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Vulnerability record · CVE-2018-18492 · published 28 February 2019

CVE-2018-18492: Mozilla firefox use after free vulnerability

Mozilla · Firefox

A use-after-free vulnerability can occur after deleting a selection element due to a weak reference to the select element in the options collection. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.4, Firefox ESR < 60.4, and Firefox < 64.

9.8 CVSS 3.0 Critical EPSS 9.6% · top 4.7% CWE-416 · Use after free
9.8CVSS 3.0 base score, v2 7.5
9.6%EPSS exploitation probability, 30 days
NoNot in CISA KEV
10Affected product versions listed by NVD
30References
17 Jun 2026Last modified by NVD

Description

A use-after-free vulnerability can occur after deleting a selection element due to a weak reference to the select element in the options collection. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.4, Firefox ESR < 60.4, and Firefox < 64.

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

Affected products

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

References

LinkTags
http://www.securityfocus.com/bid/106168 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2018:3831 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3833 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:0159 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:0160 Third Party Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1499861 Issue TrackingPermissions RequiredVendor Advisory
https://lists.debian.org/debian-lts-announce/2018/12/msg00002.html Mailing ListThird Party Advisory
https://security.gentoo.org/glsa/201903-04 Third Party Advisory
https://usn.ubuntu.com/3844-1/ Third Party Advisory
https://usn.ubuntu.com/3868-1/ Third Party Advisory
https://www.debian.org/security/2018/dsa-4354 Third Party Advisory
https://www.debian.org/security/2019/dsa-4362 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2018-29/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2018-30/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2018-31/ Vendor Advisory
http://www.securityfocus.com/bid/106168 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2018:3831 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3833 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:0159 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:0160 Third Party Advisory
https://bugzilla.mozilla.org/show_bug.cgi?id=1499861 Issue TrackingPermissions RequiredVendor Advisory
https://lists.debian.org/debian-lts-announce/2018/12/msg00002.html Mailing ListThird Party Advisory
https://security.gentoo.org/glsa/201903-04 Third Party Advisory
https://usn.ubuntu.com/3844-1/ Third Party Advisory
https://usn.ubuntu.com/3868-1/ Third Party Advisory
https://www.debian.org/security/2018/dsa-4354 Third Party Advisory
https://www.debian.org/security/2019/dsa-4362 Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2018-29/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2018-30/ Vendor Advisory
https://www.mozilla.org/security/advisories/mfsa2018-31/ Vendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2018-18492), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.