DRM bricks Polish trains

Some Polish trains were sent for routine maintenance, after which they would
not run even though nothing was evidently wrong. As a last resort, the
railway hired the Dragon Sector hacking group which analysed the trains'
software and found code that made the trains fail if their GPS said they'd
been in a list of locations that happened to match repair shops not run by
the trains' manufacturer.

NEWAG, the manufacturer, denies everything and has sued them for slander.

https://badcyber.com/dieselgate-but-for-trains-some-heavyweight-hardware-hacking/ …

code dragon drm fail found gps hacking hacking group list maintenance nothing polish railway run sector software trains wrong