CVE-2026-98182wifi: mac80211: refuse to make a monitor active when it has no queue
Updated under an hour ago ()
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It affects Linux. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 6, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 79af1f866193de29e65a4dba7d0dab14b0c0ff93 before b7b7d46ec4fa127767931938b282c361c0519af6; from 79af1f866193de29e65a4dba7d0dab14b0c0ff93 before abe15e643e576459469867758ae9c586a7bab95d; 79af1f866193de29e65a4dba7d0dab14b0c0ff93 builds before 46c223468537a05a404699771cd3e68532dab5e6; 79af1f866193de29e65a4dba7d0dab14b0c0ff93 builds before 2b04d6556964ae9f89819b86a0a7801e39c3aae5 | CNA record |
References
- https://git.kernel.org/stable/c/b7b7d46ec4fa127767931938b282c361c0519af6
- https://git.kernel.org/stable/c/abe15e643e576459469867758ae9c586a7bab95d
- https://git.kernel.org/stable/c/46c223468537a05a404699771cd3e68532dab5e6
- https://git.kernel.org/stable/c/2b04d6556964ae9f89819b86a0a7801e39c3aae5
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.