This is a security release in order to address the following defect: o CVE-2016-2119 (Client side SMB2/3 required signing can be downgraded) release note : https://www.samba.org/samba/history/samba-4.3.11.html details : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2119 https://www.samba.org/samba/security/CVE-2016-2119.html