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 firefoxUpgrade thunderbirdUpgrade firefox-x11 | Oct 21, 2025 | Oct 20, 2025 |
| Amazon Linux Ami 2 | — | Upgrade firefoxUpgrade thunderbird | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade firefox-debugsourceUpgrade firefoxUpgrade firefox-debuginfo | Oct 28, 2025 | Oct 14, 2025 |
| Debian | — | Upgrade thunderbirdUpgrade firefox-esr | Oct 21, 2025 | Oct 21, 2025 |
| Freebsd | — | Upgrade firefoxUpgrade thunderbirdUpgrade firefox-esr | Dec 10, 2025 | Oct 19, 2025 |
| Mfsa2025 81 | — | Upgrade to Mozilla Firefox version 144.0 | Oct 15, 2025 | Oct 14, 2025 |
| Mfsa2025 82 | — | Upgrade to Mozilla Firefox ESR version 115.29 | Oct 15, 2025 | Oct 14, 2025 |
| Mfsa2025 83 | — | Upgrade to Mozilla Firefox ESR version 140.4 | Oct 15, 2025 | Oct 14, 2025 |
| Mozilla Thunderbird | — | Upgrade to Mozilla Thunderbird version 140.4 | Oct 15, 2025 | Oct 14, 2025 |
| Oracle_linux | — | Upgrade thunderbirdUpgrade firefoxUpgrade firefox-x11 | Oct 17, 2025 | Oct 14, 2025 |
| Redhat_linux | — | No solution existsUpgrade thunderbirdUpgrade thunderbird-debuginfoUpgrade firefox-x11Upgrade firefox-debuginfoUpgrade firefoxUpgrade firefox-debugsourceUpgrade thunderbird-debugsource | Oct 16, 2025 | Oct 14, 2025 |
| Rocky_linux | — | Upgrade firefox-x11Upgrade firefox-debugsourceUpgrade thunderbird-debugsourceUpgrade firefoxUpgrade thunderbirdUpgrade thunderbird-debuginfoUpgrade firefox-debuginfo | Feb 5, 2026 | Oct 23, 2025 |
| Suse | — | Upgrade MozillaThunderbird-openpgp-librnpUpgrade mozillafirefox-translations-commonUpgrade mozillafirefox-develUpgrade mozillafirefox-translations-otherUpgrade mozillathunderbird-translations-commonUpgrade mozillathunderbirdUpgrade mozillafirefoxUpgrade mozillathunderbird-translations-otherUpgrade mozillafirefox-branding-upstream | Dec 5, 2025 | Oct 17, 2025 |
| Ubuntu | — | Upgrade thunderbird | Feb 4, 2026 | Feb 2, 2026 |
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