{"id":"CVE-2026-98891","summary":"wifi: mac80211: validate deauth frame length before reason access","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: validate deauth frame length before reason access\n\nieee80211_rx_mgmt_deauth() reads the deauth reason code before checking\nthat the fixed field is actually present in the received frame.\n\nValidate the deauth frame length first and only then read the reason\ncode.","modified":"2026-11-04T14:27:20.645752418Z","published":"2026-10-23T11:37:51.588Z","related":["SUSE-SU-2026:5091-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98891.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/4a360c6e18dfa9d70006c7247a6a8cc8dfe0d60f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/51092dc769f021e9634474e1bd5a561da477fbdb"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7a5ef1fd654d0e90d59aa32c881789c8bcc4125a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/80d1a110e9096b5bf41497f6b151154084862385"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9df64ad43e1f2c036667bba2bf385e9d7b3af564"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a6ed4c00ccdc15011a73daa2b38af9fc5a2c543e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a78689e2beed200d4590318612c74ae25c9408cf"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98891.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98891"},{"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":"c9c99f8938e41b878802d5d8481d6f7a212515b0"},{"fixed":"51092dc769f021e9634474e1bd5a561da477fbdb"},{"fixed":"a6ed4c00ccdc15011a73daa2b38af9fc5a2c543e"},{"fixed":"80d1a110e9096b5bf41497f6b151154084862385"},{"fixed":"a78689e2beed200d4590318612c74ae25c9408cf"},{"fixed":"7a5ef1fd654d0e90d59aa32c881789c8bcc4125a"},{"fixed":"9df64ad43e1f2c036667bba2bf385e9d7b3af564"},{"fixed":"4a360c6e18dfa9d70006c7247a6a8cc8dfe0d60f"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-98891.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.2.0"},{"fixed":"5.10.271"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.222"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.189"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.158"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.111"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.53"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-98891.json"}}],"schema_version":"1.9.2"}