If you have a WiFi device of any type, you should check to see if there is a firmware update available yet (or have your local computer expert/12 year old do it for you). For a list of manufacturers which are affected, and those which have issued updates, see: http://www.kb.cert.org/vuls/byvendor? searchview&Query=FIELD+Reference=22851 9&SearchOrder=4
For more info on the vulnerability, see: https://krebsonsecurity.com/2017/10/what- you-should-know-about-the-krack-wifi- security-weakness/