Sandbox escape due to undefined behavior, invalid pointer in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 143, Firefox ESR 140.3, Thunderbird 143, and Thunderbird 140.3.
CVSS Details
- CVSS 3.1 Base Score: 7.3
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | alma-upgrade-firefoxalma-upgrade-firefox-x11alma-upgrade-thunderbird | Sep 29, 2025 | Sep 22, 2025 | |
| Amazon Linux Ami 2 | amazon-linux-ami-2-upgrade-firefoxamazon-linux-ami-2-upgrade-thunderbird | May 20, 2026 | May 20, 2026 | |
| Amazon_linux_2023 | amazon-linux-2023-upgrade-firefoxamazon-linux-2023-upgrade-firefox-debuginfoamazon-linux-2023-upgrade-firefox-debugsource | Sep 30, 2025 | Sep 16, 2025 | |
| Debian | debian-upgrade-firefox-esrdebian-upgrade-thunderbird | Sep 22, 2025 | Sep 22, 2025 | |
| Freebsd | freebsd-upgrade-package-firefoxfreebsd-upgrade-package-firefox-esrfreebsd-upgrade-package-thunderbird | Dec 10, 2025 | Nov 2, 2025 | |
| Mfsa2025 73 | mozilla-firefox-upgrade-143_0 | Sep 17, 2025 | Sep 16, 2025 | |
| Mfsa2025 75 | mozilla-firefox-esr-upgrade-140_3 | Sep 17, 2025 | Sep 16, 2025 | |
| Mozilla Thunderbird | mozilla-thunderbird-upgrade-140_3 | Sep 17, 2025 | Sep 16, 2025 | |
| Oracle_linux | — | oracle-linux-upgrade-firefoxoracle-linux-upgrade-firefox-x11oracle-linux-upgrade-thunderbird | Sep 22, 2025 | Sep 16, 2025 |
| Redhat_linux | redhat-upgrade-firefoxredhat-upgrade-firefox-debuginforedhat-upgrade-firefox-debugsourceredhat-upgrade-firefox-x11redhat-upgrade-thunderbirdredhat-upgrade-thunderbird-debuginforedhat-upgrade-thunderbird-debugsource | Sep 19, 2025 | Sep 16, 2025 | |
| Rocky_linux | rocky-upgrade-firefoxrocky-upgrade-firefox-debuginforocky-upgrade-firefox-debugsourcerocky-upgrade-firefox-x11rocky-upgrade-thunderbirdrocky-upgrade-thunderbird-debuginforocky-upgrade-thunderbird-debugsource | Feb 5, 2026 | Oct 3, 2025 | |
| Suse | — | suse-upgrade-mozillafirefoxsuse-upgrade-mozillafirefox-branding-upstreamsuse-upgrade-mozillafirefox-develsuse-upgrade-mozillafirefox-translations-commonsuse-upgrade-mozillafirefox-translations-othersuse-upgrade-mozillathunderbirdsuse-upgrade-mozillathunderbird-openpgp-librnpsuse-upgrade-mozillathunderbird-translations-commonsuse-upgrade-mozillathunderbird-translations-other | Dec 5, 2025 | Sep 20, 2025 |
| Ubuntu | ubuntu-upgrade-thunderbird | Feb 4, 2026 | Feb 2, 2026 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub