What’s Vulnerable › Vulnerabilities

CVE-2018-5148

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.9% 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-416

Description

A use-after-free vulnerability can occur in the compositor during certain graphics operations when a raw pointer is used instead of a reference counted one. This results in a potentially exploitable crash. This vulnerability affects Firefox ESR < 52.7.3 and Firefox < 59.0.2.

Affected products

• Canonical Ubuntu Linux: 14.04, 16.04, 17.10
• Debian Linux: 7.0, 8.0, 9.0
• Mozilla Firefox: before 59.0.2; before 52.7.3 — fixed in 52.7.3, 59.0.2
• RedHat Enterprise Linux Desktop: 6.0, 7.0
• RedHat Enterprise Linux Server: 6.0, 7.0
• RedHat Enterprise Linux Server Eus: 7.5
• RedHat Enterprise Linux Workstation: 6.0, 7.0

How to fix

Upgrade to a fixed version: Mozilla Firefox 52.7.3, 59.0.2. Check the vendor advisory for mitigations.

References

• http://www.securityfocus.com/bid/103506
• http://www.securitytracker.com/id/1040574
• https://access.redhat.com/errata/RHSA-2018:1098
• https://access.redhat.com/errata/RHSA-2018:1099
• https://bugzilla.mozilla.org/show_bug.cgi?id=1440717
• https://lists.debian.org/debian-lts-announce/2018/03/msg00023.html
• https://usn.ubuntu.com/3609-1/
• https://www.debian.org/security/2018/dsa-4153
• https://www.mozilla.org/security/advisories/mfsa2018-10/
• http://www.securityfocus.com/bid/103506
• http://www.securitytracker.com/id/1040574
• https://access.redhat.com/errata/RHSA-2018:1098

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