The X render (Xrender) extension in X.org X Window System 7.0, 7.1, and 7.2, with Xserver 1.3.0 and earlier, allows remote authenticated users to cause a denial of service (daemon crash) via crafted values to the (1) XRenderCompositeTrapezoids and (2) XRenderAddTraps functions, which trigger a divide-by-zero error.
https://exchange.xforce.ibmcloud.com/vulnerabilities/33976
http://www.vupen.com/english/advisories/2007/1658
http://www.vupen.com/english/advisories/2007/1601
http://www.securitytracker.com/id?1017984
http://www.securityfocus.com/bid/23741
http://sunsolve.sun.com/search/document.do?assetkey=1-66-200067-1
http://sunsolve.sun.com/search/document.do?assetkey=1-26-102901-1