These issues are fixed in 2.12.10, 2.13.6 and the upcoming 2.14.0 release. Older branches won't receive official updates.
[CVE-2024-56171] Use-after-free in xmlSchemaIDCFillNodeTables https://gitlab.gnome.org/GNOME/libxml2/-/issues/828 [CVE-2025-24928] Stack-buffer-overflow in xmlSnprintfElements https://gitlab.gnome.org/GNOME/libxml2/-/issues/847 Null-deref in xmlPatMatch https://gitlab.gnome.org/GNOME/libxml2/-/issues/861 Nick