Windows WinSock driver use-after-free allows privilege escalation

high severity · exploited in the wild · published 2026-08-11

A use-after-free in the Windows Ancillary Function Driver for WinSock lets an authorized local attacker raise their privileges. It is already being exploited in the wild.

Fixed in: 10.0.28000.2704

CVE: CVE-2026-68820

Source: Microsoft (MSRC)

Am I affected?

You are affected if the installed version is older than 10.0.28000.2704. Check the version you have and update to 10.0.28000.2704 or later. The fixed version is verified against a vendor or advisory source.

Get the fix

FixLane has a reviewed fix procedure for this incident: a read-only check first, then the fix. Ask the Telegram bot, or connect an AI agent to the FixLane MCP server and call get_fix_prompt with incident id 1869 and your operating system.