The SMB1 implementation in smbd in Samba 3.x and 4.x before 4.1.23, 4.2.x before 4.2.9, 4.3.x before 4.3.6, and 4.4.x before 4.4.0rc4 allows remote authenticated users to modify arbitrary ACLs by using a UNIX SMB1 call to create a symlink, and then using a non-UNIX SMB1 call to write to the ACL content.
lists.fedoraproject.org/pipermail/package-announce/2016-March/178730.html
lists.fedoraproject.org/pipermail/package-announce/2016-March/178764.html
lists.fedoraproject.org/pipermail/package-announce/2016-March/180000.html
lists.opensuse.org/opensuse-security-announce/2016-03/msg00063.html
lists.opensuse.org/opensuse-security-announce/2016-03/msg00064.html
lists.opensuse.org/opensuse-security-announce/2016-03/msg00065.html
lists.opensuse.org/opensuse-security-announce/2016-03/msg00081.html
lists.opensuse.org/opensuse-security-announce/2016-03/msg00090.html
lists.opensuse.org/opensuse-security-announce/2016-03/msg00092.html
lists.opensuse.org/opensuse-security-announce/2016-04/msg00042.html
lists.opensuse.org/opensuse-security-announce/2016-04/msg00047.html
lists.opensuse.org/opensuse-security-announce/2016-04/msg00048.html
www.debian.org/security/2016/dsa-3514
www.securityfocus.com/bid/84267
www.securitytracker.com/id/1035220
www.ubuntu.com/usn/USN-2922-1
bugzilla.samba.org/show_bug.cgi?id=11648
h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05121842
www.samba.org/samba/security/CVE-2015-7560.html