vulnerability

Red Hat: CVE-2025-14333: firefox: Memory safety bugs fixed in Firefox ESR 140.6, Thunderbird ESR 140.6, Firefox 146 and Thunderbird 146 (Multiple Advisories)

Name: Red Hat: CVE-2025-14333: firefox: Memory safety bugs fixed in Firefox ESR 140.6, Thunderbird ESR 140.6, Firefox 146 and Thunderbird 146 (Multiple Advisories)
Creator: Red Hat
Published: 2025-12-09T00:00:00.000Z
Keywords: CVE, CWE-119, CWE-787, Red Hat, 2025, 14333, firefox, redhat-upgrade-firefox, redhat-upgrade-firefox-debuginfo, redhat-upgrade-firefox-debugsource, redhat-upgrade-firefox-x11, redhat-upgrade-thunderbird, redhat-upgrade-thunderbird-debuginfo, redhat-upgrade-thunderbird-debugsource, Severity 6

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Severity

CVSS

(AV:N/AC:M/Au:N/C:P/I:P/A:N)

Published

Dec 9, 2025

Added

Dec 11, 2025

Modified

May 13, 2026

Description

Memory safety bugs present in Firefox ESR 140.5, Thunderbird ESR 140.5, Firefox 145 and Thunderbird 145. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 146, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.

Solutions

redhat-upgrade-firefoxredhat-upgrade-firefox-debuginforedhat-upgrade-firefox-debugsourceredhat-upgrade-firefox-x11redhat-upgrade-thunderbirdredhat-upgrade-thunderbird-debuginforedhat-upgrade-thunderbird-debugsource

References

Rapid7 Labs

2026 Global Threat Landscape Report

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