The _rsvg_css_normalize_font_size function in librsvg 2.40.2 allows context-dependent attackers to cause a denial of service (stack consumption and application crash) via circular definitions in an SVG document.
https://git.gnome.org/browse/librsvg/commit/?id=d1c9191949747f6dcfd207831d15dd4ba00e31f2
http://www.openwall.com/lists/oss-security/2016/05/10/15
http://www.openwall.com/lists/oss-security/2016/04/30/3
http://www.openwall.com/lists/oss-security/2016/04/28/7
http://www.openwall.com/lists/oss-security/2016/04/28/4
http://www.debian.org/security/2016/dsa-3584
http://lists.opensuse.org/opensuse-updates/2016-05/msg00079.html