Unspecified vulnerability in an ioctl in hcmon.sys in VMware Workstation 6.5.1 and earlier, VMware Player 2.5.1 and earlier, VMware ACE 2.5.1 and earlier, and VMware Server 1.0.x before 1.0.9 build 156507 and 2.0.x before 2.0.1 build 156745 allows local users to cause a denial of service via unknown vectors, a different vulnerability than CVE-2008-3761.