An integer underflow in the image processing binary of the MIB3 infotainment unit allows an attacker with local access to the vehicle to cause denial-of-service of the infotainment system. The vulnerability was originally discovered in Skoda Superb III car with MIB3 infotainment unit OEM part number 3V0035820. The list of affected MIB3 OEM part numbers is provided in the referenced resources.
The product subtracts one value from another, such that the result is less than the minimum allowable integer value, which produces a value that is not equal to the correct result.