Apple has released a page on their Web site
documenting the security improvements in the newly-released iOS 8.1.1 software release for its mobile devices, which patches the Pangu8 jailbreak for iOS 8.
On the page, Apple credits @PanguTeam
for finding and exploiting these vulnerabilities, which are now patched in iOS 8.1.1:
Originally Posted by Apple:
Available for: iPhone 4s and later, iPod touch (5th generation) and later, iPad 2 and later
Impact: A local user may be able to execute unsigned code
Description: A state management issue existed in the handling of Mach-O