libxml2: use-after-free in xmlXIncludeDoProcess() in xinclude.c Reference: https://gitlab.gnome.org/GNOME/libxml2/-/issues/237 Upstream patch: https://gitlab.gnome.org/GNOME/libxml2/-/commit/1098c30a040e72a4654968547f415be4e4c40fe7 CREATE(Triage):(User=admin) CVE-2021-3518 (https://nvd.nist.gov/vuln/detail/CVE-2021-3518)