Windows Kernel: data leak (CVE-2021-31955)

medium severity · exploited in the wild · published 2021-06-08

An attacker can read data that should stay private, which makes follow-up attacks easier. Attackers already use this flaw in the wild.

Fixed in: 10.0.19043.1052

CVE: CVE-2021-31955

Source: Microsoft (MSRC)

Am I affected?

You are affected if the installed version is older than 10.0.19043.1052. Check the version you have and update to 10.0.19043.1052 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 1461 and your operating system.