CVE-2026-90344

CVE CVE-2026-90344EUVD EUVD-2026-82005Published 2026-09-17T16:08:54.000Z

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 0; 21c3f8f95554feff9bed15703e89adbe582e0383 <eef374088450bb91626e133c7172b8a0e969a522; patch: 7.3-rc1; 6.9; 21c3f8f95554feff9bed15703e89adbe582e0383 <e7bc5ab93acd1c3f54feeb9fa19ead3530168090; patch: 7.2.6; patch: 6.18.52; 21c3f8f95554feff9bed15703e89adbe582e0383 <099aadb2012d7490bc584cc5075ef11cbc33f2c3; patch: 6.12.110; 21c3f8f95554feff9bed15703e89adbe582e0383 <cf57f0a674cc3e3cda1a789359cc1238b61b9d7d

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

Linux — Linux

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