A good start is https://social.hackerspace.pl/@q3k/111528162462505087 https://social.hackerspace.pl/@q3k/111528162462505087 and https://badcyber.com/dieselgate-

A good start is https://social.hackerspace.pl/@q3k/111528162462505087 https://social.hackerspace.pl/@q3k/111528162462505087 and https://badcyber.com/dieselgate-but-for-trains-some-heavyweight-hardware-hacking/ https://badcyber.com/dieselgate-but-for-trains-some-heavywei... There were also multiple threads on earlier parts of the story, but those are the "origin" english language versions.