The telephony component in Android 4.x before 4.4.4, 5.0.x before 5.0.2, 5.1.x before 5.1.1, and 6.x before 2016-08-01 allows remote attackers to cause a denial of service (device crash) via a NITZ time value of 2038-01-19 or later that is mishandled by the system clock, aka internal bug 29083635, related to a "Year 2038 problem."