79810ec038Linux >= a525a3ddeaca69f405d98442ab3c0746e53168dc < 699fb50d99039a50e7494de644f96c889279aca3Linux 3.7Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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