Team PS4NoBd, led by developer CelesteBlue, have released PS4Brew 4.74, a port of the 5.05 Jailbreak, for firmware 4.74. The hacker credits a huge chunk of the work to famous PS4 developer SpecterDev (4.74 JOP chain + ROP Kdumper), as well as from Zecoxao (code + 4.74 patches implementation).
Why a kernel exploit for 4.74 now?
If you’re familiar with the PS4 scene, you already know that the latest exploitable firmware is firmware 5.05. In general, at this point we recommend users on a firmware below that to simply upgrade to 5.05, and Jailbreak the PS4 from there.
But it turns out that folks with a broken BluRay drive cannot upgrade past their current firmware (in this case, 4.74). Error code CE-35888-2 has been mentioned as one of the errors you can get that indicates a broken (or improperly “married”) Blu Ray drive.
PS4Brew 4.74 is therefore here to help these folks enjoy the kernel exploit nonetheless.
If you are on an already hackable firmware such as 4.55, or 5.05, CelesteBlue recommends staying on your current firmware.
The hacker also hinted at more features to come for people with BD drive issues.
Anyone with a broken BD drive PS4 on FW <= 5.07 please contact me.