Is CVE-2018-5159 being actively exploited?

CVE-2018-5159 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2018-5159?

CVE-2018-5159 has a CVSS 3.0 base score of 9.8 (CRITICAL).

CVE-2018-5159

CRITICAL · CVSS 9.8EPSS 21.0%EU EUVD

An integer overflow can occur in the Skia library due to 32-bit integer use in an array without integer overflow checks, resulting in possible out-of-bounds writes. This could lead to a potentially exploitable crash triggerable by web content. This vulnerability affects Thunderbird < 52.8, Thunderbird ESR < 52.8, Firefox < 60, and Firefox ESR < 52.8.

Key facts

CVSS score: 9.8 (v3.0)
Severity: CRITICAL
CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-190
EPSS score: 21.0% (98th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2018-16944)
Published: June 11, 2018
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2018-16944 in the EU Vulnerability Database. Last updated in EUVD on August 5, 2024.

View on the EU Vulnerability Database

Affected products

canonical / ubuntu linux
canonical / ubuntu linux
canonical / ubuntu linux
canonical / ubuntu linux
debian / debian linux
debian / debian linux
debian / debian linux
mozilla / firefox
mozilla / thunderbird
mozilla / thunderbird esr
redhat / enterprise linux desktop
redhat / enterprise linux desktop
redhat / enterprise linux server
redhat / enterprise linux server
redhat / enterprise linux server aus
redhat / enterprise linux server eus
redhat / enterprise linux server eus
redhat / enterprise linux server tus
redhat / enterprise linux workstation
redhat / enterprise linux workstation

Certified products that may be affected

1 FIPS 140 or Common Criteria certified product, from automated matching by sec-certs.org.

Red Hat Enterprise Linux 7.6 - Red Hat, Inc. - Common Criteria CCEVS-VR-VID-11039-2020 - archived

References

http://www.securityfocus.com/bid/104136(Third Party Advisory, VDB Entry)
http://www.securitytracker.com/id/1040896(Third Party Advisory, VDB Entry)
https://access.redhat.com/errata/RHSA-2018:1414(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2018:1415(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2018:1725(Third Party Advisory)
https://access.redhat.com/errata/RHSA-2018:1726(Third Party Advisory)
https://bugzilla.mozilla.org/show_bug.cgi?id=1441941(Issue Tracking, Permissions Required, Third Party Advisory)
https://lists.debian.org/debian-lts-announce/2018/05/msg00007.html(Mailing List, Third Party Advisory)
https://lists.debian.org/debian-lts-announce/2018/05/msg00013.html(Mailing List, Third Party Advisory)
https://security.gentoo.org/glsa/201810-01(Third Party Advisory)
https://security.gentoo.org/glsa/201811-13(Third Party Advisory)
https://usn.ubuntu.com/3645-1/(Third Party Advisory)
https://usn.ubuntu.com/3660-1/(Third Party Advisory)
https://www.debian.org/security/2018/dsa-4199(Third Party Advisory)
https://www.debian.org/security/2018/dsa-4209(Third Party Advisory)
https://www.exploit-db.com/exploits/44759/(Exploit, Third Party Advisory, VDB Entry)
https://www.mozilla.org/security/advisories/mfsa2018-11/(Vendor Advisory)
https://www.mozilla.org/security/advisories/mfsa2018-12/(Vendor Advisory)
https://www.mozilla.org/security/advisories/mfsa2018-13/(Vendor Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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