CVE-2026-68126

In the Linux kernel, the following vulnerability has been resolved:

mac802154: hold an interface reference across the scan worker

mac802154_scan_worker() captures the scanning sub-interface under RCU

and then keeps dereferencing sdata->dev after rcu_read_unlock() and

outside the rtnl -- in the failure traces, in

mac802154_transmit_beacon_req() (skb->dev = sdata->dev), and in the

end_scan cleanup. Nothing keeps that netdev alive across the worker

iteration.

A concurrent DEL_INTERFACE or PHY removal can unregister the interface

once the worker drops the rtnl between its two drv_set_channel()

sections. unregister_netdevice() frees the netdev asynchronously from

netdev_run_todo() with the rtnl already dropped, so neither holding the

rtnl nor the per-PHY IEEE802154_IS_SCANNING flag prevents a stale worker

iteration from dereferencing the freed netdev -- a KASAN

slab-use-after-free, reachable by racing TRIGGER_SCAN against

DEL_INTERFACE (both CAP_NET_ADMIN).

Pin the netdev with netdev_hold() while the RCU read lock is still held,

and release it at every worker exit.