CVE-2026-90344wifi: mac80211: disconnect on CSA to channel 0
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In 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.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 21c3f8f95554feff9bed15703e89adbe582e0383 before 099aadb2012d7490bc584cc5075ef11cbc33f2c3; from 21c3f8f95554feff9bed15703e89adbe582e0383 before e7bc5ab93acd1c3f54feeb9fa19ead3530168090; from 21c3f8f95554feff9bed15703e89adbe582e0383 before eef374088450bb91626e133c7172b8a0e969a522; from 21c3f8f95554feff9bed15703e89adbe582e0383 before cf57f0a674cc3e3cda1a789359cc1238b61b9d7d | CNA record |
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
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.