Users of the Kindle 5 and up can jailbreak their devices, giving them full access to the underlying Linux OS thanks to the all-new WinterBreak exploit. Apps, PDFs, and much more await those brave enough to follow HackerDude's tutorial.https://www.notebookcheck.net/Free-the-Kindle-New-jailbreak-works-on-2024-Kindles.940217.0.html
Will this work on a first gen kindle scribe?
According to
Kindle Modding Wiki -> Jailbreaking Your Kindle -> Kindle Models
KindleScribe16GB_227 Kindle Scribe (1st Generation) KS LATEST
Yes it does support it.