Description (CNA)
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 (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 79af1f866193de29e65a4dba7d0dab14b0c0ff93 before b7b7d46ec4fa127767931938b282c361c0519af6; affected 79af1f866193de29e65a4dba7d0dab14b0c0ff93 before abe15e643e576459469867758ae9c586a7bab95d; affected 79af1f866193de29e65a4dba7d0dab14b0c0ff93 before 46c223468537a05a404699771cd3e68532dab5e6; affected 79af1f866193de29e65a4dba7d0dab14b0c0ff93 before 2b04d6556964ae9f89819b86a0a7801e39c3aae5 |
| Linux / Linux | affected 4.15; unaffected 0 before 4.15; unaffected 6.12.112 through 6.12.*; unaffected 6.18.54 through 6.18.*; unaffected 7.2.8 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.