What’s Vulnerable › Vulnerabilities

CVE-2018-5183

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2018-06-11 · updated 2026-06-17
• Weakness: CWE-119

Description

Mozilla developers backported selected changes in the Skia library. These changes correct memory corruption issues including invalid buffer reads and writes during graphic operations. This vulnerability affects Thunderbird ESR < 52.8, Thunderbird < 52.8, and Firefox ESR < 52.8.

Affected products

• Canonical Ubuntu Linux: 14.04, 16.04, 17.10, 18.04
• Debian Linux: 7.0, 8.0, 9.0
• Mozilla Firefox: before 52.8.0 — fixed in 52.8.0
• Mozilla Thunderbird: before 52.8.0 — fixed in 52.8.0
• Mozilla Thunderbird ESR: before 52.8.0 — fixed in 52.8.0
• RedHat Enterprise Linux Desktop: 6.0, 7.0
• RedHat Enterprise Linux Server: 6.0, 7.0
• RedHat Enterprise Linux Server Aus: 7.6
• RedHat Enterprise Linux Server Eus: 7.5, 7.6
• RedHat Enterprise Linux Server Tus: 7.6
• RedHat Enterprise Linux Workstation: 6.0, 7.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 52.8.0; Mozilla Thunderbird 52.8.0; Mozilla Thunderbird ESR 52.8.0. Check the vendor advisory for mitigations.

References

• http://www.securityfocus.com/bid/104138
• http://www.securitytracker.com/id/1040898
• https://access.redhat.com/errata/RHSA-2018:1414
• https://access.redhat.com/errata/RHSA-2018:1415
• https://access.redhat.com/errata/RHSA-2018:1725
• https://access.redhat.com/errata/RHSA-2018:1726
• https://bugzilla.mozilla.org/show_bug.cgi?id=1454692
• https://lists.debian.org/debian-lts-announce/2018/05/msg00007.html
• https://lists.debian.org/debian-lts-announce/2018/05/msg00013.html
• https://security.gentoo.org/glsa/201810-01
• https://security.gentoo.org/glsa/201811-13
• https://usn.ubuntu.com/3660-1/

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