"With the release of Samba 4.4.0 on March 22nd the 4.1 release branch has been marked DISCONTINUED (see Samba Release Planning). Please be aware that Samba 4.1 and below are therefore out of support, even for security fixes. There will be no official security releases for Samba 4.1 and below published by the Samba Team or SerNet (for EnterpriseSAMBA). We strongly advise users to upgrade to a supported release." http://badlock.org https://www.samba.org/samba/latest_news.html#4.4.2