Unspecified vulnerability in the Java Runtime Environment (JRE) in Oracle Java SE and Java for Business 6 Update 23 and earlier, 5.0 Update 27 and earlier, and 1.4.2_29 and earlier allows remote untrusted Java Web Start applications and untrusted Java applets to affect confidentiality, integrity, and availability via unknown vectors related to HotSpot.  NOTE: the previous information was obtained from the February 2011 CPU.  Oracle has not commented on claims from a downstream vendor that this issue is heap corruption related to the Verifier and "backward jsrs."