---
title: "CVE-2019-11023\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-2019-11023?format=md
keywords: index, follow
---

# CVE-2019-11023

Publication date 8 April 2019

Last updated 25 August 2025

---

Ubuntu priority

**Low**

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

## Cvss 3 Severity Score

**8.8 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2019-11023?format=md#impact-score)

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## Description

The agroot() function in cgraph\obj.c in libcgraph.a in Graphviz
2.39.20160612.1140 has a NULL pointer dereference, as demonstrated by
graphml2gv.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| graphviz | 23.04 lunar | Not affected |
| 22.10 kinetic | Not affected |
| 22.04 LTS jammy | Not affected |
| 21.10 impish | Ignored end of life |
| 21.04 hirsute | Ignored end of life |
| 20.10 groovy | Ignored end of life |
| 20.04 LTS focal | Not affected |
| 19.10 eoan | Ignored end of life |
| 19.04 disco | Ignored end of life |
| 18.10 cosmic | Ignored end of life |
| 18.04 LTS bionic | Fixed 2.40.1-2ubuntu0.1~esm1  Ubuntu Pro |
| 16.04 LTS xenial | Fixed 2.38.0-12ubuntu2.1+esm1  Ubuntu Pro |
| 14.04 LTS trusty | Fixed 2.36.0-0ubuntu3.2+esm1  Ubuntu Pro |

---

* [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-2019-11023?format=md#patch-details)

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### 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 |
| --- | --- |
| graphviz | * Upstream:   [839085f](https://gitlab.com/graphviz/graphviz/-/commit/839085f8026afd6f6920a0c31ad2a9d880d97932) |

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

8.8 · High

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 8.8 · High |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11023)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2019-11023)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2019-11023)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2019-11023)

### Related Ubuntu Security Notices (USN)

+ [USN-5264-1](https://usn.ubuntu.com/USN-5264-1)
+ Graphviz vulnerabilities
+ 3 February 2022

+ [USN-5971-1](https://usn.ubuntu.com/USN-5971-1)
+ Graphviz vulnerabilities
+ 24 March 2023

### Other references

* <https://research.loginsoft.com/bugs/null-pointer-dereference-in-function-agroot/>
* <https://www.cve.org/CVERecord?id=CVE-2019-11023>