Unspecified vulnerability in the Network Foundation component in Oracle Database Server 10.1.0.5, 10.2.0.4, 10.2.0.5, 11.1.0.7, 11.2.0.1, and 11.2.0.2, when running on Windows, allows remote attackers to affect availability via unknown vectors.
http://www.oracle.com/technetwork/topics/security/cpuapr2011-301950.html