An anonymous reader writes: Two years after the PlayStation 4 was released, and two weeks after it was jailbroken, a group of hackers has now successfully installed Linux on it. "...it appears that the fail0verflow team utilized a WebKit bug similar to the one recently documented by GitHub user CTurt and then took things up a notch. CTurt's workaround focuses on the PlayStation 4's Webkit browser, which is tricked into freeing processes from the core of the console's operating system by an improvised webpage. The PS4 is powered by Sony's Orbis OS, which is based on a Unix-like software called FreeBSD. With a route into the console's system, fail0verflow then identified weaknesses in the PlayStation 4's GPU. It specifically called out engineers from semiconductor company Marvell, accusing them of 'smoking some real good stuff' when they designed the PlayStation 4's southbridge chip."