CVE-2024-50005 – Linux Kernel RCU Dereference Vuln in mac802154 Scan Worker

CVE ID : CVE-2024-50005

Published : Oct. 21, 2024, 7:15 p.m. | 1 hour, 1 minute ago

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.

Severity: 0.0 | NA

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CVE-2024-50005 – Linux Kernel RCU Dereference Vuln in mac802154 Scan Worker