yes, 7.55 has a kernel exploit as well. there are articles on both wololo and hack informer about it. @KiiWii is aware of it too. from my understanding, they're going to redo the webkit portion of the exploit, because that's what's causing 7.55 and 7.02 to be unstable. on wololo, they got the exploit to work on 7.55 for up to five hours before it crashed the system.