Unspecified vulnerability in the Core RDBMS component in Oracle Database Server 10.1.0.5, 10.2.0.3, 10.2.0.4, 10.2.0.5, 11.1.0.7, and 11.2.0.1 allows remote attackers to affect availability via unknown vectors.
http://www.us-cert.gov/cas/techalerts/TA11-201A.html
http://www.oracle.com/technetwork/topics/security/cpujuly2011-313328.html