An information leak flaw was found in the way SMB1 protocol was implemented by Samba before 4.4.16, 4.5.x before 4.5.14, and 4.6.x before 4.6.8. A malicious client could use this flaw to dump server memory contents to a file on the samba share or to a shared printer, though the exact area of server memory cannot be controlled by the attacker.

It was discovered that the fix for CVE-2017-12163 was not properly shipped in erratum RHSA-2017:2858 for Red Hat Gluster Storage 3.3 for RHEL 6.