The latest Android security update fixes the Dirty COW privilege escalation attack that can allow malicious apps to take full control of devices. Researchers from Trend Micro devised a new attack variant that bypasses SELinux restrictions by injecting malicious code directly into other processes. Google has rated this vulnerability as high severity, because it can result in a denial-of-service attack that delays the phone’s GPS receiver from establishing a GPS lock. The December update also fixes an interesting security vulnerability in the mechanism that downloads GPS satellite information, known as the GPS almanac.”]