Tools Introducing WinterBreak - Better Late Than Never

[tucker13234]

Is it possible to use WinterBreak to restore Paperwhite 3 (7th gen) to the original OS? (pre-5.x)

[juliazero]

https://kindlemodding.org/firmware-a...g/downgrading/

[tucker13234]

Originally Posted by juliazero

https://kindlemodding.org/firmware-a...g/downgrading/

Thank you. I followed the steps up to and including 'disable OTA updates' (with last thing being 'Restore' in KULA) and managed to downgrade my PW3 to 5.14.2. However, I cannot downgrade to anything lower below that. I keep getting 'Update Error: 12'. I tried 5.8.x, 5.9.x, 5.12.x, and even 5.14.1 which should be just below 5.14.2.

PS: I re-installed and re-applied the hotfix after downgrading to 5.14.2, had to re-install KULA as it wouldn't open after dowgrade, and Removed/Restored OTA updates again. Nothing helps.

Any help would be much appreciated, thank you!

[juliazero]

I successfully downgraded oasis 3 to 5.13.6 using this method so it's weird.

This KUAL doesn't work for you?
https://kindlemodding.org/jailbreaki...S2_install.bin

Edit: Haha I misread about kual

[tucker13234]

Thank you for the reply, @juliazero. Mystery solved! All's I needed to do was run Downgrader in KUAL once again and I successfully downgraded to 5.8.5 Still, I really appreciate your replies, it definitely helped get on the right track.

To whom it may concern, compared to downgrading to 5.14.2, 5.8.5 was a total reset will all the files lost. At least on PW3, I could also skip the registration by powering down and rebooting if anyone's into that.

[sparkyboy]

Has anyone tested if WinterBreak will persist after a 2024 Kindle Scribe is updated to 15.18.3?

[geminiosiris]

Hi All,

I've jailbroken a few new Kindles recently, but am having an error that no amount of factory resets and reinstall of firmware seems to help.

Kindle: Scribe 2024
Firmware: 5.17.3

Jailbreak succeeds
Hotfix is applied to make it persistent.

However, when using the KUAL hotfix, it says that an invalid update file was found and it removes it from the root directory.

If I try it through mrpackages, it attempts to install, but has the following error:

[2025-07-17 @ 23:17:34 -0600] :: [MRPI r19303] - Beginning the processing of package 'Update_KUALBooklet_c6ac782_install.bin' (KUALBooklet c6ac782 I) . . .


Failed to parse package 'Update_KUALBooklet_c6ac782_install.bin' (KUALBooklet c6ac782 I) [return code: 127], skipping . . .


KindleTool output:
env: can't execute '/mnt/us/extensions/MRInstaller/bin/K5/kindletool': No such file or directory

Does anyone have any ideas on how to get KUAL installed?

Thanks!

[jackm8]

Originally Posted by sparkyboy

Has anyone tested if WinterBreak will persist after a 2024 Kindle Scribe is updated to 15.18.3?

I'm still on 15.18.1. There's nothing in 15.8.3 that would warrant upgrade for me, so I haven't even attempted it.

Update should work on jailbroken device, as long as you make all the steps.

[DNSB]

Originally Posted by geminiosiris

However, when using the KUAL hotfix, it says that an invalid update file was found and it removes it from the root directory.

If I try it through mrpackages, it attempts to install, but has the following error:

[2025-07-17 @ 23:17:34 -0600] :: [MRPI r19303] - Beginning the processing of package 'Update_KUALBooklet_c6ac782_install.bin' (KUALBooklet c6ac782 I) . . .


Failed to parse package 'Update_KUALBooklet_c6ac782_install.bin' (KUALBooklet c6ac782 I) [return code: 127], skipping . . .


KindleTool output:
env: can't execute '/mnt/us/extensions/MRInstaller/bin/K5/kindletool': No such file or directory

Does anyone have any ideas on how to get KUAL installed?

Thanks!

Going by the Kindle Modding download page, the download file should be Update_KUALBooklet_ALLDEVICES_KS2_install.bin. I may be wrong but I was under the impression the version you tried to use is for older Kindles.

[geminiosiris]

You are correct. ALLDEVICES solved the problem.

Thank you for responding and assisting me in getting it solved.

[DNSB]

Good to hear that I was able to help you.

[widardd]

Hey everyone. PW4 on 5.16.5 (got it used)

Followed the tutorial 5 times now very closely, but still no luck.
I get updating store front followed by the famous unexpected error.

Consider basic user errors like hidden folders to be respected, my background is IT.

Any help would be greatly appreciated!

[widardd]

Originally Posted by widardd

Hey everyone. PW4 on 5.16.5 (got it used)

Followed the tutorial 5 times now very closely, but still no luck.
I get updating store front followed by the famous unexpected error.

Consider basic user errors like hidden folders to be respected, my background is IT.

Any help would be greatly appreciated!

Found the solution. My amazon.de-account was the issue, did it with a fresh one from amazon.com and it worked instantly.

[MleisCardo]

Does in work on fw 5.6.1.1 ?

[MleisCardo]

Originally Posted by HackerDude

Nah, just a new software exploit that hasn't been patched yet!
However, whilst this exploit works on all Kindles, the hotfix does not yet work on ColorSoft Kindles, it's something I'm working on

Does in work on fw 5.6.1.1 ?