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 | — | Upgrade firefoxUpgrade thunderbirdUpgrade firefox-x11 | Sep 29, 2025 | Sep 22, 2025 |
| Amazon Linux Ami 2 | — | Upgrade firefoxUpgrade thunderbird | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade firefox-debugsourceUpgrade firefox-debuginfoUpgrade firefox | Sep 30, 2025 | Sep 16, 2025 |
| Debian | — | Upgrade thunderbirdUpgrade firefox-esr | Sep 22, 2025 | Sep 22, 2025 |
| Freebsd | — | Upgrade firefox-esrUpgrade thunderbirdUpgrade firefox | Dec 10, 2025 | Nov 2, 2025 |
| Mfsa2025 73 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox version 143.0 | Sep 17, 2025 | Sep 16, 2025 |
| Mfsa2025 75 | — | Upgrade to Mozilla Firefox ESR version 140.3Upgrade to the latest version of Mozilla Firefox | Sep 17, 2025 | Sep 16, 2025 |
| Mozilla Thunderbird | — | Upgrade to the latest version of Mozilla ThunderbirdUpgrade to Mozilla Thunderbird version 140.3 | Sep 17, 2025 | Sep 16, 2025 |
| Oracle_linux | — | Upgrade firefoxUpgrade thunderbirdUpgrade firefox-x11 | Sep 22, 2025 | Sep 16, 2025 |
| Redhat_linux | — | Upgrade firefox-debuginfoUpgrade thunderbirdUpgrade thunderbird-debuginfoUpgrade thunderbird-debugsourceUpgrade firefoxNo solution existsUpgrade firefox-debugsourceUpgrade firefox-x11 | Sep 19, 2025 | Sep 16, 2025 |
| Rocky_linux | — | Upgrade firefox-x11Upgrade firefox-debuginfoUpgrade thunderbird-debuginfoUpgrade thunderbird-debugsourceUpgrade firefox-debugsourceUpgrade thunderbirdUpgrade firefox | Feb 5, 2026 | Oct 3, 2025 |
| Suse | — | Upgrade MozillaFirefox-develUpgrade MozillaFirefox-translations-otherUpgrade MozillaFirefox-translations-commonUpgrade MozillaFirefoxUpgrade MozillaThunderbirdUpgrade mozillafirefox-branding-upstreamUpgrade MozillaThunderbird-translations-otherUpgrade MozillaThunderbird-openpgp-librnpUpgrade MozillaThunderbird-translations-common | Dec 5, 2025 | Sep 20, 2025 |
| Ubuntu | — | Upgrade thunderbird | Feb 4, 2026 | Feb 2, 2026 |
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