---
title: "CVE-2020-12430\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2020-12430?format=md
keywords: index, follow
---

# CVE-2020-12430

Publication date 28 April 2020

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**6.5 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2020-12430?format=md#impact-score)

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## Description

An issue was discovered in qemuDomainGetStatsIOThread in qemu/qemu\_driver.c
in libvirt 4.10.0 though 6.x before 6.1.0. A memory leak was found in the
virDomainListGetStats libvirt API that is responsible for retrieving domain
statistics when managing QEMU guests. This flaw allows unprivileged users
with a read-only connection to cause a memory leak in the domstats command,
resulting in a potential denial of service.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2020-12430?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| libvirt | 20.04 LTS focal | Fixed 6.0.0-0ubuntu6 |
| 19.10 eoan | Fixed 5.4.0-0ubuntu5.4 |
| 18.04 LTS bionic | Not affected |
| 16.04 LTS xenial | Not affected |
| 14.04 LTS trusty | Not affected |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)
* [Patch details](https://ubuntu.com/security/CVE-2020-12430?format=md#patch-details)

## Notes

---

### [mdeslaur](https://launchpad.net/~mdeslaur)

lp-1868539-qemuDomainGetStatsIOThread-Don-t-leak-array-with-0-i.patch
in focal/groovy

### Patch details

For informational purposes only. We recommend not to cherry-pick updates. [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)

| Package | Patch details |
| --- | --- |
| libvirt | * Upstream:   <https://libvirt.org/git/?p=libvirt.git;a=commit;h=9bf9e0ae6af38c806f4672ca7b12a6b38d5a9581> |

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

6.5 · Medium

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Network |
  | Attack complexity | Low |
  | Privileges required | Low |
  | User interaction | None |
  | Scope | Unchanged |
  | Confidentiality impact | None |
  | Integrity impact | None |
  | Availability impact | High |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 6.5 · Medium |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-12430)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2020-12430)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2020-12430)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2020-12430)

### Related Ubuntu Security Notices (USN)

+ [USN-4371-1](https://usn.ubuntu.com/USN-4371-1)
+ libvirt vulnerabilities
+ 21 May 2020

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2020-12430>