Apple has recently updated the 2nd-generation Apple TV (2G) firmware from Version 4.4.3 (9A4051) to Version 4.4.4 . The new version has mainly released for performance improvements and minor bug fixes found in previous version.
general performance and stability improvements, including a fix for an issue that displayed an error when playing some video content.
You can upgrade the latest version 4.4.4(9A406a) Over The Air (OTA) by going to Settings > General or manually download the firmware file from here.
Jailbreaking community took no time to release the new version of Seas0nPass, a tool which allow users to both jailbreak and boot Apple TV by creainge custom firmware files. At the moment the jailbreak is tethered so Apple TV requires a tethered boot every time it is rebooted or switched off.