Description
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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
79af1f866193de29e65a4dba7d0dab14b0c0ff93 to < b7b7d46ec4fa127767931938b282c361c0519af6affected79af1f866193de29e65a4dba7d0dab14b0c0ff93 to < abe15e643e576459469867758ae9c586a7bab95daffected79af1f866193de29e65a4dba7d0dab14b0c0ff93 to < 46c223468537a05a404699771cd3e68532dab5e6affected79af1f866193de29e65a4dba7d0dab14b0c0ff93 to < 2b04d6556964ae9f89819b86a0a7801e39c3aae5affected
Linux Linux
Default version status: affected
4.15affected0 to < 4.15unaffected6.12.112 to ≤ 6.12.*unaffected6.18.54 to ≤ 6.18.*unaffected7.2.8 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected