https://www.theregister.co.uk/2018/05/28/fiat_chrysler_software_recall/

Fiat Chrysler America is recalling 4.8 million vehicles in the US to fix a software bug that could lock the vehicle's cruise control.

Until it's fixed, owners of some Ram pickups, Jeep SUVs, and other Chrysler and Dodge vehicles are being warned against using cruise control.