This is big, ruckus had better act quickly on this. I also expect them to release patches for some of the older chains of firmware. We have perfectly usable 802.11n access points (7363) in use that are locked to the 9.12.x chain. It would pretty much mean the end of our relationship with ruckus if we were forced to upgrade these for a security patch.
Aruba has released fixes for older versions of firmware but only ones the deem 'under support'. Ruckus doesn't view firmware in the same way but based on the fact that the recommended 22.214.171.124.121 i would expect them to be going back a little way on the firmware list at least to 9.12
My understand is that this issue was something vendors were previously notified about. So, the fact that there doesn't even appear to be a proposed timeline for a fix is not acceptable - especially since some vendors are already releasing patches.