This just in.
From BleepingComputer:
Mathy Vanhoef, a researcher from the University of Leuven (KU Leuven), has discovered a severe flaw in the Wi-Fi Protected Access II (WPA2) protocol that secures all modern protected Wi-Fi networks.
The flaw affects the WPA2 protocol itself and is not specific to any software or hardware product.
Vanhoef has named his attack KRACK, which stands for Key Reinstallation Attack.
Yikes!
Also from BleepingComputer:
List of Firmware & Driver Updates for KRACK WPA2 Vulnerability