netfilter do_replace() bug is not remotely exploitable

I don't know how people like securityfocus and heise.de and others claim that the recently-discovered and fixed 'do_replace()' bug is remotely exploitable.

In fact, the bug (which was found and fixed by Solar Designer while working for the OpenVZ project) can only happen in a codepath that can be executed by the local root user. Not even a non-root user, neither any remote parties can hit that bug and/or exploit anything.