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 thunderbirdUpgrade firefox-x11Upgrade firefox | Oct 21, 2025 | Oct 20, 2025 |
| Amazon Linux Ami 2 | — | Upgrade thunderbirdUpgrade firefox | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade firefox-debuginfoUpgrade firefoxUpgrade firefox-debugsource | Oct 28, 2025 | Oct 14, 2025 |
| Debian | — | Upgrade firefox-esrUpgrade thunderbird | Oct 21, 2025 | Oct 21, 2025 |
| Freebsd | — | Upgrade thunderbirdUpgrade firefoxUpgrade 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 | — | Upgrade thunderbird-debugsourceUpgrade firefox-debugsourceUpgrade thunderbirdUpgrade firefox-debuginfoNo solution existsUpgrade firefox-x11Upgrade thunderbird-debuginfoUpgrade firefox | Oct 16, 2025 | Oct 14, 2025 |
| Rocky_linux | — | Upgrade thunderbird-debugsourceUpgrade thunderbird-debuginfoUpgrade firefox-debuginfoUpgrade thunderbirdUpgrade firefoxUpgrade firefox-debugsourceUpgrade firefox-x11 | Feb 5, 2026 | Oct 23, 2025 |
| Suse | — | Upgrade MozillaThunderbird-openpgp-librnpUpgrade mozillafirefox-develUpgrade mozillathunderbird-translations-commonUpgrade mozillafirefox-translations-otherUpgrade mozillafirefox-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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