In libxml2 before 2.15.4, xmlFAParsePosCharGroup has an out-of-bounds read, aka an out-of-bounds read in the NXT macro in xmlregexp.Referenceshttps://github.com/GNOME/libxml2/compare/v2.15.3...v2.15.4https://github.com/GNOME/libxml2/commit/76fe08d97de88bfaef2f7d5cd27f11954cc5bee2https://gitlab.gnome.org/GNOME/libxml2/-/work_items/1099
