A flaw was found in the AWT component of OpenJDK handled windowing widgets on the MacOSX platform. An untrusted Java application or applet could use this flaw to bypass Java sandbox restrictions.
MacOSX only, not applicable to Linux builds.
OpenJDK8 upstream commit: http://hg.openjdk.java.net/jdk8u/jdk8u/jdk/rev/c878d0baff4a