https://www.theregister.co.uk/2017/10/17/kracken_patches/

WPA2 Wi-Fi users – ie, almost all of us – have had a troubling Monday with the arrival of research demonstrating a critical design flaw in the technology used to secure our wireless networks. A flaw so bad, it can be exploited by nearby miscreants to potentially snoop on people's internet connections over the air.

However, don't stop using Wi-Fi or WPA2 completely, nor rage quit technology as a whole, no matter how simple this vulnerability is. It's annoying, but there is light at the end of the tunnel.