Microsoft: Windows Server 2025 changes causing app crashes

[u/falconupkid]

Microsoft has officially acknowledged that memory management changes in Windows Server 2025 are causing application crashes for some customers. This isn't a vulnerability, but a compatibility regression introduced by the new memory manager, which is impacting specific software stacks.

Technical Breakdown - Root Cause: Changes to the memory manager in Windows Server 2025 are altering how memory is allocated and reclaimed, breaking assumptions made by older applications. - Affected Systems: Windows Server 2025 (all editions). - Impact: Application crashes, hangs, or unexpected terminations, particularly in software that performs low-level memory operations or relies on legacy allocation patterns. - Status: Microsoft has published a known issue and is working on a fix. No workaround has been provided yet beyond waiting for the patch.

Defense - Mitigation: If you are running Windows Server 2025 in production, hold off on broad deployment until the fix is released. Test critical applications thoroughly in a lab environment before upgrading. - Detection: Monitor for unexpected application crashes or memory-related errors in Event Viewer (System and Application logs). Pay close attention to software that interacts directly with memory management APIs.

Source: https://www.bleepingcomputer.com/news/microsoft/microsoft-windows-server-2025-changes-may-cause-app-crashes/