CyberRota Analysis
AI-GeneratedThe vulnerability affects the Linux kernel's mac802154 module, specifically in the beacon worker function, where a use-after-free condition can occur due to improper handling of RCU read locks. This flaw allows a running beacon worker to dereference a freed netdev private area after the interface has been torn down, potentially leading to system instability or exploitation. Organizations utilizing Linux systems with mac802154 support should prioritize this issue to mitigate risks associated with network interface management.
Original NVD Description
In the Linux kernel, the following vulnerability has been resolved: mac802154: fix netdev use-after-free in beacon worker mac802154_beacon_worker() reads local->beacon_req under RCU and derives the sub-interface from the request, but then drops the RCU read lock and continues to use both sdata and the embedded wpan_dev. mac802154_stop_beacons_locked() cancels only pending beacon work, clears local->beacon_req and frees the request. A beacon worker that is already running can therefore continue after interface teardown and dereference the freed netdev private area. The scan worker already pins the netdev before leaving RCU. Apply the same lifetime rule to the beacon worker: take a netdev reference while the request is still protected by RCU, and release it on all paths that continue after the reference is acquired.