Windows HTTP/2 Rapid Reset denial of service

exploited in the wild · published 2023-10-10

An attacker can rapidly reset many HTTP/2 streams to exhaust server resources and cause denial of service. This was exploited in the wild from August through October 2023.

Fixed in: 10.0.22621.2428

CVE: CVE-2023-44487

Source: Microsoft (MSRC)

Am I affected?

You are affected if the installed version is older than 10.0.22621.2428. Check the version you have and update to 10.0.22621.2428 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 1516 and your operating system.