CVE-2026-74661
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.
How to fix
- Linux Linuxfe820dcc1d8ff77783a9d2bcc93b98c99ac6d517, e5fb0e03bc7f45508c182a427357bf6b389a9033, e6cd416a899edc912b428c4ba399bd73f516cb31, 9d067e581597c462c51fee8a30b51bc48a68c4e1, 5f26a690e8efa54315e4922368daf54e0b8f5515 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 3accf4762734a69ebd03cba989249c78ac7dfc7e ≤ v < fe820dcc1d8ff77783a9d2bcc93b98c99ac6d517, 3accf4762734a69ebd03cba989249c78ac7dfc7e ≤ v < e5fb0e03bc7f45508c182a427357bf6b389a9033, 3accf4762734a69ebd03cba989249c78ac7dfc7e ≤ v < e6cd416a899edc912b428c4ba399bd73f516cb31, 3accf4762734a69ebd03cba989249c78ac7dfc7e ≤ v < 9d067e581597c462c51fee8a30b51bc48a68c4e1, 3accf4762734a69ebd03cba989249c78ac7dfc7e ≤ v < 5f26a690e8efa54315e4922368daf54e0b8f5515, 6.3 | fe820dcc1d8ff77783a9d2bcc93b98c99ac6d517, e5fb0e03bc7f45508c182a427357bf6b389a9033, e6cd416a899edc912b428c4ba399bd73f516cb31, 9d067e581597c462c51fee8a30b51bc48a68c4e1, 5f26a690e8efa54315e4922368daf54e0b8f5515 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.