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 or possibly have unspecified other impact via vectors related to finalizing and then resurrecting a DynamicMethod instance.
Gentoo Linux Security Advisory 201206-13 - Multiple vulnerabilities were found in Mono, the worst of which allowing for the remote execution of arbitrary code. Versions less than 2.8.1-r1 are affected.