samba -- denial of service vulnerability

The Samba project reports:

All current released versions of Samba are vulnerable to
a denial of service on an authenticated or guest connection.
A malformed packet can cause the smbd server to loop the CPU
performing memory allocations and preventing any further service.
A connection to a file share, or a local account is needed
to exploit this problem, either authenticated or unauthenticated
if guest connections are allowed.