As you are probably aware following the news this morning, a serious flaw has been found in WPA2 implementations on all devices/operating systems.

For further information on this, the white paper highlighting the flaw can be found here:

https://papers.mathyvanhoef.com/ccs2017.pdf

A synopsis on the problem here (good place to start):

https://www.krackattacks.com

And a higher level description by the Guardian Newspaper here:

https://theguardian.com/technology/2017/oct/16/wpa2-wifi-security-vulnerable-hacking-us-government-warns