What’s Vulnerable › Vulnerabilities

CVE-2018-12386

• Severity: high (CVSS 8.1 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 13.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2018-10-18 · updated 2026-06-17
• Weakness: CWE-704

Description

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.

Affected products

• Canonical Ubuntu Linux: 14.04, 16.04, 18.04
• Debian Linux: 9.0
• Mozilla Firefox: before 60.2.2; before 62.0.3 — fixed in 60.2.2, 62.0.3
• RedHat Enterprise Linux Desktop: 6.0, 7.0
• RedHat Enterprise Linux Server: 6.0, 7.0
• RedHat Enterprise Linux Server Aus: 7.6
• RedHat Enterprise Linux Server Eus: 7.5, 7.6
• RedHat Enterprise Linux Server Tus: 7.6
• RedHat Enterprise Linux Workstation: 6.0, 7.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 60.2.2, 62.0.3. Check the vendor advisory for mitigations.

References

• http://www.securityfocus.com/bid/105460
• http://www.securitytracker.com/id/1041770
• https://access.redhat.com/errata/RHSA-2018:2881
• https://access.redhat.com/errata/RHSA-2018:2884
• https://bugzilla.mozilla.org/show_bug.cgi?id=1493900
• https://security.gentoo.org/glsa/201810-01
• https://usn.ubuntu.com/3778-1/
• https://www.debian.org/security/2018/dsa-4310
• https://www.mozilla.org/security/advisories/mfsa2018-24/
• http://www.securityfocus.com/bid/105460
• http://www.securitytracker.com/id/1041770
• https://access.redhat.com/errata/RHSA-2018:2881

Get alerted when CVE-2018-12386 or the next vulnerability affects your stack