Unbound before 1.10.1 has an infinite loop via malformed DNS answers received from upstream servers.
lists.opensuse.org/opensuse-security-announce/2020-06/msg00067.html
lists.opensuse.org/opensuse-security-announce/2020-06/msg00069.html
www.openwall.com/lists/oss-security/2020/05/19/5
lists.debian.org/debian-lts-announce/2021/02/msg00017.html
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F5NFROI2OMCZLYRTCNGHGO3TUD32LCIQ/
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YJ42N2HBZ3DXMSEC56SWIIOFQGOS5M7I/
nlnetlabs.nl/downloads/unbound/CVE-2020-12662_2020-12663.txt
security.FreeBSD.org/advisories/FreeBSD-SA-20:19.unbound.asc
usn.ubuntu.com/4374-1/
www.debian.org/security/2020/dsa-4694