---
title: "CVE-2019-9814\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-2019-9814?format=md
keywords: index, follow
---

# CVE-2019-9814

Publication date 21 May 2019

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**9.8 · Critical**

[Score breakdown](https://ubuntu.com/security/CVE-2019-9814?format=md#impact-score)

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## Description

Mozilla developers and community members reported memory safety bugs
present in Firefox 66. Some of these bugs showed evidence of memory
corruption and we presume that with enough effort that some of these could
be exploited to run arbitrary code. This vulnerability affects Firefox <
67.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2019-9814?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| firefox | 24.04 LTS noble | Fixed 67.0+build2-0ubuntu1 |
| 23.10 mantic | Fixed 67.0+build2-0ubuntu1 |
| 23.04 lunar | Fixed 67.0+build2-0ubuntu1 |
| 22.10 kinetic | Fixed 67.0+build2-0ubuntu1 |
| 22.04 LTS jammy | Fixed 67.0+build2-0ubuntu1 |
| 21.10 impish | Fixed 67.0+build2-0ubuntu1 |
| 21.04 hirsute | Fixed 67.0+build2-0ubuntu1 |
| 20.10 groovy | Fixed 67.0+build2-0ubuntu1 |
| 20.04 LTS focal | Fixed 67.0+build2-0ubuntu1 |
| 19.10 eoan | Fixed 67.0+build2-0ubuntu1 |
| 19.04 disco | Fixed 67.0+build2-0ubuntu0.19.04.1 |
| 18.10 cosmic | Fixed 67.0+build2-0ubuntu0.18.10.1 |
| 18.04 LTS bionic | Fixed 67.0+build2-0ubuntu0.18.04.1 |
| 16.04 LTS xenial | Fixed 67.0+build2-0ubuntu0.16.04.1 |
| 14.04 LTS trusty | Not in release |
| mozjs38 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 23.04 lunar | Not in release |
| 22.10 kinetic | Not in release |
| 22.04 LTS jammy | Not in release |
| 21.10 impish | Not in release |
| 21.04 hirsute | Not in release |
| 20.10 groovy | Not in release |
| 20.04 LTS focal | Not in release |
| 19.10 eoan | Not in release |
| 19.04 disco | Not in release |
| 18.10 cosmic | Not in release |
| 18.04 LTS bionic | Ignored |
| 16.04 LTS xenial | Not in release |
| 14.04 LTS trusty | Not in release |
| mozjs52 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 23.04 lunar | Not in release |
| 22.10 kinetic | Not in release |
| 22.04 LTS jammy | Not in release |
| 21.10 impish | Not in release |
| 21.04 hirsute | Not in release |
| 20.10 groovy | Ignored end of life |
| 20.04 LTS focal | Ignored |
| 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 | Ignored |
| 16.04 LTS xenial | Not in release |
| 14.04 LTS trusty | Not in release |
| mozjs60 | 24.04 LTS noble | Not in release |
| 23.10 mantic | Not in release |
| 23.04 lunar | Not in release |
| 22.10 kinetic | Not in release |
| 22.04 LTS jammy | Not in release |
| 21.10 impish | Not in release |
| 21.04 hirsute | Not in release |
| 20.10 groovy | Not in release |
| 20.04 LTS focal | Not in release |
| 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 | Not in release |
| 16.04 LTS xenial | Not in release |
| 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)

## Notes

---

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

mozjs contains a copy of the SpiderMonkey JavaScript engine

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

9.8 · Critical

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 9.8 · Critical |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9814)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2019-9814)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2019-9814)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2019-9814)

### Related Ubuntu Security Notices (USN)

+ [USN-3991-1](https://usn.ubuntu.com/USN-3991-1)
+ Firefox vulnerabilities
+ 21 May 2019

### Other references

* <https://www.mozilla.org/en-US/security/advisories/mfsa2019-13/#CVE-2019-9814>
* <https://www.cve.org/CVERecord?id=CVE-2019-9814>