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CVE-2026-90344

wifi: mac80211: disconnect on CSA to channel 0

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.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version 21c3f8f95554feff9bed15703e89adbe582e0383
Version < 099aadb2012d7490bc584cc5075ef11cbc33f2c3
Status affected
Version 21c3f8f95554feff9bed15703e89adbe582e0383
Version < e7bc5ab93acd1c3f54feeb9fa19ead3530168090
Status affected
Version 21c3f8f95554feff9bed15703e89adbe582e0383
Version < eef374088450bb91626e133c7172b8a0e969a522
Status affected
Version 21c3f8f95554feff9bed15703e89adbe582e0383
Version < cf57f0a674cc3e3cda1a789359cc1238b61b9d7d
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 6.9
Status affected
Version 0
Version < 6.9
Status unaffected
Version <= 6.12.*
Version 6.12.110
Status unaffected
Version <= 6.18.*
Version 6.18.52
Status unaffected
Version <= 7.2.*
Version 7.2.6
Status unaffected
Version <= *
Version 7.3-rc1
Status unaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.2% 0.101
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
Es wurden noch keine Informationen zu CWE veröffentlicht.
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