Linux kernel crypto socket race condition, exploited

high severity · exploited in the wild · published 2025-10-13

A race condition in the kernel's crypto socket interface lets concurrent writes corrupt the socket's internal state. It is already being exploited in the wild.

Fixed in: 6.16.9

CVE: CVE-2025-39964

Source: OSV

Am I affected?

You are affected if the installed version is older than 6.16.9. Check the version you have and update to 6.16.9 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 1876 and your operating system.