This vulnerability allows local attackers to escalate privileges on vulnerable installations of Microsoft Windows. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the CD-ROM driver. Crafted data sent to IOCTL 0x0056c064 can trigger access to a pointer prior to initialization. An attacker can leverage this vulnerability to escalate privileges to the level of SYSTEM.