A use-after-free vulnerability can occur while editing events in form elements on a page, resulting in a potentially exploitable crash. This vulnerability affects Firefox ESR < 52.6 and Thunderbird < 52.6.
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Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-14. NVD baseline CVSS 9.8; sources differ by 0.0.
A use-after-free vulnerability can occur while editing events in form elements on a page, resulting in a potentially exploitable crash. This vulnerability affects Firefox ESR < 52.6 and Thunderbird < 52.6.
June 11, 2018
November 25, 2025
Affected: Red Hat Enterprise Linux 6 and Red Hat Enterprise Linux 7.
https://access.redhat.com/errata/RHSA-2018:0262Affected: Red Hat Enterprise Linux 6 and Red Hat Enterprise Linux 7.
https://access.redhat.com/errata/RHSA-2018:0122| Vendor / Ecosystem | Fixed in / Patch | Released | Source |
|---|---|---|---|
| ubuntu | xul-ext-lightning (1:52.6.0+build1-0ubuntu0.16.04.1) @ xenial | 2026-05-28 | ubuntu |
| redhat | thunderbird-0:52.6.0-1.el7_4 | 2018-02-01 | redhat |
| redhat | firefox-0:52.6.0-1.el7_4 | 2018-01-24 | redhat |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
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Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.
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CWE-416