CVE-2026-74661mac802154: fix netdev use-after-free in beacon worker
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Aug 25, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 3accf4762734a69ebd03cba989249c78ac7dfc7e before fe820dcc1d8ff77783a9d2bcc93b98c99ac6d517; from 3accf4762734a69ebd03cba989249c78ac7dfc7e before e5fb0e03bc7f45508c182a427357bf6b389a9033; from 3accf4762734a69ebd03cba989249c78ac7dfc7e before e6cd416a899edc912b428c4ba399bd73f516cb31; from 3accf4762734a69ebd03cba989249c78ac7dfc7e before 9d067e581597c462c51fee8a30b51bc48a68c4e1; from 3accf4762734a69ebd03cba989249c78ac7dfc7e before 5f26a690e8efa54315e4922368daf54e0b8f5515 | CNA record |
References
- https://git.kernel.org/stable/c/fe820dcc1d8ff77783a9d2bcc93b98c99ac6d517
- https://git.kernel.org/stable/c/e5fb0e03bc7f45508c182a427357bf6b389a9033
- https://git.kernel.org/stable/c/e6cd416a899edc912b428c4ba399bd73f516cb31
- https://git.kernel.org/stable/c/9d067e581597c462c51fee8a30b51bc48a68c4e1
- https://git.kernel.org/stable/c/5f26a690e8efa54315e4922368daf54e0b8f5515
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.