Use-after-free vulnerability in the Client/Server Run-time Subsystem (CSRSS) in Microsoft Windows Vista does not properly handle connection resources when starting and stopping processes, which allows local users to gain privileges by opening and closing multiple ApiPort connections, which leaves a "dangling pointer" to a process data structure.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A1524
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2007/ms07-021
http://www.vupen.com/english/advisories/2007/1325
http://www.us-cert.gov/cas/techalerts/TA07-100A.html
http://www.securitytracker.com/id?1017897
http://www.securityfocus.com/bid/23338
http://www.securityfocus.com/archive/1/466331/100/200/threaded
http://www.securityfocus.com/archive/1/465233/100/0/threaded
http://www.kb.cert.org/vuls/id/219848
http://securityreason.com/securityalert/2531
http://secunia.com/advisories/24823
http://research.eeye.com/html/advisories/published/AD20070410b.html