tech-briefing · · 2 min read

September Windows Server updates break remote desktop services

By Lawrence Abrams

September Windows Server updates break remote desktop services

In some cases, administrators have identified

In September 2026, Windows Server system administrators reported a critical issue affecting the Remote Desktop Service (RDS) on several operating system versions, including Windows Server 2019, 2022 and 2025. This functionality deterioration occurred immediately after installing the monthly cumulative updates, published during the Patch Tuesday event, and resulted in the inability of users to view remote sessions, sometimes requiring a forced re-connection of the server to regain control.

In some cases, administrators have identified, through de-locking tools, a deadlock (deadlock) between the components of the RDP service and the Local Session Manager (LSM), specifically at RDPSERVERBASE! WDLIB_Close, where there appears to be no adequate timeout mechanism. This observation was made by an administrator investigating a server with Windows Server 2022 and reported the problem on Reddit, pointing out that the lack of a timeout in this routine leads to a stalemate between critical processes. However, Microsoft has not officially confirmed this hypothesis as the root cause of the failure.

The administrators who decided

BleepingComputer has received testimonies from other readers that describe identical scenarios: all servers in the original version may have started to fail within their original version of the RDS service, but the first update of the service has not been fully implemented, and the first update of the RDS service has been announced, with the possibility of a full recovery of the hardware, and the first update of the service being released a few days after the release of the original version, and the first update of the RDS service being released, and the first update of the update, which was that the service was not fully functional.

The administrators who decided to cancel the installation of these patches have confirmed that the RDS functionality has been fully restored. However, this action has a significant cost: removing the September 2026 updates removed and the critical security patches included in this package, leaving the systems exposed to known vulnerabilities. This dilemma between functionality and protection has made it difficult for many IT teams, who are forced to choose between the risks of downtime and loss of productivity. BleepingComputer has tried to get an official comment from Microsoft on these issues, but at the time of publication has received no response. The editorial stated that the article will immediately receive additional information about the patch in the software.

More stories:

Content written by Lawrence Abrams for techbriefe.com editorial team, AI-assisted.

Share:

Leave a comment