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InformationalMC1438566

(Updated) Action Required: Defer Upgrade to Microsoft Defender for Endpoint on Linux Build 101.26052.0009

Services: Microsoft Defender XDR· Published: 2026-07-24· MS modified: 2026-07-29
Updated messageAdmin impact

Microsoft announcement

Updated July 29, 2026: This message is no longer applicable and can be disregarded. We apologize for any inconvenience. 

[What and Why:]

We have identified an issue affecting Microsoft Defender for Endpoint on Linux build101.26052.0009 on a subset of FIPS-enabled Red Hat Enterprise Linux (RHEL) 8 and RHEL 9 devices. As a precaution, rollout of this build has been paused.

Current Status

We have paused the rollout and are actively working on a revised build. We will provide an update through the Message Center and release notes when the updated package becomes available.

[Rollout Schedule:]

Worldwide, GCC, GCC High, DoD): No longer applicable.

[Impact on your organization:]

Impact 

On affected devices, installation or upgrade of the platform package may fail, preventing successful completion of the update process.

[Action Required/Recommendations:]

What you need to do

  • Do not upgrade to build 101.26052.0009 at this time.
  • Customers who have already upgraded and are not experiencing issues do not need to take immediate action.

Change history