GHSA-GPWQ-PM3V-5V85
Vulnerability from github – Published: 2026-09-17 18:32 – Updated: 2026-09-17 18:32In the Linux kernel, the following vulnerability has been resolved:
wifi: mac80211: disconnect on CSA to channel 0
The refactor for the CSA parsing erroneously equates channel zero and no information present, leading it to ignore a CSA on an AP that advertises a switch to that (invalid) channel. This leads to not disconnecting, which we should. For Intel devices, this can lead to a firmware crash.
Fix this by using an int type for the channel number as well as the opclass, and using a (negative) value that cannot be encoded in the element to indicate it's not present.
{
"affected": [],
"aliases": [
"CVE-2026-90344"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-17T17:17:33Z",
"severity": null
},
"details": "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\u0027s not present.",
"id": "GHSA-gpwq-pm3v-5v85",
"modified": "2026-09-17T18:32:02Z",
"published": "2026-09-17T18:32:02Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90344"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/099aadb2012d7490bc584cc5075ef11cbc33f2c3"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cf57f0a674cc3e3cda1a789359cc1238b61b9d7d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e7bc5ab93acd1c3f54feeb9fa19ead3530168090"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/eef374088450bb91626e133c7172b8a0e969a522"
}
],
"schema_version": "1.4.0",
"severity": []
}
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