Jailbreaks are specific to an OS. Once you update your OS, you lose the jailbreak until one is developed for that OS. In this case, a patch could be something that patches the hole in the software that enables the jailbreakers to do their thing.
Yeah...what he said. I don't think a jailbreak is out so a patch is unlikely. However if somehow the learned of the vulnerability prior to a jailbreak release the could have possibly patched the exploit. Again,unlikely but if it's a minor update I'd wait anyway.