CVE-2017-7870 Heap-buffer-overflow in WMF polygon processing Windows Metafiles can contain polygons which under certain circumstances when processed can result in output polygons which have too many points to be represented by LibreOffice"s internal polygon class. Fixed in LibreOffice 5.2.5/5.3.0 Reference CVE-2016-10327 Heap-buffer-overflow in EMF filter Enhanced Metafiles can contain bitmap data preceded by a header and a field with in that header which states the offset from the start of the header to the bitmap data. An emf can be crafted to provide an illegal offset which if not tested for validity can trigger a heap buffer overflow. Fixed in LibreOffice 5.2.5/5.3.0 Reference