MWPRO IMPACT SCORE
OPERATIONAL IMPACT
38
0
25
50
75
100
MODERATE IMPACT • ASSESS BUSINESS IMPACT
Recommended Action:
Take a look and decide whether this affects your tenant, users or support teams.
Take a look and decide whether this affects your tenant, users or support teams.
What is MWPro Impact Score?
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Primary Audience
Tenant AdminsMicrosoft 365 AdminsSecurity TeamsIT ManagersService Owners
Why this score?
AI Confidence
HIGH
Enough detail is available to trust this assessment.
Assessment Reasoning
Rollout of build 101.26052.0009 for Defender on Linux has been paused due to issues on FIPS-enabled RHEL 8/9. Admins need to halt upgrades and track for the revised package, with some review of device state required. Impact is mainly operational for security and endpoint teams, with minimal direct user effect. Urgency is moderate because incorrect upgrades could fail and new guidance is expected soon.
40
Admin Impact
10
User Impact
55
Urgency
35
Effort
WHAT YOU NEED TO KNOW
AT A GLANCE
Rollout of Defender for Endpoint on Linux build 101.26052.0009 is paused due to issues on FIPS-enabled RHEL 8 and 9 devices.
END USERS
No major end-user change expected.
IT ADMINS
Avoid upgrading to build 101.26052.0009 on affected Linux devices until a revised build is released.
ROLLOUT TIMELINE
Rolling out:
Paused mid-July 2026
Paused mid-July 2026
📢 Official Microsoft Message Center Announcement
Action Required: Defer Upgrade to Microsoft Defender for Endpoint on Linux Build 101.26052.0009
Message ID: MC1438566
[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.
Source: Microsoft Message Center • Analysed by MWPro
