Technical Information

Brief overview of the risk:
This security update resolves a vulnerability in Microsoft Windows. The vulnerability could allow elevation of privilege if an attacker logs on to a target system and runs a specially crafted application that, by way of a race condition, results in references to memory locations that have already been freed.
Detailed Information on the risk:
An elevation of privilege vulnerability exists in the Windows Pragmatic General Multicast (PGM) protocol that is caused when an attacker-induced race condition results in references to memory contents that have already been freed. An attacker who successfully exploited this vulnerability could execute code with elevated privileges. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.Further information on this exploit is available at : MS15-133