Memory safety bugs present in Firefox ESR 115.28, Firefox ESR 140.3, Thunderbird ESR 140.3, Firefox 143 and Thunderbird 143. 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 144, Firefox ESR 115.29, Firefox ESR 140.4, Thunderbird 144, and Thunderbird 140.4.
CVSS Details
- CVSS 3.1 Base Score: 8.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade firefox-x11Upgrade firefoxUpgrade thunderbird | Oct 21, 2025 | Oct 20, 2025 |
| Amazon Linux Ami 2 | — | Upgrade firefoxUpgrade thunderbird | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade firefoxUpgrade firefox-debugsourceUpgrade firefox-debuginfo | Oct 28, 2025 | Oct 14, 2025 |
| Debian | — | Upgrade firefox-esrUpgrade thunderbird | Oct 21, 2025 | Oct 21, 2025 |
| Freebsd | — | Upgrade firefoxUpgrade firefox-esrUpgrade thunderbird | Dec 10, 2025 | Oct 19, 2025 |
| Mfsa2025 81 | — | Upgrade to Mozilla Firefox version 144.0Upgrade to the latest version of Mozilla Firefox | Oct 15, 2025 | Oct 14, 2025 |
| Mfsa2025 82 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 115.29 | Oct 15, 2025 | Oct 14, 2025 |
| Mfsa2025 83 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 140.4 | Oct 15, 2025 | Oct 14, 2025 |
| Mozilla Thunderbird | — | Upgrade to Mozilla Thunderbird version 140.4Upgrade to the latest version of Mozilla Thunderbird | Oct 15, 2025 | Oct 14, 2025 |
| Oracle_linux | — | Upgrade firefox-x11Upgrade thunderbirdUpgrade firefox | Oct 17, 2025 | Oct 14, 2025 |
| Redhat_linux | — | Upgrade firefox-debugsourceUpgrade thunderbird-debugsourceUpgrade thunderbirdUpgrade firefox-x11Upgrade thunderbird-debuginfoNo solution existsUpgrade firefoxUpgrade firefox-debuginfo | Oct 16, 2025 | Oct 14, 2025 |
| Rocky_linux | — | Upgrade firefox-x11Upgrade firefox-debugsourceUpgrade thunderbird-debuginfoUpgrade thunderbirdUpgrade firefox-debuginfoUpgrade thunderbird-debugsourceUpgrade firefox | Feb 5, 2026 | Oct 23, 2025 |
| Suse | — | Upgrade MozillaFirefox-translations-otherUpgrade MozillaFirefoxUpgrade MozillaThunderbird-translations-otherUpgrade MozillaThunderbirdUpgrade MozillaThunderbird-openpgp-librnpUpgrade MozillaFirefox-develUpgrade MozillaFirefox-translations-commonUpgrade MozillaThunderbird-translations-commonUpgrade mozillafirefox-branding-upstream | Dec 5, 2025 | Oct 17, 2025 |
| Ubuntu | — | Upgrade thunderbird | Feb 4, 2026 | Feb 2, 2026 |
Prioritize 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