This question already has an answer here:
Now that KRACK has been discovered to exploit WPA2, is it still possible to secure my home Wi-Fi network? If so, what steps should I take to secure it against KRACK attacks? Will there now be a need for a new "WPA3" protocol?
The simple answer as shown in the question below is generally to patch it, but in this case, it appears there are no patches yet for certain devices, but it is unclear what devices do and don't have patches available. I am thinking, if there is a patch available, install it, but what do I do if there isn't?
I don't consider this a duplicate of the linked question below because this explores what to do where the patch is not available. There is some good discussion under the linked question as well, and I recommend checking it out: