xmlStringLenDecodeEntities in parser.c in libxml2 2.9.10 has an infinite loop in a certain end-of-file situation.
https://www.oracle.com/security-alerts/cpuoct2021.html
https://www.oracle.com/security-alerts/cpujul2022.html
https://www.oracle.com/security-alerts/cpujul2020.html
https://www.oracle.com/security-alerts/cpuapr2022.html
https://usn.ubuntu.com/4274-1/
https://us-cert.cisa.gov/ics/advisories/icsa-21-103-08
https://security.netapp.com/advisory/ntap-20200702-0005/
https://security.gentoo.org/glsa/202010-04
https://lists.debian.org/debian-lts-announce/2020/09/msg00009.html
https://gitlab.gnome.org/GNOME/libxml2/commit/0e1a49c89076
https://cert-portal.siemens.com/productcert/pdf/ssa-292794.pdf
http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00047.html