The jailbreak community is at risk of malware following a release of a proof of concept that demonstrates it's possible for a tweak to permanently brick your iPhone.
Pod2g has tweeted to accuse iH8sn0w and winocm of burning a valuable root exploit that could have been used for future jailbreaks to release p0sixspwn, a jailbreak for iOS 6.1.3, 6.1.4, and 6.1.5.