Complex sentence: Stagefright is the group of software bugs that affect versions 2.2 ("Froyo") and newer of the Android operating system, allowing an attacker to perform arbitrary operations on the victim's device through remote code execution and privilege escalation.
Split into simpler sentences: Stagefright is the name given to a group of software bugs that affect versions 2.2 ("Froyo") and newer of the Android operating system. Exploitation of the bug allows an attacker to perform arbitrary operations on the victim's device through remote code execution and privilege escalation.