Yes, that was the memory glitching attack. But it was a pretty hard exploit to pull off, the required pulse was pretty short and required getting lucky. Nobody

Yes, that was the memory glitching attack. But it was a pretty hard exploit to pull off, the required pulse was pretty short and required getting lucky. Nobody ever developed it into something particularly useful for end users, and it didn't directly enable piracy. While I suspect the unknown person who developed the PSJailbreak exploit did use that attack as a stepping stone towards hacking GameOS, it was not a requirement. And it also could have been done from GameOS once you had kernel level code executing there.