Have you recently encountered apps crashes and other problems on the jailbroken iOS device? Maybe a new tweak has been installed, something important has been deleted or maybe it is a malware. Apparently, a new malware Unflod.dylib has been infecting jailbroken iOS devices for months.
Malware unflod it installs on iDevice without your knowledge and steals your Apple ID and password. The malware is not widespread, it was found only on jailbroken devices that added pirated repositories or installed lesser known Cydia packages.