The Bdat driver of Prague smart phones with software versions earlier than Prague-AL00AC00B211, versions earlier than Prague-AL00BC00B211, versions earlier than Prague-AL00CC00B211, versions earlier than Prague-TL00AC01B211, versions earlier than Prague-TL10AC01B211 has integer overflow vulnerability due to the lack of parameter validation. An attacker tricks a user into installing a malicious APP and execute it as a specific privilege; the APP can then send a specific parameter to the driver of the smart phone, causing arbitrary code execution.