A flaw was found in the way an LDAP search expression could crash the shared LDAP server process of a samba AD DC in samba before version 4.10. An authenticated user, having read permissions on the LDAP server, could use this flaw to cause denial of service.
https://www.debian.org/security/2019/dsa-4397
https://usn.ubuntu.com/3895-1/
https://security.netapp.com/advisory/ntap-20190226-0001/
https://lists.debian.org/debian-lts-announce/2019/03/msg00000.html
https://bugzilla.samba.org/show_bug.cgi?id=13773
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-3824
http://www.securityfocus.com/bid/107347
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00035.html