{"id":"CVE-2026-98182","summary":"wifi: mac80211: refuse to make a monitor active when it has no queue","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: refuse to make a monitor active when it has no queue\n\nA monitor interface only gets a TXQ if it's created active, and one can't\nbe added later. Setting the flag on a down interface is still allowed, so\nthe driver is handed a monitor with no queue. ath9k dereferences it:\n\n  BUG: kernel NULL pointer dereference, address: 0000000000000066\n  RIP: 0010:ath_tx_node_init+0x49/0x170 [ath9k]\n   ath9k_add_interface+0x10c/0x140 [ath9k]\n   drv_add_interface+0x54/0x250 [mac80211]\n   ieee80211_do_open+0x32f/0x800 [mac80211]\n\nReached with CAP_NET_ADMIN by \"iw dev X set monitor active\" followed by\n\"ip link set X up\". RTNL is held, so netlink operations block behind it.\n\nRefuse the flag when there is no queue to give.","modified":"2026-10-08T02:52:52.866864446Z","published":"2026-10-06T08:44:25.219Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98182.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/2b04d6556964ae9f89819b86a0a7801e39c3aae5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/46c223468537a05a404699771cd3e68532dab5e6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/abe15e643e576459469867758ae9c586a7bab95d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b7b7d46ec4fa127767931938b282c361c0519af6"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98182.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98182"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"79af1f866193de29e65a4dba7d0dab14b0c0ff93"},{"fixed":"b7b7d46ec4fa127767931938b282c361c0519af6"},{"fixed":"abe15e643e576459469867758ae9c586a7bab95d"},{"fixed":"46c223468537a05a404699771cd3e68532dab5e6"},{"fixed":"2b04d6556964ae9f89819b86a0a7801e39c3aae5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98182.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.15.0"},{"fixed":"6.12.112"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.54"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.8"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98182.json"}}],"schema_version":"1.9.0"}