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Vulnerability record · CVE-2018-5093 · published 11 June 2018

CVE-2018-5093: Mozilla firefox memory buffer overflow vulnerability

Mozilla · Firefox

A heap buffer overflow vulnerability may occur in WebAssembly during Memory/Table resizing, resulting in a potentially exploitable crash. This vulnerability affects Firefox < 58.

7.5 CVSS 3.0 High EPSS 20% · top 2.7% CWE-119 · Memory buffer overflow
7.5CVSS 3.0 base score, v2 5.0
20%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
10References
17 Jun 2026Last modified by NVD

Description

A heap buffer overflow vulnerability may occur in WebAssembly during Memory/Table resizing, resulting in a potentially exploitable crash. This vulnerability affects Firefox < 58.

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

Affected products

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

References

LinkTags
http://www.securityfocus.com/bid/102786 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1040270 Third Party AdvisoryVDB Entry
https://bugzilla.mozilla.org/show_bug.cgi?id=1415291 Issue TrackingPermissions Required
https://usn.ubuntu.com/3544-1/ Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2018-02/ Vendor Advisory
http://www.securityfocus.com/bid/102786 Third Party AdvisoryVDB Entry
http://www.securitytracker.com/id/1040270 Third Party AdvisoryVDB Entry
https://bugzilla.mozilla.org/show_bug.cgi?id=1415291 Issue TrackingPermissions Required
https://usn.ubuntu.com/3544-1/ Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2018-02/ Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2018-5093), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.