CVE-2026-20831

Name of the Vulnerable Software and Affected Versions Windows Ancillary Function Driver for WinSock (affected versions not specified)

Description A time-of-check time-of-use (TOCTOU) race condition exists in the Windows Ancillary Function Driver for WinSock. This condition allows a locally authorized attacker to elevate privileges. The issue arises from a timing window where a check is performed, and the state changes before the operation is carried out, potentially leading to unintended consequences.

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