---
title: "CVE-2018-19870\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-2018-19870?format=md
keywords: index, follow
---

# CVE-2018-19870

Publication date 26 December 2018

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**8.8 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2018-19870?format=md#impact-score)

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## Description

An issue was discovered in Qt before 5.11.3. A malformed GIF image causes a
NULL pointer dereference in QGifHandler resulting in a segmentation fault.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| qtbase-opensource-src | 19.04 disco | Fixed 5.11.3+dfsg-2ubuntu1 |
| 18.10 cosmic | Fixed 5.11.1+dfsg-7ubuntu3.1 |
| 18.04 LTS bionic | Fixed 5.9.5+dfsg-0ubuntu2.1 |
| 16.04 LTS xenial | Fixed 5.5.1+dfsg-16ubuntu7.6 |
| 14.04 LTS trusty | Not in release |

---

* [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-2018-19870?format=md#patch-details)

### 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 |
| --- | --- |
| qtbase-opensource-src | * Upstream:   <https://codereview.qt-project.org/gitweb?p=qt%2Fqtbase.git;a=commit;h=2841e2b61e32f26900bde987d469c8b97ea31999> |

## 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-2018-19870)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2018-19870)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2018-19870)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2018-19870)

### Related Ubuntu Security Notices (USN)

+ [USN-4003-1](https://usn.ubuntu.com/USN-4003-1)
+ Qt vulnerabilities
+ 3 June 2019

### Other references

* <https://blog.qt.io/blog/2018/12/04/qt-5-11-3-released-important-security-updates/>
* <https://codereview.qt-project.org/#/c/235998/>
* <https://www.cve.org/CVERecord?id=CVE-2018-19870>