An anonymous researcher identified bugs in the software s kernel and WebKit browser engine that are likely part of an exploit chain. Apple released an emergency update this week to patch three more recently discovered in iOS. The company described the kernel flaw as a a race condition that the update addresses with improved locking . If exploited, the vulnerability can allow a malicious application to elevate privileges. The fixes affect iPhone 6s and later, iPad Air 2 and later.
Source: https://threatpost.com/apple-patches-zero-days-ios-emergency-update/163374/