It was found in Ceph versions before 13.2.4 that authenticated ceph RGW users can cause a denial of service against OMAPs holding bucket indices.
https://usn.ubuntu.com/4035-1/
https://lists.debian.org/debian-lts-announce/2021/08/msg00013.html
https://lists.debian.org/debian-lts-announce/2019/03/msg00002.html
https://ceph.com/releases/13-2-4-mimic-released/
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16846
https://access.redhat.com/errata/RHSA-2019:2541
https://access.redhat.com/errata/RHSA-2019:2538
http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00100.html