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fail0verflow presents a detailed write up on the kernel exploitation that was used for 4.05 systems; utilised also by Chaitin Tech and potentially many more. Exploit patched in 4.06.
zecoxao releases a tutorial on method for 1.76 systems.
The MTX key is a modchip enabling the playing of backup games via unlimited game sharing for firmware 4.72. Allegedly, the designs for the chip were stolen from Freeplex and the vulnerabilities were known to the community for some time. The modchip was patched in 4.73, after exposure, giving it an active life of only a few weeks.
Achieved by qwertyuiop. He mentions a possible release when patched. Has commented that the ideal would be to keep one set of exploits for private research.
Developed by qwertyuiop. Can be found at rce.party/ps4/. Apparently patched in 4.50.
Achieved via the running of Linux. No plan to release exploit.
Firmware 4.01 jailbreak presented at Geekpwn. First time a full exploit has been shown publically since firmware 1.76. No release.
The exploit developed for PS Vita systems was ported by Fire30 to exploit the WebKit on 3.55 firmware.
Further, kR105 integrates support for booting Linux from PS4-Playground tools for 1.76 systems.
Files are provided to run Linux on PS4 systems. No disclosure of what system firmware was being run; speculation suggests 1.76.
A method was developed that allowed the copying of PS4 game licenses enabling the ability to play backup games. cfwprophet claims that this method will brick systems running firmware 2.51.
Developers nas and proxima extended Vita WebKit exploit to work on PS4s with firmware 1.76.