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Unbreakable Enterprise Kernel

The Unbreakable Enterprise Kernel (UEK) is a Linux kernel built by Oracle and supported through Oracle Linux support. Its focus is performance, stability, and minimal backports by tracking the mainline source code as closely as is practical. UEK is well-tested and used to run Oracle's Engineered Systems, Oracle Cloud Infrastructure, and large enterprise deployments for Oracle customers.

Notices, Certifications & Tutorials

Notices

The notices provided below, pertain to changes and updates to operating system behavior that may fall outside of standard release cycles, or which may apply generally across releases and update levels.

Certifications

Oracle provides certifications for hardware that is compatible with Oracle Linux and UEK. Additionally, software available from Independent Software Vendors (ISVs) may also be certified to work with Oracle Linux and UEK. The links provided below can help you to verify whether your hardware or software choice is certified.

Tutorials

The following tutorials can be used to assist with kernel boot operations.

Unbreakable Enterprise Kernel Release 7

UEK R7 is based on the upstream 5.15.0 kernel release with additional patches and enhancements.

Unbreakable Enterprise Kernel Release 6

UEK R6 is based on the upstream 5.4.17 kernel release with additional patches and enhancements.

Unbreakable Enterprise Kernel Release 5

UEK R5 is based on the upstream 4.14.35 kernel release with additional patches and enhancements.

Unbreakable Enterprise Kernel Release 4

UEK R4 is based on the upstream 4.1.12 kernel release with additional patches and enhancements.

Unbreakable Enterprise Kernel Release 3

UEK R3 is based on the upstream 3.8.13 kernel release with additional patches and enhancements.

Archived Documentation

The following documentation describes software that is in Extended Support or Sustaining Support. See Oracle Open Source Support Policies for more information. Oracle recommends that you upgrade the software described by this documentation as soon as possible. Note that if you are using Oracle Ksplice, patch updates are no longer provided for the kernels described here.