CVE-2018-5101

Name: CVE-2018-5101
Creator: NVD / NIST
Published: 2018-06-11T21:29:12.797+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.82%

Last modified Jun 17, 2026

CVE-2018-5101 is a vulnerability of currently unknown severity. A use-after-free vulnerability can occur when manipulating floating "first-letter" style elements, resulting in a potentially exploitable crash. This vulnerability affects Firefox < 58.. EPSS estimates a 1.82% chance of exploitation in the next 30 days.

Description

A use-after-free vulnerability can occur when manipulating floating "first-letter" style elements, resulting in a potentially exploitable crash. This vulnerability affects Firefox < 58.

Metrics

EPSS Probability

1.82%

76.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-416

Affected Software

Vendor	Product	Versions
Mozilla	Firefox	<= 57.0.4
Canonical	Ubuntu Linux	14.04
Canonical	Ubuntu Linux	16.04
Canonical	Ubuntu Linux	17.10

References

http://www.securityfocus.com/bid/102786Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1040270Third Party Advisory, VDB Entry
https://bugzilla.mozilla.org/show_bug.cgi?id=1417661Issue Tracking, Permissions 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/102786Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1040270Third Party Advisory, VDB Entry
https://bugzilla.mozilla.org/show_bug.cgi?id=1417661Issue Tracking, Permissions Required
https://usn.ubuntu.com/3544-1/Third Party Advisory
https://www.mozilla.org/security/advisories/mfsa2018-02/Vendor Advisory

Timeline

Published: Jun 11, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-5101?

A use-after-free vulnerability can occur when manipulating floating "first-letter" style elements, resulting in a potentially exploitable crash. This vulnerability affects Firefox < 58.

How severe is CVE-2018-5101?

Severity scoring for CVE-2018-5101 is pending analysis. The EPSS model estimates a 1.82% probability of exploitation in the next 30 days.

How do I fix CVE-2018-5101?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-5101?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST