{"id":"CVE-2026-90344","summary":"wifi: mac80211: disconnect on CSA to channel 0","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: disconnect on CSA to channel 0\n\nThe refactor for the CSA parsing erroneously equates channel\nzero and no information present, leading it to ignore a CSA\non an AP that advertises a switch to that (invalid) channel.\nThis leads to not disconnecting, which we should. For Intel\ndevices, this can lead to a firmware crash.\n\nFix this by using an int type for the channel number as well\nas the opclass, and using a (negative) value that cannot be\nencoded in the element to indicate it's not present.","modified":"2026-09-18T03:48:37.773119480Z","published":"2026-09-17T16:08:54.311Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90344.json","cna_assigner":"Linux"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/099aadb2012d7490bc584cc5075ef11cbc33f2c3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cf57f0a674cc3e3cda1a789359cc1238b61b9d7d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e7bc5ab93acd1c3f54feeb9fa19ead3530168090"},{"type":"WEB","url":"https://git.kernel.org/stable/c/eef374088450bb91626e133c7172b8a0e969a522"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90344.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90344"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"21c3f8f95554feff9bed15703e89adbe582e0383"},{"fixed":"099aadb2012d7490bc584cc5075ef11cbc33f2c3"},{"fixed":"e7bc5ab93acd1c3f54feeb9fa19ead3530168090"},{"fixed":"eef374088450bb91626e133c7172b8a0e969a522"},{"fixed":"cf57f0a674cc3e3cda1a789359cc1238b61b9d7d"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90344.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.9.0"},{"fixed":"6.12.110"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.52"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90344.json"}}],"schema_version":"1.9.0"}