{"id":"CVE-2025-21909","title":"wifi: nl80211: reject cooked mode if it is set along with other flags","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: nl80211: reject cooked mode if it is set along with other flags\n\nIt is possible to set both MONITOR_FLAG_COOK_FRAMES and MONITOR_FLAG_ACTIVE\nflags simultaneously …","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 66f7ac50ed7cc5c19a62bc97e8f6e7891004a03a < 5ea856d93794c4afa5542defd8c61f2708dc245a","Linux >= 66f7ac50ed7cc5c19a62bc97e8f6e7891004a03a < 351eb7ac53ff1cd94d893c0c4534ced2f36ae7d7","Linux >= 66f7ac50ed7cc5c19a62bc97e8f6e7891004a03a < cd1bdcb77fdc03c253137e55bae10551b3481461","Linux >= 66f7ac50ed7cc5c19a62bc97e8f6e7891004a03a < 236f41ca728f23210b31ed2d1d8a6df575a4b2d6","Linux >= 66f7ac50ed7cc5c19a62bc97e8f6e7891004a03a < ebebbb0eded2ed9a1abfa31962f6fb699e6abce7","Linux >= 66f7ac50ed7cc5c19a62bc97e8f6e7891004a03a < 521e55c2b0d6028861ac0a2d06aa57bb0e3ac486","Linux >= 66f7ac50ed7cc5c19a62bc97e8f6e7891004a03a < ac4860141300581d3e2f6c6dafa37220f7ea9f65","Linux >= 66f7ac50ed7cc5c19a62bc97e8f6e7891004a03a < 49f27f29446a5bfe633dd2cc0cfebd48a1a5e77f","Linux 2.6.26"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T20:36:38.030485Z"},"published":"2025-04-01","updated":"2026-11-05","sourceUpdated":"2026-11-05T20:41:47.419Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-21909","references":[{"url":"https://git.kernel.org/stable/c/5ea856d93794c4afa5542defd8c61f2708dc245a"},{"url":"https://git.kernel.org/stable/c/351eb7ac53ff1cd94d893c0c4534ced2f36ae7d7"},{"url":"https://git.kernel.org/stable/c/cd1bdcb77fdc03c253137e55bae10551b3481461"},{"url":"https://git.kernel.org/stable/c/236f41ca728f23210b31ed2d1d8a6df575a4b2d6"},{"url":"https://git.kernel.org/stable/c/ebebbb0eded2ed9a1abfa31962f6fb699e6abce7"},{"url":"https://git.kernel.org/stable/c/521e55c2b0d6028861ac0a2d06aa57bb0e3ac486"},{"url":"https://git.kernel.org/stable/c/ac4860141300581d3e2f6c6dafa37220f7ea9f65"},{"url":"https://git.kernel.org/stable/c/49f27f29446a5bfe633dd2cc0cfebd48a1a5e77f"}],"tags":["cve.org"],"epss":0.00178,"epssPercentile":0.07433,"ingestedAt":"2026-11-05T22:38:31.853Z","slug":"CVE-2025-21909","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nwifi: nl80211: reject cooked mode if it is set along with other flags\n\nIt is possible to set both MONITOR_FLAG_COOK_FRAMES and MONITOR_FLAG_ACTIVE\nflags simultaneously on the same monitor interface from the userspace. This\ncauses a sub-interface to be created with no IEEE80211_SDATA_IN_DRIVER bit\nset because the monitor interface is in the cooked state and it takes\nprecedence over all other states. When the interface is then being deleted\nthe kernel calls WARN_ONCE() from check_sdata_in_driver() because of missing\nthat bit.\n\nFix this by rejecting MONITOR_FLAG_COOK_FRAMES if it is set along with\nother flags.\n\nFound by Linux Verification Center (linuxtesting.org) with Syzkaller.\n\n## Affected\n\n- `Linux >= 66f7ac50ed7cc5c19a62bc97e8f6e7891004a03a < 5ea856d93794c4afa5542defd8c61f2708dc245a`\n- `Linux >= 66f7ac50ed7cc5c19a62bc97e8f6e7891004a03a < 351eb7ac53ff1cd94d893c0c4534ced2f36ae7d7`\n- `Linux >= 66f7ac50ed7cc5c19a62bc97e8f6e7891004a03a < cd1bdcb77fdc03c253137e55bae10551b3481461`\n- `Linux >= 66f7ac50ed7cc5c19a62bc97e8f6e7891004a03a < 236f41ca728f23210b31ed2d1d8a6df575a4b2d6`\n- `Linux >= 66f7ac50ed7cc5c19a62bc97e8f6e7891004a03a < ebebbb0eded2ed9a1abfa31962f6fb699e6abce7`\n- `Linux >= 66f7ac50ed7cc5c19a62bc97e8f6e7891004a03a < 521e55c2b0d6028861ac0a2d06aa57bb0e3ac486`\n- `Linux >= 66f7ac50ed7cc5c19a62bc97e8f6e7891004a03a < ac4860141300581d3e2f6c6dafa37220f7ea9f65`\n- `Linux >= 66f7ac50ed7cc5c19a62bc97e8f6e7891004a03a < 49f27f29446a5bfe633dd2cc0cfebd48a1a5e77f`\n- `Linux 2.6.26`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}