High · published October 6, 2026
In the Linux kernel, the following vulnerability has been resolved:
wifi: virt_wifi: don't transfer operstate before register
virt_wifi_newlink() calls netif_stacked_transfer_operstate() before
register_netdevice(). If the lower device is dormant, that queues the
new netdev on lweventlist while it is still uninitialized. If
registration fails after that, for example because of an invalid name
such as "bad/name", free_netdev() immediately frees the object. A
later linkwatch_fire_event() then use-after-frees the list entry.
Move the transfer to after netdev_upper_dev_link(), as macvlan and
ipvlan already do.