Yeah, we have a 2015 Jeep Cherokee. Chrysler sent us a little cardboard USB memory stick with instructions to reprogram the ECU, as soon as soon as possible.
We had to park the SUV under clear sky, shut off engine, insert the USB, press brake, turn on the wipers, put headlights on bright, hold the horn, press the start button in S-O-S pattern, start engine, set e-brake, get out, do a little dance, re-enter and fasten seatbelt, wait for 40 to 90 minutes with engine running for download to complete and install. Be ready to apply brake if the vehicle lurched forward or backward.
If a cloud came between us and the "Uconnect" (Chrysler's version of On Star) satellite during this time and engine stopped, Chrysler said the Cherokee could be limped to nearest dealer in the "default" mode.
Supposedly our Cherokee is now hack proof for the time being. Suddenly a street thug with a coat hanger or slim jim does not seem like as big a threat anymore.
P.S. most of this is "tongue-in-cheek" humor. The download was fail-safe, and I did not have to get out of the Cherokee and do a little dance.