Oracle Linux 6.5 was released.
"Oracle is pleased to announce the general availability of Oracle Linux 6.5 for x86 (32 bit) and x86_64 (64 bit) architectures. Oracle Linux 6 Update 5 ships with three sets of kernel packages: Unbreakable Enterprise Kernel Release 2 (2.6.39 for x86); Unbreakable Enterprise Kernel Release 3 (3.8.13 for x86_64); Red Hat Compatible Kernel (2.6.32 for x86 and x86_64). UEK R3 includes the following major improvements over UEK R2: integrated DTrace support in the UEK R3 kernel and user-space tracing of DTrace-enabled applications; Device mapper support for an external, read-only device...."
Oracle Linux is an enterprise-class Linux distribution supported by Oracle. According to the project's web site, "Oracle starts with Red Hat Linux, removes Red Hat trademarks, and then adds Linux bug fixes." Oracle Linux is, and intends to remain, fully compatible with Red Hat Enterprise Linux.