It was discovered that GCM (Galois Counter Mode), a mode of operation for symmetric key cryptographic block ciphers, implementation in the Security component of OpenJDK failed to properly perform null check. This could cause crash when application performed encryption using a block cipher in GCM mode. GCM mode is used in several cipher suites defined for TLS 1.2. Affected code was added to OpenJDK version 8, earlier versions 6 and 7 do not contain it and are therefore unaffected.
This issue is already fixed in upstream OpenJDK 8 repositories: http://hg.openjdk.java.net/jdk8u/jdk8u/jdk/rev/e7e36535d70e
Public now via Oracle Critical Patch Update - July 2015. Fixed in Oracle Java SE 8u51. External References: http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html#AppendixJAVA
This issue has been addressed in the following products: Red Hat Enterprise Linux 6 Red Hat Enterprise Linux 7 Via RHSA-2015:1228 https://rhn.redhat.com/errata/RHSA-2015-1228.html
This issue has been addressed in the following products: Oracle Java for Red Hat Enterprise Linux 6 Oracle Java for Red Hat Enterprise Linux 7 Via RHSA-2015:1241 https://rhn.redhat.com/errata/RHSA-2015-1241.html