CVE-2026-27921

Name of the Vulnerable Software and Affected Versions Windows TCP/IP (affected versions not specified)

Description A race condition occurs in the Windows TCP/IP stack, specifically within the tdx.sys translation driver. This issue is a Time-of-Check to Time-of-Use (TOCTOU) flaw, where concurrent execution using a shared resource with improper synchronization allows an authorized attacker with local access to elevate privileges to the kernel level.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.