The details on the TrueCrypt 7.1a (and by extension the CipherShed and VeraCrypt v1.15 and older) privilege escalation vulnerability CVE-2015-7358 are available now, including a proof-of-concept implementation of the exploit.
Now, as I don't really understand what is going on there I'd like to know who has to worry about this.
Does there need to be TrueCrypt installed onto the machine? Does the executing user needs administrator privileges to obtain system privileges via the exploit? Can one exploit this on a mobile basis with the traveller installation of TrueCrypt?