The Unbreakable Enterprise Kernel Release 5 (UEK R5) is a heavily tested and optimized operating system kernel for Oracle Linux 7 Update 5 and later on 64-bit Intel (x86_64) and ARM (aarch64) architectures. It is based on the mainline Linux kernel version 4.14 LTS. This release also updates drivers and includes bug and security fixes.
Oracle Linux with UEK R5 delivers kernel modifications to enable support for 64-bit ARM (aarch64) architecture. These changes are built and tested against existing ARM hardware and provide the initial groundwork to support Oracle Linux for ARM. Any ARM features available in UEK R5 are released as a technical preview and some limitations of functionality apply.
The Oracle Linux 7 for ARM release includes a toolchain that includes version 7.3 of the gcc compiler and provides a solid developer toolset to build code for 64-bit ARM platforms. The UEK R5 for the ARM platform is built using this toolchain.
For more details on these and other new features and changes, including a full list of CVEs fixed in this release, please consult the UEK R5 Release Notes.
Before updating an Oracle Linux system to UEK R5, please confirm your applications, including Oracle applications, are supported with UEK R5. Certification of Oracle products on Oracle Linux with the UEK R5 is determined by each Oracle product group. You may find additional information on https://support.oracle.com/epmos/faces/CertifyHome.
Oracle Automatic Storage Management Cluster File System (Oracle ACFS) certification for different kernel versions is described in Document ID 1369107.1 on My Oracle Support.
Oracle Linux maintains user-space compatibility with Red Hat Enterprise Linux, which is independent of the kernel version running underneath the operating system. Existing applications in user space will continue to run unmodified on the UEK R5 and no re-certifications are needed for RHEL certified applications.
To minimize impact on interoperability during releases, the Oracle Linux team works closely with third-party vendors whose hardware and software have dependencies on kernel modules. The kernel ABI for UEK R5 remains unchanged in all subsequent updates to the initial release. In this release, there are changes to the kernel ABI relative to previous releases that require recompilation of third-party kernel modules on the system. Before installing UEK R5, verify its support status with your application vendor.
Oracle Linux can be downloaded, used and distributed free of charge and updates and errata are freely available. This allows you to decide which of your systems require a support subscription and makes Oracle Linux an ideal choice for your development, testing and production systems. You decide which support coverage is the best for each of your systems, individually, while keeping all of your systems up-to-date and secure. For customers with Oracle Linux Premier Support, you also receive access to zero-downtime kernel updates using Oracle Ksplice and support for Oracle OpenStack.
Oracle Linux images available on Oracle Cloud Infrastructure are frequently updated to help ensure access to the latest software. Oracle provided images in Oracle Cloud Infrastructure will soon include Oracle Linux 7 Update 5 with UEK Release 5.
Oracle Linux Premier Support is included with your Oracle Cloud Infrastructure subscription at no additional cost. You can take advantage of all the benefits Oracle Linux Support provides, including access to the latest packages and updates, 24x7 expert support, the My Oracle Support portal with an extensive Linux knowledge base, Oracle Ksplice zero-downtime updates, and the use of Oracle Enterprise Manager to manage and monitor Oracle Linux instances. Using Oracle Linux on Oracle Cloud Infrastructure enables you to have a single point of contact for support across cloud infrastructure, OS, and Oracle software.