www.securityfocus.com/bid/106321
access.redhat.com/errata/RHSA-2019:2022
access.redhat.com/errata/RHSA-2019:2713
gitlab.freedesktop.org/poppler/poppler/issues/692
gitlab.freedesktop.org/poppler/poppler/merge_requests/143
lists.debian.org/debian-lts-announce/2019/03/msg00008.html
lists.debian.org/debian-lts-announce/2020/07/msg00018.html
usn.ubuntu.com/3865-1/