Use-after-free vulnerability in Mono, when Moonlight 2.x before 2.4.1 or 3.x before 3.99.3 is used, allows remote attackers to cause a denial of service (plugin crash) or obtain sensitive information via vectors related to member data in a resurrected MonoThread instance.
https://github.com/mono/mono/commit/722f9890f09aadfc37ae479e7d946d5fc5ef7b91
https://exchange.xforce.ibmcloud.com/vulnerabilities/66627
https://bugzilla.redhat.com/show_bug.cgi?id=694933
https://bugzilla.novell.com/show_bug.cgi?id=678515
https://bugzilla.novell.com/show_bug.cgi?id=667077
http://www.vupen.com/english/advisories/2011/0904
http://www.securityfocus.com/bid/47208
http://www.mono-project.com/Vulnerabilities
http://secunia.com/advisories/44076
http://secunia.com/advisories/44002
http://openwall.com/lists/oss-security/2011/04/06/14
http://lists.opensuse.org/opensuse-updates/2011-04/msg00024.html