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Oracle Linux and Unbreakable Enterprise Kernel (UEK) Releases

Simon Coter
Director of Product Management

I've decided to create this blog entry just to share Oracle Linux and UEK releases, how those are associated and which UEK releases are available on different OL versions. So, maybe, this article could be useless for many people who already know which UEK releases are available on each OL release but, at the same time, could be helpful for many others approaching Oracle Linux:

OL Release Initial UEK kernel Initial RHCK kernel UEK2 supported UEK3 supported UEK4 supported UEK5 supported
             
OL6U0 kernel-uek-2.6.32-100.28.5 kernel-2.6.32-71 No. OL6U2 required No. OL6U5 required No. OL6U8 required Not Available
OL6U1 kernel-uek-2.6.32-100.34.1 kernel-2.6.32-131.0.15 No. OL6U2 required No. OL6U5 required No. OL6U8 required Not Available
OL6U2 kernel-uek-2.6.32-300.3.1 kernel-2.6.32-220 Yes No. OL6U5 required No. OL6U8 required Not Available
OL6U3 kernel-uek-2.6.39-200.24.1 kernel-2.6.32-279 Yes, default No. OL6U5 required No. OL6U8 required Not Available
OL6U4 kernel-uek-2.6.39-400.17.1 kernel-2.6.32-358 Yes, default No. OL6U5 required No. OL6U8 required Not Available
OL6U5 kernel-uek-3.8.13-16.2.1 kernel-2.6.32-431 Yes Yes, default No. OL6U8 required Not Available
OL6U6 kernel-uek-3.8.13-44.1.1 kernel-2.6.32-504 Yes Yes, default No. OL6U8 required Not Available
OL6U7 kernel-uek-3.8.13-68.3.4 kernel-2.6.32-573 Yes Yes, default No. OL6U8 required Not Available
OL6U8 kernel-uek-4.1.12-37.4.1 kernel-2.6.32-642 Yes Yes Yes, default Not Available
OL6U9 kernel-uek-4.1.12-61.1.28 kernel-2.6.32-696 Yes Yes Yes, default Not Available
OL6U10 kernel-uek-4.1.12-124.16.4 kernel-2.6.32-754 Yes Yes Yes, default Not Available
             
OL7U0 kernel-uek-3.8.13-35.3.1 kernel-3.10.0-123 Not Available Yes, default No. OL7U3 required No. OL7U5 required
OL7U1 kernel-uek-3.8.13-55.1.6 kernel-3.10.0-229 Not Available Yes, default No. OL7U3 required No. OL7U5 required
OL7U2 kernel-uek-3.8.13-98.7.1 kernel-3.10.0-327 Not Available Yes, default No. OL7U3 required No. OL7U5 required
OL7U3 kernel-uek-4.1.12-61.1.18 kernel-3.10.0-514 Not Available Yes Yes, default No. OL7U5 required
OL7U4 kernel-uek-4.1.12-94.3.9 kernel-3.10.0-693 Not Available Yes Yes, default No. OL7U5 required
OL7U5 kernel-uek-4.1.12-112.16.4 kernel-3.10.0-862 Not Available Yes Yes, default Yes
OL7U6 kernel-uek-4.14.35-1818.3.3 kernel-3.10.0-957 Not Available Yes Yes Yes, default

NB: RHCK acronym states for Red Hat Compatible Kernel.

As you maybe already know, Oracle Linux also supports ARM64 architecture:

OL Release Initial UEK kernel Initial RHCK kernel UEK2 supported UEK3 supported UEK4 supported UEK5 supported
OL7U5 - ARM64 kernel-uek-4.14.35-1818.0.9 Not Available No No No Yes, default
OL7U6 - ARM64 kernel-uek-4.14.35-1818.3.3 Not Available No No No Yes, default

 

You can find further details on Oracle Linux 7.5 for ARM64 architecture on our Linux Blog.

Related to the Kernel I also want to specify something important related to the UEK acronym and releases associated:

Kernel Release UEK Acronym Latest Release OL6 Latest Release OL7
2.6.32 UEK Oracle Linux 6 Not Available
2.6.39 UEK2 Oracle Linux 6 Not Available
3.8.13 UEK3 Oracle Linux 6 Oracle Linux 7
4.1.12 UEK4 Oracle Linux 6 Oracle Linux 7
4.14.35 UEK5 Not Available Oracle Linux 7

Further information:

I'll do my best to keep those information updated and, in the meanwhile, feel free to leave your comments here!

Join the discussion

Comments ( 2 )
  • Mike Burke Monday, September 10, 2018
    Have these been tested on any server platforms, containers etc
  • Simon Monday, September 10, 2018
    Hi Mike,

    UEK is part of Oracle Linux distribution and used/tested/certified on Oracle Cloud, Oracle Engineered Systems and also third party hardware (see https://linux.oracle.com/pls/apex/f?p=117 for further details ).
    That said, Oracle Linux + UEK is the development platform for all Oracle Products.
    Let me know if you need further details.

    Simon
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