Summary
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 The message is now outdated and can be disregarded.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.
Details
Updated July 29, 2026: This message is no longer applicable and can be disregarded.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Worldwide, GCC, GCC High, DoD): No longer applicable.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
July 29, 2026 at 8:31 PM
Updated
Title
Previous
Action Required: Defer Upgrade to Microsoft Defender for Endpoint on Linux Build 101.26052.0009
New
(Updated) Action Required: Defer Upgrade to Microsoft Defender for Endpoint on Linux Build 101.26052.0009
Summary
Previous
Do not upgrade to Microsoft Defender for Endpoint on Linux build 101.26052.0009 due to issues on FIPS-enabled RHEL 8 and 9 devices. Rollout is paused; a revised build will be released by late July 2026. Those without issues after upgrading need no immediate action.
New
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 The message is now outdated and can be disregarded.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.
Last Updated Date
Previous
2026-07-24T21:53:42.140Z
New
2026-07-29T18:39:24.170Z
Tags
Previous
Admin impact
New
Updated message,Admin impact
Body Content
Previous
<p>[What and Why:]</p><p></p>We have identified an issue affecting Microsoft Defender for Endpoint on Linux build<b>101.26052.0009</b> on a subset of <b>FIPS-enabled Red Hat Enterprise Linux (RHEL) 8 and RHEL 9</b> devices. As a precaution, rollout of this build has been paused.<p></p><p><b>Current Status</b></p><p>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.</p><p>[Rollout Schedule:]</p><p>Worldwide, GCC, GCC High, DoD): We will begin rolling out on mid-July 2026 and expect to complete by late July 2026.</p><p>[Impact on your organization:]</p><p><b>Impact</b> </p><p>On affected devices, installation or upgrade of the platform package may fail, preventing successful completion of the update process.</p><p>[Action Required/Recommendations:]</p><p><b>What you need to do</b></p><ul><li>Do not upgrade to build <b>101.26052.0009</b> at this time.</li><li>Customers who have already upgraded and are not experiencing issues do not need to take immediate action.</li></ul>
New
<p>Updated July 29, 2026: This message is no longer applicable and can be disregarded. We apologize for any inconvenience. </p><p>[What and Why:]</p><p></p>We have identified an issue affecting Microsoft Defender for Endpoint on Linux build<strong>101.26052.0009</strong> on a subset of <strong>FIPS-enabled Red Hat Enterprise Linux (RHEL) 8 and RHEL 9</strong> devices. As a precaution, rollout of this build has been paused.<p></p><p><strong>Current Status</strong></p><p>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.</p><p>[Rollout Schedule:]</p><p>Worldwide, GCC, GCC High, DoD): No longer applicable.</p><p>[Impact on your organization:]</p><p><strong>Impact</strong> </p><p>On affected devices, installation or upgrade of the platform package may fail, preventing successful completion of the update process.</p><p>[Action Required/Recommendations:]</p><p><strong>What you need to do</strong></p><ul><li>Do not upgrade to build <strong>101.26052.0009</strong> at this time.</li><li>Customers who have already upgraded and are not experiencing issues do not need to take immediate action.</li></ul>
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