The summary gives the example of securing your neighbors roof when a tornado is about to hit. Possible laws to break to do this, are "breaking and entering" or "trespassing".

Note that a lot of these laws state that care must be taken not to break laws unnecessarily. Bricking IOT devices that can be used for DDOS-attacks may be a step too far.

And strictly, in the case of patching a server under negotiorum gestio, you have not broken any laws: It is not unlawful computer intrusion when you have implicit permission of the owner of a device (the same goes for entering your neighbors house when they are on vacation, and have accidentally left a pot of milk to boil on the stove).

But I guess such far-reaching Good Samaritan laws are very foreign to the US, since there, off-duty doctors are sued for performing a painful Heimlich maneuver.