A use-after-free flaw was found in all samba LDAP server versions before 4.10.17, before 4.11.11, before 4.12.4 used in a AC DC configuration. A Samba LDAP user could use this flaw to crash samba.
https://www.samba.org/samba/security/CVE-2020-10760.html
https://usn.ubuntu.com/4409-1/
https://security.gentoo.org/glsa/202007-15
https://lists.debian.org/debian-lts-announce/2020/11/msg00041.html
https://bugzilla.redhat.com/show_bug.cgi?id=1849509%3B
http://lists.opensuse.org/opensuse-security-announce/2020-09/msg00002.html
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00054.html
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00030.html