CVE-2026-90344
wifi: mac80211: disconnect on CSA to channel 0
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Sep 17, 2026 |
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Affected Versions
Linux / Linux
21c3f8f95554feff9bed15703e89adbe582e0383 < 099aadb2012d7490bc584cc5075ef11cbc33f2c3 21c3f8f95554feff9bed15703e89adbe582e0383 < e7bc5ab93acd1c3f54feeb9fa19ead3530168090 21c3f8f95554feff9bed15703e89adbe582e0383 < eef374088450bb91626e133c7172b8a0e969a522 21c3f8f95554feff9bed15703e89adbe582e0383 < cf57f0a674cc3e3cda1a789359cc1238b61b9d7d
Linux / Linux
6.9
References
git.kernel.org: https://git.kernel.org/stable/c/099aadb2012d7490bc584cc5075ef11cbc33f2c3 git.kernel.org: https://git.kernel.org/stable/c/e7bc5ab93acd1c3f54feeb9fa19ead3530168090 git.kernel.org: https://git.kernel.org/stable/c/eef374088450bb91626e133c7172b8a0e969a522 git.kernel.org: https://git.kernel.org/stable/c/cf57f0a674cc3e3cda1a789359cc1238b61b9d7d