CVE-2026-21241

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

Description A use-after-free condition exists in the Windows Ancillary Function Driver for WinSock, specifically within the afd.sys file. This issue allows an authorized attacker to elevate privileges locally. The vulnerability is related to memory management and occurs when memory is accessed after it has been freed. Exploitation of this issue can allow an attacker to affect the system. Research indicates the vulnerability was discovered through exploration of Windows I/O completion internals.

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