Summary
- Microsoft has paused rollout of Microsoft Defender for Endpoint on Linux build 101.26052.0009 due to an issue affecting a subset of FIPS-enabled Red Hat Enterprise Linux 8 and 9 devices.
- On affected devices, installation or upgrade of the platform package may fail, preventing the update from completing successfully.
- Admins should not deploy or upgrade to build 101.26052.0009 until Microsoft releases the revised package.
- Organizations that already upgraded and are not seeing issues do not need to take immediate action.
Primary Service: Defender
Admin Impact: High
User Impact: Low
Release Start: 15 Jul 2026
Release End: 31 Jul 2026
Services: Defender XDR
Category: Prevent or fix issues
Tags: Admin Action, Highlighted
History
7/24/2026 Item Added to Message Center
Microsoft Message
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): We will begin rolling out on mid-July 2026 and expect to complete by late July 2026.
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.