Samba before versions 4.6.1, 4.5.7 and 4.4.11 are vulnerable to a malicious client using a symlink race to allow access to areas of the server file system not exported under the share definition.
www.securityfocus.com/bid/97033
www.securitytracker.com/id/1038117
access.redhat.com/errata/RHSA-2017:1265
access.redhat.com/errata/RHSA-2017:2338
access.redhat.com/errata/RHSA-2017:2778
access.redhat.com/errata/RHSA-2017:2789
bugzilla.redhat.com/show_bug.cgi?id=1429472
h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbns03755en_us
www.debian.org/security/2017/dsa-3816
www.exploit-db.com/exploits/41740/
www.samba.org/samba/security/CVE-2017-2619.html