CVE-2026-74661
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.
Affected versions
Linux kernel versions
6.3
and later are affected. Fixed in
6.6.152,
6.12.104,
6.18.45,
7.1.9,
7.2
and their respective stable series.
References
5 totalFrequently asked questions
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What is CVE-2026-74661?
CVE-2026-74661 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.3 onward and has been patched in 6.6.152, 6.12.104, 6.18.45 and others. CVE-2026-74661 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-74661?
Yes. CVE-2026-74661 has been patched. Fixed versions include 6.6.152, 6.12.104, 6.18.45 and others. If you are running Linux kernel 6.3 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-74661 actively exploited?
No. CVE-2026-74661 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.