After teasing the exploit recently on Discord, SpecterDev has officially released his kernel exploit for PS4 firmware version 4.05.

Official announcement

Hope everyone had a Merry Christmas! Here's the 4.05 kernel exploit, fully implemented. Enjoy! Write-up coming soon! https://t.co/MQR0lzCu9Y

— Specter (@SpecterDev) December 27, 2017

Code:
https://github.com/Cryptogenic/PS4-4.05-Kernel-Exploit

TLDNR (From GitHub):

In this project you will find a full implementation of the "namedobj" kernel exploit for the PlayStation 4 on 4.05. It will allow you to run arbitrary code as kernel, to allow jailbreaking and kernel-level modifications to the system. This release however, does not contain any code related to defeating anti-piracy mechanisms or running homebrew. This exploit does include a loader that listens for payloads on port 9020 and will execute them upon receival.

In case you want to get a PS4 <=4.05
https://gbatemp.net/threads/suggestion-ps4-bundles-firmware-list.487337/

UPDATE:

after @SpecterDev released his exploit, i'll prepare stuff within a couple of days, someone need to backport it from 4.55 to 4.05, not hard to do. not sure if it will be a write-up or just snippets of code, let's see

— Aleksei Kulaev (@flat_z) December 27, 2017

 

[Ronhero]

Saw this a few min ago on Discord

This though

https://twitter.com/flat_z/status/945925011445108736

 

[Scarecrow B]

Saw this a few min ago on Discord

This though

https://twitter.com/flat_z/status/945925011445108736

Hopefully things will start getting interesting for the PS4 scene.

 

[nikeymikey]

I will be updating my 2.?? PS4 promptly

 

[ankit]

So now can we play backups on PS4 now or need to wait for fully functional game playing exploit

 

[Nyteshade714]

Never though I'd actually be happy about the fact that my PS4 has been in storage for a few months, but that means that once I finally manage to ship it to my new place I'll have a low enough firmware for this! Congrats to Specter and everyone else responsible!

Still got my fingers crossed for a ban-safe way to play online and keep the exploit by the time Monster Hunter World comes out.

 

[gnmmarechal]

Wonder what my PS4 is on rn.

 

[Haider Raza]

I don't know much about PS4 hacks but can we play ps4 backups with this hack?

 

[Deleted-355425]

waiting on 4.50 kernel

 

[ital]

Nope.

 

[Nezztor]

He say the anti-piracy systems are not hacked on his release ,you have to wait for someone to add that feature

 

[leon315]

CHAMPAGNE!!!

AND HAPPY NEW YEAR FOLKS

 

[ploggy]

Great news.. Gutted being on 4.50 but this can only mean good things for the PS4 Scene
Thank You Specter and Merry Christmas Bring on 2018!

Related https://twitter.com/flat_z/status/945925011445108736

after @SpecterDev released his exploit, i'll prepare stuff within a couple of days, someone need to backport it from 4.55 to 4.05, not hard to do. not sure if it will be a write-up or just snippets of code, let's see

 

[smurf]

I'm on 3.55, I'll wait for good news!

 

[FreePlayFlorida]

good news for sure, shame my dust magnet is sitting on 4.50, heres hoping great work to those involved thou

 

[peteruk]

waiting on 4.50 kernel

haha I'm waiting on 5.0 but could be a long wait mate

 

[Haider Raza]

What is this hack for? What can I do with it?

 

[Axido]

Any word on PS4 Pro compatibility? This would be my time to hunt down a unit on 3.70, if it is supported.

 

[Arnold101]

i have 4.07 i can't do nothing for now?

 

[leon315]

Never though I'd actually be happy about the fact that my PS4 has been in storage for a few months, but that means that once I finally manage to ship it to my new place I'll have a low enough firmware for this! Congrats to Specter and everyone else responsible!

Still got my fingers crossed for a ban-safe way to play online and keep the exploit by the time Monster Hunter World comes out.

I have a ps3 and I was banned from psn because of cfw, so don't expect anything safe soon