The Graphics Rendering Engine in Microsoft Windows 2000 through 2000 SP4 and Windows XP through SP2 maps GDI Kernel structures on a global shared memory section that is mapped with read-only permissions, but can be remapped by other processes as read-write, which allows local users to cause a denial of service (memory corruption and crash) and gain privileges by modifying the kernel structures.
kernelwars.blogspot.com/2007/01/alive.html
projects.info-pull.com/mokb/MOKB-06-11-2006.html
secunia.com/advisories/22668
securitytracker.com/id?1017168
www.blackhat.com/html/bh-europe-07/bh-eu-07-speakers.html#Eriksson
www.securityfocus.com/archive/1/466186/100/200/threaded
www.securityfocus.com/bid/20940
www.vupen.com/english/advisories/2006/4358
www.vupen.com/english/advisories/2007/1215
docs.microsoft.com/en-us/security-updates/securitybulletins/2007/ms07-017
exchange.xforce.ibmcloud.com/vulnerabilities/30042
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A2056