Public Date:
1635451: CVE-2018-12386 Mozilla: type confusion in JavaScript

The MITRE CVE dictionary describes this issue as:

A vulnerability in register allocation in JavaScript can lead to type confusion, allowing for an arbitrary read and write. This leads to remote code execution inside the sandboxed content process when triggered. This vulnerability affects Firefox ESR < 60.2.2 and Firefox < 62.0.3.

Find out more about CVE-2018-12386 from the MITRE CVE dictionary dictionary and NIST NVD.

CVSS v3 metrics

NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.

CVSS3 Base Score 8.8
CVSS3 Base Metrics CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality High
Integrity Impact High
Availability Impact High

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux 7 (firefox) RHSA-2018:2884 2018-10-08
Red Hat Enterprise Linux 6 (firefox) RHSA-2018:2881 2018-10-08

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 7 thunderbird Not affected
Red Hat Enterprise Linux 6 thunderbird Not affected


Red Hat would like to thank the Mozilla project for reporting this issue. Upstream acknowledges Niklas Baumstark, Samuel Groß, and Bruno Keith via Beyond Security's SecuriTeam Secure Disclosure program as the original reporters.

External References

Last Modified

CVE description copyright © 2017, The MITRE Corporation