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Vulnerability record · CVE-2018-12386 · published 18 October 2018

CVE-2018-12386: Redhat enterprise linux desktop vulnerability

Redhat · Enterprise Linux Desktop

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.

8.1 CVSS 3.0 High EPSS 13% · top 3.7% CWE-704 · CWE-704
8.1CVSS 3.0 base score, v2 5.8
13%EPSS exploitation probability, 30 days
NoNot in CISA KEV
9Affected product versions listed by NVD
18References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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.

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

Affected products

9 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Source: NIST National Vulnerability Database (record CVE-2018-12386), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.