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.
References5
- git.kernel.org/stable/c/5f26a690e8efa54315e4922368daf54e0b8f5515
- git.kernel.org/stable/c/9d067e581597c462c51fee8a30b51bc48a68c4e1
- git.kernel.org/stable/c/e5fb0e03bc7f45508c182a427357bf6b389a9033
- git.kernel.org/stable/c/e6cd416a899edc912b428c4ba399bd73f516cb31
- git.kernel.org/stable/c/fe820dcc1d8ff77783a9d2bcc93b98c99ac6d517
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 2 · as of 9 November 2026
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