Unspecified vulnerability in the filter driver (savonaccessfilter.sys) in Sophos Anti-Virus before 7.6.20 allows local users to gain privileges via crafted arguments to the NtQueryAttributesFile function.
http://www.vupen.com/english/advisories/2010/1412
http://www.sophos.com/support/knowledgebase/article/111126.html
http://www.securitytracker.com/id?1024089
http://www.securityfocus.com/archive/1/511773/100/0/threaded