Skip to content
Search to learn about InterSystems products and solutions, career opportunities, and more.

Alert: Access Violations with Shadowing

November 25, 2019 – Alert: Access Violations with Shadowing

InterSystems has corrected a defect that can cause shadowing to fail with an access violation. In rare cases, the defect can cause memory corruption, leading to unpredictable behavior.

Note: The defect does not affect mirroring.

This defect affects:

  • InterSystems IRIS 2019.1.1 and 2019.3
  • IRIS for Health 2019.1.1 and 2019.3
  • HealthShare Health Connect 2019.1.1
  • HealthShare Health Connect (HSAP) 15.032 on 2018.1.3
  • Caché and Ensemble 2018.1.3

In InterSystems IRIS and IRIS for Health, shadowing code is included, but it should not be used; InterSystems recommends using mirroring, which is not affected by this defect.

The defect occurs only on shadow servers (also known as shadow destinations); shadow sources are not impacted. All shadow servers are vulnerable to this defect.

The correction for this defect is identified as HYY2375, which will be included in all future releases of InterSystems IRIS, Caché, and Ensemble, and is available via ad hoc distribution from the Worldwide Response Center.

Latest Alerts & Advisories

Jul 24, 2025
InterSystems IRIS 2025.2 introduces the IRISSECURITY database, the new home for security data. Unlike IRISSYS, the previous home for security data, IRISSECURITY can be encrypted, which secures your sensitive data at rest. In a future version, IRISSECURITY will be mirrorable.
Jul 24, 2025
InterSystems is pleased to announce the General Availability (GA) of the 2025.2 release of InterSystems IRIS® data platform. This is a Continuous Delivery (CD) release. Please note that the GA versions of InterSystems IRIS for Health™ and HealthShare® Health Connect™ 2025.2 are currently withheld due to mirroring limitations introduced by security updates (details below).
Jun 11, 2025
Advisory ID Product & Versions Affected Risk Category & Score Explicit Requirements DP-439649 Products:
May 21, 2025
This issue affects all versions of HealthShare®:
May 21, 2025
This problem affects the following products: