{"id":"CVE-2026-90344","title":"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…","summary":"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…","severity":"medium","vendor":"Linux","product":"Linux","affected":["Linux >= 21c3f8f95554feff9bed15703e89adbe582e0383 < 099aadb2012d7490bc584cc5075ef11cbc33f2c3","Linux >= 21c3f8f95554feff9bed15703e89adbe582e0383 < e7bc5ab93acd1c3f54feeb9fa19ead3530168090","Linux >= 21c3f8f95554feff9bed15703e89adbe582e0383 < eef374088450bb91626e133c7172b8a0e969a522","Linux >= 21c3f8f95554feff9bed15703e89adbe582e0383 < cf57f0a674cc3e3cda1a789359cc1238b61b9d7d","Linux 6.9"],"published":"2026-09-17","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:17:33.103","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90344","references":[{"url":"https://git.kernel.org/stable/c/099aadb2012d7490bc584cc5075ef11cbc33f2c3","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/cf57f0a674cc3e3cda1a789359cc1238b61b9d7d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e7bc5ab93acd1c3f54feeb9fa19ead3530168090","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/eef374088450bb91626e133c7172b8a0e969a522","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90344.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-90344"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2536729"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90344"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90344"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-90344.mbox"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ingestedAt":"2026-09-17T16:21:47.817Z","epss":0.002,"epssPercentile":0.09784,"cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":["CWE-1287"],"slug":"CVE-2026-90344","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90344.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":224318,"id":"CVE-2026-90344","ts":1792325085410,"field":"cvss","old":null,"new":"5.5"},{"seq":224317,"id":"CVE-2026-90344","ts":1792325085410,"field":"severity","old":"none","new":"medium"}]}