zOS: Releases, patches & end-of-life
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Lifecycle guide for zOS from IBM

All releases, patches, maintenance and support periods at a glance

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📅 Last update on 2025-12-12

What is zOS?

Automate product release and end-of-life managementz/OS is a 64-bit operating system for IBM z/Architecture mainframes, introduced by IBM in October 2000. It derives from and is the successor to OS/390, which in turn was preceded by a string of MVS versions. Like OS/390, z/OS combines a number of formerly separate, related products, some of which are still optional. z/OS has the attributes of modern operating systems, but also retains much of the older functionality originated in the 1960s and still in regular use—z/OS is designed for backward compatibility.
 

The entire lifecycle of zOS

The following figure shows you the visualised product life cycle of zOS. You can see all releases with the latest patch version, the long-term support characteristics (orange flag in the green circle, the periods for version provision, maintenance and support.
zOS (IBM) release, version and end-of-life information
XzOS (IBM) release, version and end-of-life information
Figure: Release, patch and end-of-life cycle of product zOS (IBM)
 

Facts and figures about zOS

Product
zOS
Vendor
IBM
Latest version
3.2.0
Number of releases
20
Number of versions
20
Number of unstable versions
0
Number of versions affected by CVE
0
Licence
Commercial
 
 

Questions or interested? Talk to me!


Lukas Böttcher
Lukas Böttcher
Business Development Manager
P:  +49-30-221986-51
LinkedIn

 

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