Unspecified vulnerability in the Java Runtime Environment component in Oracle Java SE and Java for Business 6 Update 21 5.0 Update 25 and 1.4.2_27 allows remote attackers to affect confidentiality integrity and availability via unknown vectors. NOTE: the previous information was obtained from the October 2010 CPU. Oracle has not commented on claims from a reliable downstream vendor that this allows remote attackers to execute arbitrary code by causing the defaultReadObject method in the Serialization API to set a volatile field multiple times.