Information Processing Device and Abnormality Handling Method

An information processing device included in an in-vehicle system of a vehicle includes an information acquisition unit that collects abnormality information relevant to an abnormality that has occurred in the vehicle, a determination unit that identifies a source of generation of the abnormality that has occurred on the basis of the abnormality information, and a spread prevention processing unit that executes a spread prevention process in which a predetermined function of a target identified by the determination unit is restricted.