PS3 System Software Update v4.21 is Released, Details Available

94w ago - Last week Sony released PS3 Firmware 4.20, and today they have announced via Twitter that PlayStation 3 System Software version 4.21 is incoming with details below.

Download: PS3 Firmware 4.21 Update (US) / PS3 Firmware 4.21 Update (EU) / Core_OS_Package.PKG 4.21 (Unpacked) by doggie721 / PS3 LV1 Dump from 4.21 / PS3 LV1 Dump from 4.21 (Mirror) / PS3 LV2 Dump from 4.21 / LV2 Dumper for CFW 4.21 by zadow28

Currently it is an optional (non-mandatory) PS3 update, and below is what Sony stated in their Tweet on the revision, to quote:

"PS3 system software update 4.21 will be released soon. It's a minor, optional update that improves software stability."

As always, we will update this post as more details are available!

From Sony's page: Find out what features are included in PS3 system software update 4.21.

An update to the PS3 system software was released on 5 July 2012. If you update your PS3 system, the system software version will be 4.21 and the following features will be updated.

In order to download PS3 system software version 4.21, you will need a minimum 200MB of free space on either the PS3 Hard Disk Drive (System Update) or on removable storage media (PC Update).

Main features in system software update version 4.21

  • System stability during use of some PS3 software has been improved.

Finally, from zadow28: LV1 Dump for PS3 FW 4.21 released! Now this wasn't easy, but after some days I managed to dump the lv2. I have managed to dump the lv1 also, and that is more important. Made two links since this isn't something sony likes. Regards.

Here is the lv2_dump from 4.21 (linked above). Sycall table was found at offset 0x346390.

No its not for patching the kernel, but it would help getting there. This is an dump from the kernel and lv2 functions. So in an way its the lv2 kernel decrypted.remember the one we cant decrypt yet.

Together with the sycall table you would now see where the correct syscalls would be on ofw 4.21. Therefore exploiting it. Also here (above) is an lv2 dumper for cfw 4.21 i converted.. usb in the right slot. regards to the orgiginal creator. not sure who it is.

Stay tuned for more PS3 Hacks and PS3 CFW news, follow us on Twitter and be sure to drop by the PS3 Hacks and PS3 Custom Firmware Forums for the latest PlayStation 3 scene updates and homebrew releases!

Comments 26 Comments - Go to Forum Thread »

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Starchild2k's Avatar
#11 - Starchild2k - 93w ago
The 4.21 is a optional update to improve system stability thats all this is update is for. IT IS OPTIONAL!!! I am sure if there was a problem with CFW users getting on PSN this would be the place to find out.

As soon as I knew of this update I tested 2 of the 3 working methods getting CFW users on PSN and this update doesn't affect CFW users. I am not saying that this is concrete proof but as of now it has no affect to CFW users.

As always if the system asks to update while on FckPSN, PSON, etc. DO NOT UPDATE!!!! Wait until there is another CFW solution is out.

x4ninh4's Avatar
#10 - x4ninh4 - 93w ago
I've seen a lot of changelogs around regarding 4.21. Is this really even worth updating to? I mean, does this optional update actually amount for anything? Does anyone know?

Best regards.

Starchild2k's Avatar
#9 - Starchild2k - 93w ago
okay in order to deactivate the rebug 4.11 spoofer you must use CEX DEX to deactivate the spoofer. Once your in CEX DEX you must switch the system back to RETAIL (L1+X) Restart the system and the system will show 3.55 again in the System Information. Also if you plan on using PSON on rebug 3.55.2 DON'T!!!

It will cause the system to have a RSOD (RED SCREEN OF DEATH) which in this case you would have to relaod the CFW in Recovery Mode to fix the RSOD. If you plan on using fckpsn on REBUG 3.55.2 then you must first use DEV BLIND to get dev_flash access so you can replace the CA27.cer with the fckpsn CA27.cer.

If you do go this route you wont have to switch from REBUG 3.55.2 to kmeaw 3.55. the only reason you would need to switch from rebug 3.55.2 to kmeaw 3.55 is if you planned on using PSoN. I hope this helps you out and good luck and if there is any more questions feel free to ask and I will help you out as much as I can!

cursorsauce's Avatar
#8 - cursorsauce - 93w ago
kind of off-topic but anyone know how i can deactivate 4.11 spoof for rebug... when i try to load the program it just kicks me back to XMB.

theinfinite's Avatar
#7 - theinfinite - 93w ago
Can an update to this firmware make a retail ps3 into a demo? I ask because I recently had my demo turned into a retail ps3. Just wanted to know. Thanks.

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