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.
Metrics
No CVSS score has been published yet.
Affected software
Source: the vendor's advisory (CNA). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 21c3f8f95554feff9bed15703e89adbe582e0383, < 099aadb2012d7490bc584cc5075ef11cbc33f2c3; >= 21c3f8f95554feff9bed15703e89adbe582e0383, < e7bc5ab93acd1c3f54feeb9fa19ead3530168090; >= 21c3f8f95554feff9bed15703e89adbe582e0383, < eef374088450bb91626e133c7172b8a0e969a522; >= 21c3f8f95554feff9bed15703e89adbe582e0383, < cf57f0a674cc3e3cda1a789359cc1238b61b9d7d |
| Linux | Linux | 6.9 |
References
Timeline
- Published
- Sep 17, 2026
- Last modified
- Oct 19, 2026
- NVD status
- Received