IBM strongly recommends that users of the z/VSE Operating System validate the currency of security and System Integrity service and take action to promptly install all security and integrity PTFs.  As a best practice, IBM strongly recommends that clients obtain the latest service information, including  any security and System Integrity APARs for z/VSE from the Service and Support site.

In addition to available PTFs, IBM includes any pertinent Security and/or Integrity APAR fixes in the next Preventative Service Planning (PSP) bucket or Recommended Service Level (RSL) after the fix is available.  The PSP bucket for z/VSE contains all HIPER PTFs along with other recommended service for a specific set of products or components on a given z/VSE refresh level.  The RSL offering provides a list of all APAR/PTF numbers available at specific cutoff dates and fills the gap between regular z/VSE Refresh levels and the more urgent service provided by the PSP bucket.

It is strongly recommended that clients validate the currency of their z/VSE security and System Integrity service levels and routinely check the z/VSE Service and Support site to receive the latest information on IBM z Systems security and System Integrity service. The timely installation of service, including security and System Integrity service, can help minimize potential risks and maintain overall system security and availability.

Contact an IBM Sales Specialist

Browse z Systems


Infrastructure matters. Businesses turn to the IBM mainframe for unmatched security, operational efficiency, speed, seamless scale, and lower cost per transaction. The IBM z System, the world’s premier data and transaction engine, is enabled for mobile, integrates transactions and analytics, and delivers efficient and trusted clouds.

Operating Systems

IBM z Systems supports multiple operation systems:


IBM z Systems combine leading-edge innovation and unparalleled capabilities to power cloud, business analytics, mobile applications, and the most important workloads.

Related links