{"api_version":"1","generated_at":"2026-09-18T18:31:48+00:00","cve":"CVE-2026-90344","urls":{"html":"https://cve.report/CVE-2026-90344","api":"https://cve.report/api/cve/CVE-2026-90344.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-90344","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-90344"},"summary":{"title":"wifi: mac80211: disconnect on CSA to channel 0","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-17 17:17:33","updated_at":"2026-09-17 17:17:33"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/099aadb2012d7490bc584cc5075ef11cbc33f2c3","name":"https://git.kernel.org/stable/c/099aadb2012d7490bc584cc5075ef11cbc33f2c3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/cf57f0a674cc3e3cda1a789359cc1238b61b9d7d","name":"https://git.kernel.org/stable/c/cf57f0a674cc3e3cda1a789359cc1238b61b9d7d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e7bc5ab93acd1c3f54feeb9fa19ead3530168090","name":"https://git.kernel.org/stable/c/e7bc5ab93acd1c3f54feeb9fa19ead3530168090","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/eef374088450bb91626e133c7172b8a0e969a522","name":"https://git.kernel.org/stable/c/eef374088450bb91626e133c7172b8a0e969a522","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90344","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90344","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 21c3f8f95554feff9bed15703e89adbe582e0383 099aadb2012d7490bc584cc5075ef11cbc33f2c3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 21c3f8f95554feff9bed15703e89adbe582e0383 e7bc5ab93acd1c3f54feeb9fa19ead3530168090 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 21c3f8f95554feff9bed15703e89adbe582e0383 eef374088450bb91626e133c7172b8a0e969a522 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 21c3f8f95554feff9bed15703e89adbe582e0383 cf57f0a674cc3e3cda1a789359cc1238b61b9d7d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.9","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.9 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.110 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.52 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.6 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/mac80211/spectmgmt.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"099aadb2012d7490bc584cc5075ef11cbc33f2c3","status":"affected","version":"21c3f8f95554feff9bed15703e89adbe582e0383","versionType":"git"},{"lessThan":"e7bc5ab93acd1c3f54feeb9fa19ead3530168090","status":"affected","version":"21c3f8f95554feff9bed15703e89adbe582e0383","versionType":"git"},{"lessThan":"eef374088450bb91626e133c7172b8a0e969a522","status":"affected","version":"21c3f8f95554feff9bed15703e89adbe582e0383","versionType":"git"},{"lessThan":"cf57f0a674cc3e3cda1a789359cc1238b61b9d7d","status":"affected","version":"21c3f8f95554feff9bed15703e89adbe582e0383","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/mac80211/spectmgmt.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.9"},{"lessThan":"6.9","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.110","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.52","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.110","versionStartIncluding":"6.9","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.52","versionStartIncluding":"6.9","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.6","versionStartIncluding":"6.9","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"6.9","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-09-17T16:08:54.311Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/099aadb2012d7490bc584cc5075ef11cbc33f2c3"},{"url":"https://git.kernel.org/stable/c/e7bc5ab93acd1c3f54feeb9fa19ead3530168090"},{"url":"https://git.kernel.org/stable/c/eef374088450bb91626e133c7172b8a0e969a522"},{"url":"https://git.kernel.org/stable/c/cf57f0a674cc3e3cda1a789359cc1238b61b9d7d"}],"title":"wifi: mac80211: disconnect on CSA to channel 0","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-90344","datePublished":"2026-09-17T16:08:54.311Z","dateReserved":"2026-09-11T19:38:34.804Z","dateUpdated":"2026-09-17T16:08:54.311Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-17 17:17:33","lastModifiedDate":"2026-09-17 17:17:33","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"90344","Ordinal":"1","Title":"wifi: mac80211: disconnect on CSA to channel 0","CVE":"CVE-2026-90344","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"90344","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"wifi: mac80211: disconnect on CSA to channel 0"}]}}}