Sacado de Wololo:
if (x <= 4.55) – If you’re on firmware 4.55 or below: Yes, your PS4 is fully Jailbreakable, check here for details.
if (4.55 < x < 5.50) – If you’re on a firmware above 4.55, but strictly below 5.50: There’s a public Webkit exploit you can play with (remember, it won’t bring you anything, as an end user). Additionally, we *know* there exists at least one kernel exploit for your console (Qwertyoruiop’s one, mentioned above), but no hacker has promised any release at the moment. Therefore you’ll often see it mentioned as a “private kernel exploit”.
if (x == 5.50) – If you’re on firmware 5.50: There’s a public Webkit exploit you can play with (Remember, it won’t bring you anything, as an end user). However, there is no public knowledge of a kernel exploit working for your console at the moment, let alone a promise of a release for it.
Traduciendo, hay un kernel exploit (lo que se necesita para acceder a la consola por completo) en versiones inferiores de 5.50, pero no se ha confirmado ninguna fecha de lanzamiento. A esperar.