A method to jailbreak iOS 6 devices has just been released by a team of hackers known as evad3rs. The tool, evasi0n, uses a previously unknown exploit to jailbreak all versions of iOS 6 on iPhones, iPods, and iPads. The jailbreak software works on Windows, OS X, and Linux and offers the ability to do an untethered jailbreak. This means that "the iOS device doesn't need to be plugged into a computer to re-enable the jailbreak every time the device is rebooted."
Source: Ars Technica