{"id":"CVE-2026-98891","state":"PUBLISHED","title":"wifi: mac80211: validate deauth frame length before reason access","description":"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.","publishedAt":"2026-10-23T11:37:51.588Z","updatedAt":"2026-10-26T06:56:16.835Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"c9c99f8938e41b878802d5d8481d6f7a212515b0","status":"affected","lessThan":"51092dc769f021e9634474e1bd5a561da477fbdb","versionType":"git"},{"version":"c9c99f8938e41b878802d5d8481d6f7a212515b0","status":"affected","lessThan":"a6ed4c00ccdc15011a73daa2b38af9fc5a2c543e","versionType":"git"},{"version":"c9c99f8938e41b878802d5d8481d6f7a212515b0","status":"affected","lessThan":"80d1a110e9096b5bf41497f6b151154084862385","versionType":"git"},{"version":"c9c99f8938e41b878802d5d8481d6f7a212515b0","status":"affected","lessThan":"a78689e2beed200d4590318612c74ae25c9408cf","versionType":"git"},{"version":"c9c99f8938e41b878802d5d8481d6f7a212515b0","status":"affected","lessThan":"7a5ef1fd654d0e90d59aa32c881789c8bcc4125a","versionType":"git"},{"version":"c9c99f8938e41b878802d5d8481d6f7a212515b0","status":"affected","lessThan":"9df64ad43e1f2c036667bba2bf385e9d7b3af564","versionType":"git"},{"version":"c9c99f8938e41b878802d5d8481d6f7a212515b0","status":"affected","lessThan":"4a360c6e18dfa9d70006c7247a6a8cc8dfe0d60f","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/mac80211/mlme.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.2","versionType":"semver"},{"version":"5.10.271","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.222","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.189","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.111","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.53","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/mac80211/mlme.c"]}],"references":["https://git.kernel.org/stable/c/51092dc769f021e9634474e1bd5a561da477fbdb","https://git.kernel.org/stable/c/a6ed4c00ccdc15011a73daa2b38af9fc5a2c543e","https://git.kernel.org/stable/c/80d1a110e9096b5bf41497f6b151154084862385","https://git.kernel.org/stable/c/a78689e2beed200d4590318612c74ae25c9408cf","https://git.kernel.org/stable/c/7a5ef1fd654d0e90d59aa32c881789c8bcc4125a","https://git.kernel.org/stable/c/9df64ad43e1f2c036667bba2bf385e9d7b3af564","https://git.kernel.org/stable/c/4a360c6e18dfa9d70006c7247a6a8cc8dfe0d60f"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98891.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98891","state":"PUBLISHED","datePublished":"2026-10-23T11:37:51.588Z","dateUpdated":"2026-10-26T06:56:16.835Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.378Z"},"containers":{"cna":{"title":"wifi: mac80211: validate deauth frame length before reason access","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"c9c99f8938e41b878802d5d8481d6f7a212515b0","status":"affected","lessThan":"51092dc769f021e9634474e1bd5a561da477fbdb","versionType":"git"},{"version":"c9c99f8938e41b878802d5d8481d6f7a212515b0","status":"affected","lessThan":"a6ed4c00ccdc15011a73daa2b38af9fc5a2c543e","versionType":"git"},{"version":"c9c99f8938e41b878802d5d8481d6f7a212515b0","status":"affected","lessThan":"80d1a110e9096b5bf41497f6b151154084862385","versionType":"git"},{"version":"c9c99f8938e41b878802d5d8481d6f7a212515b0","status":"affected","lessThan":"a78689e2beed200d4590318612c74ae25c9408cf","versionType":"git"},{"version":"c9c99f8938e41b878802d5d8481d6f7a212515b0","status":"affected","lessThan":"7a5ef1fd654d0e90d59aa32c881789c8bcc4125a","versionType":"git"},{"version":"c9c99f8938e41b878802d5d8481d6f7a212515b0","status":"affected","lessThan":"9df64ad43e1f2c036667bba2bf385e9d7b3af564","versionType":"git"},{"version":"c9c99f8938e41b878802d5d8481d6f7a212515b0","status":"affected","lessThan":"4a360c6e18dfa9d70006c7247a6a8cc8dfe0d60f","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/mac80211/mlme.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.2","versionType":"semver"},{"version":"5.10.271","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.222","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.189","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.111","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.53","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/mac80211/mlme.c"]}],"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-26T06:56:16.835Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"5.10.271"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"5.15.222"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"6.1.189"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"6.6.158"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"6.12.111"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"6.18.53"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}