CVE-2026-90344
Description
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.
How to fix
- Linux Linux099aadb2012d7490bc584cc5075ef11cbc33f2c3, e7bc5ab93acd1c3f54feeb9fa19ead3530168090, eef374088450bb91626e133c7172b8a0e969a522, cf57f0a674cc3e3cda1a789359cc1238b61b9d7d or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 21c3f8f95554feff9bed15703e89adbe582e0383 ≤ v < 099aadb2012d7490bc584cc5075ef11cbc33f2c3, 21c3f8f95554feff9bed15703e89adbe582e0383 ≤ v < e7bc5ab93acd1c3f54feeb9fa19ead3530168090, 21c3f8f95554feff9bed15703e89adbe582e0383 ≤ v < eef374088450bb91626e133c7172b8a0e969a522, 21c3f8f95554feff9bed15703e89adbe582e0383 ≤ v < cf57f0a674cc3e3cda1a789359cc1238b61b9d7d, 6.9 | 099aadb2012d7490bc584cc5075ef11cbc33f2c3, e7bc5ab93acd1c3f54feeb9fa19ead3530168090, eef374088450bb91626e133c7172b8a0e969a522, cf57f0a674cc3e3cda1a789359cc1238b61b9d7d |
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