CVE-2024-50005 Information

Description

In the Linux kernel the following vulnerability has been resolved:

mac802154: Fix potential RCU dereference issue in mac802154_scan_worker

In the mac802154_scan_worker function the scan_req->type field was accessed after the RCU read-side critical section was unlocked. According to RCU usage rules this is illegal and can lead to unpredictable behavior such as accessing memory that has been updated or causing use-after-free issues.

This possible bug was identified using a static analysis tool developed by myself specifically designed to detect RCU-related issues.

To address this the scan_req->type value is now stored in a local variable scan_req_type while still within the RCU read-side critical section. The scan_req_type is then used after the RCU lock is released ensuring that the type value is safely accessed without violating RCU rules.

Reference

https://git.kernel.org/stable/c/e676e4ea76bbe7f1156d8c326b9b6753849481c2 https://git.kernel.org/stable/c/540138377b22f601f06f55ebfa3ca171dcab471a https://git.kernel.org/stable/c/d18f669461811dfe2915d5554ab2a9834f810013 https://git.kernel.org/stable/c/bff1709b3980bd7f80be6786f64cc9a9ee9e56da