It was discovered that the ClassLoaderWithRepository class in the JMX component of OpenJDK did not sufficiently perform classloader consistency checks, allowing classloader to return class with different name than requested. An untrusted Java application or applet could use this flaw to bypass certain Java sandbox restrictions.
Public now via Oracle CPU October 2016, fixed in Oracle JDK 8u111, 7u121, and 6u131. External References: http://www.oracle.com/technetwork/security-advisory/cpuoct2016-2881722.html#AppendixJAVA
OpenJDK 8 upstream commit: http://hg.openjdk.java.net/jdk8u/jdk8u/jdk/rev/588df0398c57
This issue has been addressed in the following products: Red Hat Enterprise Linux 6 Red Hat Enterprise Linux 7 Via RHSA-2016:2079 https://rhn.redhat.com/errata/RHSA-2016-2079.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-2016:2088 https://rhn.redhat.com/errata/RHSA-2016-2088.html
This issue has been addressed in the following products: Oracle Java for Red Hat Enterprise Linux 5 Oracle Java for Red Hat Enterprise Linux 6 Oracle Java for Red Hat Enterprise Linux 7 Via RHSA-2016:2090 https://rhn.redhat.com/errata/RHSA-2016-2090.html
This issue has been addressed in the following products: Oracle Java for Red Hat Enterprise Linux 5 Oracle Java for Red Hat Enterprise Linux 6 Oracle Java for Red Hat Enterprise Linux 7 Via RHSA-2016:2089 https://rhn.redhat.com/errata/RHSA-2016-2089.html
This issue has been addressed in the following products: Red Hat Enterprise Linux 5 Supplementary Via RHSA-2016:2138 https://rhn.redhat.com/errata/RHSA-2016-2138.html
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Supplementary Red Hat Enterprise Linux 6 Supplementary Via RHSA-2016:2137 https://rhn.redhat.com/errata/RHSA-2016-2137.html
This issue has been addressed in the following products: Red Hat Enterprise Linux 6 Supplementary Red Hat Enterprise Linux 7 Supplementary Via RHSA-2016:2136 https://rhn.redhat.com/errata/RHSA-2016-2136.html
This issue has been addressed in the following products: Red Hat Enterprise Linux 5 Supplementary Red Hat Enterprise Linux 6 Supplementary Via RHSA-2016:2659 https://rhn.redhat.com/errata/RHSA-2016-2659.html
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Red Hat Enterprise Linux 5 Red Hat Enterprise Linux 6 Via RHSA-2016:2658 https://rhn.redhat.com/errata/RHSA-2016-2658.html
This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Red Hat Enterprise Linux 5 Red Hat Enterprise Linux 6 Via RHSA-2017:0061 https://rhn.redhat.com/errata/RHSA-2017-0061.html
This issue has been addressed in the following products: Red Hat Satellite 5.6 Red Hat Satellite 5.7 Via RHSA-2017:1216 https://access.redhat.com/errata/RHSA-2017:1216