UNKNOWN NVD
CVE-2026-98182
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: refuse to make a monitor active when it has no queue A monitor interface o
In the Linux kernel, the following vulnerability has been resolved:
wifi: mac80211: refuse to make a monitor active when it has no queue
A monitor interface only gets a TXQ if it's created active, and one can't
be added later. Setting the flag on a down interface is still allowed, so
the driver is handed a monitor with no queue. ath9k dereferences it:
BUG: kernel NULL pointer dereference, address: 0000000000000066
RIP: 0010:ath_tx_node_init+0x49/0x170 [ath9k]
ath9k_add_interface+0x10c/0x140 [ath9k]
drv_add_interface+0x54/0x250 [mac80211]
ieee80211_do_open+0x32f/0x800 [mac80211]
Reached with CAP_NET_ADMIN by "iw dev X set monitor active" followed by
"ip link set X up". RTNL is held, so netlink operations block behind it.
Refuse the flag when there is no queue to give.
References
- https://git.kernel.org/stable/c/2b04d6556964ae9f89819b86a0a7801e39c3aae5
- https://git.kernel.org/stable/c/46c223468537a05a404699771cd3e68532dab5e6
- https://git.kernel.org/stable/c/abe15e643e576459469867758ae9c586a7bab95d
- https://git.kernel.org/stable/c/b7b7d46ec4fa127767931938b282c361c0519af6
This unknown severity vulnerability was published on 2026-10-06 via NVD.
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