A flaw was discovered in OpenLDAP before 2.4.57 leading to an invalid pointer free and slapd crash in the saslAuthzTo processing, resulting in denial of service.
http://seclists.org/fulldisclosure/2021/May/64
http://seclists.org/fulldisclosure/2021/May/65
http://seclists.org/fulldisclosure/2021/May/70
https://lists.debian.org/debian-lts-announce/2021/02/msg00005.html
https://security.netapp.com/advisory/ntap-20210226-0002/
https://support.apple.com/kb/HT212529
https://support.apple.com/kb/HT212530