Microsoft 365 Message Center item MC1438566

MC1438566 - (Updated) Action Required: Defer Upgrade to Microsoft Defender for Endpoint on Linux Build 101.26052.0009

The upgrade to Microsoft Defender for Endpoint on Linux build 101.26052.0009 for FIPS-enabled RHEL 8 and 9 devices has been paused due to issues. The message is now outdated and can be disregarded. No action is needed if already upgraded without problems.

Message Center ID

MC1438566

Category

prevent Or Fix Issue

Severity

normal

Services

Microsoft Defender XDR

Tags

Updated message, Admin impact

Published

2026-07-24

Last updated

2026-07-29

Expires

2026-07-31

Updated July 29, 2026: This message is no longer applicable and can be disregarded.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 StatusWe 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Center and release notes when the updated package becomes available.[Rollout Schedule:]Worldwide, GCC, GCC High, DoD): No longer applicable.[Impact on your organization:]Impact On affected devices, installation or upgrade of the platform package may fail, preventing successful completion of the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 doDo 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.