Ubuntu Security Notice 1966-1 – Jeremy Allison discovered that Samba incorrectly handled certain extended attribute lists. A remote attacker could use this issue to cause Samba to hang, resulting in a denial of service…. Ubuntu Security Notice 1966-1 – Jeremy Allison discovered that Samba incorrectly handled certain extended attribute lists. A remote attacker could use this issue to cause Samba to hang, resulting in a denial of service.

Read more http://packetstormsecurity.com/files/123378/USN-1966-1.txt