P0sixspwn (iOS 6 jailbreak tool) will not be released for the latest firmware released by Apple as reported by iH8sn0w on Twitter.
So the newer version of iOS, 6.1.6, released on Friday to deal with a serious vulnerability will not be jailbreaked.
While evad3rs immediately released an upgraded evasi0n that supports jailbreak for iOS 7.0.6, iH8sn0w will not. As it says on Twitter: “Don't wait for an update on untethered jailbreak at 6.1.6 with p0sixspwn. ”
If you are on iOS 6 and want to keep your jailbreak better, stay away from iOS 6.1.6 and for your security to use its patch Ryan Petrich which fixes the SSL vulnerability in iOS. On the other hand, if you want to be safe and don't care about jailbreak, you'd better update it functional you.