{"id":"CVE-2026-98891","title":"wifi: mac80211: validate deauth frame length before reason access","summary":"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 actua…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 51092dc769f021e9634474e1bd5a561da477fbdb","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a6ed4c00ccdc15011a73daa2b38af9fc5a2c543e","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 80d1a110e9096b5bf41497f6b151154084862385","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a78689e2beed200d4590318612c74ae25c9408cf","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 7a5ef1fd654d0e90d59aa32c881789c8bcc4125a","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 9df64ad43e1f2c036667bba2bf385e9d7b3af564","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 4a360c6e18dfa9d70006c7247a6a8cc8dfe0d60f","Linux < 5.10.271","Linux < 5.15.222","Linux < 6.1.189","Linux < 6.6.158","Linux < 6.12.111","Linux < 6.18.53","Linux (all versions)"],"published":"2026-10-23","updated":"2026-10-23","sourceUpdated":"2026-10-23T11:37:51.588Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98891","references":[{"url":"https://git.kernel.org/stable/c/51092dc769f021e9634474e1bd5a561da477fbdb"},{"url":"https://git.kernel.org/stable/c/a6ed4c00ccdc15011a73daa2b38af9fc5a2c543e"},{"url":"https://git.kernel.org/stable/c/80d1a110e9096b5bf41497f6b151154084862385"},{"url":"https://git.kernel.org/stable/c/a78689e2beed200d4590318612c74ae25c9408cf"},{"url":"https://git.kernel.org/stable/c/7a5ef1fd654d0e90d59aa32c881789c8bcc4125a"},{"url":"https://git.kernel.org/stable/c/9df64ad43e1f2c036667bba2bf385e9d7b3af564"},{"url":"https://git.kernel.org/stable/c/4a360c6e18dfa9d70006c7247a6a8cc8dfe0d60f"}],"tags":["cve.org"],"ingestedAt":"2026-10-23T13:24:55.580Z","slug":"CVE-2026-98891","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 51092dc769f021e9634474e1bd5a561da477fbdb`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a6ed4c00ccdc15011a73daa2b38af9fc5a2c543e`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 80d1a110e9096b5bf41497f6b151154084862385`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a78689e2beed200d4590318612c74ae25c9408cf`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 7a5ef1fd654d0e90d59aa32c881789c8bcc4125a`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 9df64ad43e1f2c036667bba2bf385e9d7b3af564`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 4a360c6e18dfa9d70006c7247a6a8cc8dfe0d60f`\n- `Linux < 5.10.271`\n- `Linux < 5.15.222`\n- `Linux < 6.1.189`\n- `Linux < 6.6.158`\n- `Linux < 6.12.111`\n- `Linux < 6.18.53`\n- `Linux (all versions)`\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":[]}