Provide references for CVE-2021-3621.
Where can I find more information about CVE-2021-3621?
References are available at: https://sssd.io/release-notes/sssd-2.6.0.html, https://bugzilla.redhat.com/show_bug.cgi?id=1975142, https://lists.debian.org/debian-lts-announce/2023/05/msg00028.html.