Use-after-free vulnerability in khtml/rendering/render_replaced.cpp in Konqueror in KDE 4.7.3, when the context menu is shown, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code by accessing an iframe when it is being updated.
http://www.openwall.com/lists/oss-security/2012/10/30/6
http://www.openwall.com/lists/oss-security/2012/10/11/11
http://secunia.com/advisories/51145
http://secunia.com/advisories/51097
http://archives.neohapsis.com/archives/bugtraq/2012-11/0005.html