[fsf]

You don't need to preemptively change your credit cards, but keep an eye on them. Your analysis of the potential leak is correct. It's possible that one of the bits of memory contained your credit card information, but changing your card just for that is kind of silly without some indication of illicit use.

After all, people happily hand their credit card to restaurant employees, pop it into gas station devices, etc. without worrying too much. Keep an eye on it, but don't fret.

You kind of goofed with the re-used passwords, though :). Kudos for switching to a password manager!