Use After Free Affecting firefox-esr package, versions <52.6.0esr-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published22 Jul 2026
- disclosed11 Jun 2018
Introduced: 11 Jun 2018
CVE-2018-5104 (opens in a new tab)How to fix?
Upgrade Echo:latest firefox-esr to version 52.6.0esr-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream firefox-esr package and not the firefox-esr package as distributed by Echo.
See How to fix? for Echo:latest relevant fixed versions and status.
A use-after-free vulnerability can occur during font face manipulation when a font face is freed while still in use, resulting in a potentially exploitable crash. This vulnerability affects Thunderbird < 52.6, Firefox ESR < 52.6, and Firefox < 58.
References
- https://advisory.echohq.com/cve/CVE-2018-5104
- http://www.securityfocus.com/bid/102783
- http://www.securitytracker.com/id/1040270
- https://access.redhat.com/errata/RHSA-2018:0122
- https://access.redhat.com/errata/RHSA-2018:0262
- https://bugzilla.mozilla.org/show_bug.cgi?id=1425000
- https://lists.debian.org/debian-lts-announce/2018/01/msg00030.html
- https://lists.debian.org/debian-lts-announce/2018/01/msg00036.html
- https://usn.ubuntu.com/3544-1/
- https://www.debian.org/security/2018/dsa-4096
- https://www.debian.org/security/2018/dsa-4102
- https://www.mozilla.org/security/advisories/mfsa2018-02/
- https://www.mozilla.org/security/advisories/mfsa2018-03/
- https://www.mozilla.org/security/advisories/mfsa2018-04/