CVE-2024-50005: mac802154: Fix potential RCU dereference issue in mac802154_scan_worker

First published: Mon Oct 21 2024(Updated: )

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.

Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

• agent/weakness
• agent/references
• agent/title
• agent/type
• agent/description
• agent/first-publish-date
• agent/author
• agent/event
• collector/mitre-cve
• source/MITRE
• collector/nvd-api
• source/NVD
• agent/software-canonical-lookup
• agent/last-modified-date
• agent/severity
• agent/remedy
• agent/softwarecombine
• agent/tags
• vendor/linux
• canonical/linux linux kernel
• version/linux linux kernel/6.5
• version/linux linux kernel/6.7
• version/linux linux kernel/6.11
• version/linux linux kernel/6.12-rc1