Samba versions 3.0.1 through 3.0.22 suffer from a memory exhaustion vulnerable in smbd that can result in a denial of service.
You can download this advisory from the following link: https://packetstormsecurity.com/files/download/48177/smbd-DoS.txt
Source: https://packetstormsecurity.com/files/48177/smbd-DoS.txt.html