CVE-2024-26683

In the Linux kernel, the following vulnerability has been resolved: wifi:
cfg80211: detect stuck ECSA element in probe resp We recently added some
validation that we don’t try to connect to an AP that is currently in a
channel switch process, since that might want the channel to be quiet or we
might not be able to connect in time to hear the switching in a beacon.
This was in commit c09c4f31998b (“wifi: mac80211: don’t connect to an AP
while it’s in a CSA process”). However, we promptly got a report that this
caused new connection failures, and it turns out that the AP that we now
cannot connect to is permanently advertising an extended channel switch
announcement, even with quiet. The AP in question was an Asus RT-AC53, with
firmware 3.0.0.4.380_10760-g21a5898. As a first step, attempt to detect
that we’re dealing with such a situation, so mac80211 can use this later.