The WPA2 bugs was publicly disclosed by security researcher Mathy Vanhoef, who demoed in a video how GNU/Linux and Android operating systems are vulnerable to the Key Reinstallation Attack or KRACK, allowing hackers to obtain sensitive information like credit card numbers, passwords and usernames, etc. On Linux, the bug is present in the wpa_supplicant package, which was already patched in Debian, Ubuntu, Linux Mint, elementary OS, Arch Linux, Solus, and many other popular GNU/Linux distros, and it’s coming very soon to the stable repositories of Fedora Linux too, so you need to update your system as soon as possible.