---
title: "CVE-2018-12371\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-2018-12371?format=md
keywords: index, follow
---

# CVE-2018-12371

Publication date 27 June 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-2018-12371?format=md#impact-score)

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## Description

An integer overflow vulnerability in the Skia library when allocating
memory for edge builders on some systems with at least 16 GB of RAM. This
results in the use of uninitialized memory, resulting in a potentially
exploitable crash. This vulnerability affects Firefox ESR < 60.1,
Thunderbird < 60, and Firefox < 61.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| firefox | 18.04 LTS bionic | Fixed 61.0+build3-0ubuntu0.18.04.1 |
| 17.10 artful | Fixed 61.0+build3-0ubuntu0.17.10.1 |
| 16.04 LTS xenial | Fixed 61.0+build3-0ubuntu0.16.04.2 |
| 14.04 LTS trusty | Fixed 61.0+build3-0ubuntu0.14.04.2 |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## 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:3.1/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-2018-12371)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2018-12371)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2018-12371)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2018-12371)

### Related Ubuntu Security Notices (USN)

+ [USN-3705-1](https://usn.ubuntu.com/USN-3705-1)
+ Firefox vulnerabilities
+ 5 July 2018

### Other references

* <https://www.mozilla.org/en-US/security/advisories/mfsa2018-15/#CVE-2018-12371>
* <https://www.cve.org/CVERecord?id=CVE-2018-12371>