{"id":"CVE-2026-90344","state":"PUBLISHED","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.","publishedAt":"2026-09-17T16:08:54.311Z","updatedAt":"2026-10-19T09:02:01.149Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"21c3f8f95554feff9bed15703e89adbe582e0383","status":"affected","lessThan":"099aadb2012d7490bc584cc5075ef11cbc33f2c3","versionType":"git"},{"version":"21c3f8f95554feff9bed15703e89adbe582e0383","status":"affected","lessThan":"e7bc5ab93acd1c3f54feeb9fa19ead3530168090","versionType":"git"},{"version":"21c3f8f95554feff9bed15703e89adbe582e0383","status":"affected","lessThan":"eef374088450bb91626e133c7172b8a0e969a522","versionType":"git"},{"version":"21c3f8f95554feff9bed15703e89adbe582e0383","status":"affected","lessThan":"cf57f0a674cc3e3cda1a789359cc1238b61b9d7d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/mac80211/spectmgmt.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.9","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/mac80211/spectmgmt.c"]}],"references":["https://git.kernel.org/stable/c/099aadb2012d7490bc584cc5075ef11cbc33f2c3","https://git.kernel.org/stable/c/e7bc5ab93acd1c3f54feeb9fa19ead3530168090","https://git.kernel.org/stable/c/eef374088450bb91626e133c7172b8a0e969a522","https://git.kernel.org/stable/c/cf57f0a674cc3e3cda1a789359cc1238b61b9d7d"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/90xxx/CVE-2026-90344.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-90344","state":"PUBLISHED","datePublished":"2026-09-17T16:08:54.311Z","dateUpdated":"2026-10-19T09:02:01.149Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.804Z"},"containers":{"cna":{"title":"wifi: mac80211: disconnect on CSA to channel 0","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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"21c3f8f95554feff9bed15703e89adbe582e0383","status":"affected","lessThan":"099aadb2012d7490bc584cc5075ef11cbc33f2c3","versionType":"git"},{"version":"21c3f8f95554feff9bed15703e89adbe582e0383","status":"affected","lessThan":"e7bc5ab93acd1c3f54feeb9fa19ead3530168090","versionType":"git"},{"version":"21c3f8f95554feff9bed15703e89adbe582e0383","status":"affected","lessThan":"eef374088450bb91626e133c7172b8a0e969a522","versionType":"git"},{"version":"21c3f8f95554feff9bed15703e89adbe582e0383","status":"affected","lessThan":"cf57f0a674cc3e3cda1a789359cc1238b61b9d7d","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/mac80211/spectmgmt.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.9","versionType":"semver"},{"version":"6.12.110","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.52","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/mac80211/spectmgmt.c"]}],"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:02:01.149Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"6.12.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"6.18.52"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"7.2.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}