Unspecified vulnerability in the Listener component in Oracle Database Server 9.2.0.8, 9.2.0.8DV, 10.1.0.5, 10.2.0.4, 11.1.0.7, and 11.2.0.1 allows remote attackers to affect availability via unknown vectors.
http://www.oracle.com/technetwork/topics/security/cpuoct2010-175626.html