Memory safety bugs present in Firefox ESR 115.26, Firefox ESR 128.13, Thunderbird ESR 128.13, Firefox ESR 140.1, Thunderbird ESR 140.1, Firefox 141 and Thunderbird 141. 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 142, Firefox ESR 115.27, Firefox ESR 128.14, Firefox ESR 140.2, Thunderbird 142, Thunderbird 128.14, and Thunderbird 140.2.
CVSS Details
- CVSS 3.1 Base Score: 8.1
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/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 | Aug 28, 2025 | Aug 25, 2025 |
| Amazon Linux Ami 2 | — | Upgrade firefoxUpgrade thunderbird | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade firefox-debuginfoUpgrade firefoxUpgrade firefox-debugsource | Sep 9, 2025 | Aug 19, 2025 |
| Debian | — | Upgrade thunderbirdUpgrade firefox-esr | Aug 22, 2025 | Aug 22, 2025 |
| Freebsd | — | Upgrade firefoxUpgrade thunderbirdUpgrade firefox-esr | Dec 10, 2025 | Aug 21, 2025 |
| Mfsa2025 64 | — | Upgrade to Mozilla Firefox version 142.0Upgrade to the latest version of Mozilla Firefox | Aug 21, 2025 | Aug 19, 2025 |
| Mfsa2025 65 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 115.27 | Aug 21, 2025 | Aug 19, 2025 |
| Mfsa2025 66 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 128.14 | Aug 21, 2025 | Aug 19, 2025 |
| Mfsa2025 67 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 140.2 | Aug 21, 2025 | Aug 19, 2025 |
| Mozilla Thunderbird | — | Upgrade to Mozilla Thunderbird version 140.2Upgrade to the latest version of Mozilla Thunderbird | Aug 22, 2025 | Aug 19, 2025 |
| Oracle_linux | — | Upgrade firefox-x11Upgrade firefoxUpgrade thunderbird | Aug 26, 2025 | Aug 19, 2025 |
| Redhat_linux | — | Upgrade thunderbird-debugsourceUpgrade firefox-debuginfoUpgrade firefox-debugsourceUpgrade firefoxNo solution existsUpgrade firefox-x11Upgrade thunderbird-debuginfoUpgrade thunderbird | Aug 26, 2025 | Aug 19, 2025 |
| Rocky_linux | — | Upgrade firefoxUpgrade thunderbird-debuginfoUpgrade firefox-debuginfoUpgrade firefox-x11Upgrade thunderbird-debugsourceUpgrade thunderbirdUpgrade firefox-debugsource | Feb 5, 2026 | Sep 8, 2025 |
| Suse | — | Upgrade MozillaFirefox-translations-otherUpgrade MozillaFirefox-develUpgrade MozillaThunderbirdUpgrade MozillaThunderbird-translations-commonUpgrade MozillaThunderbird-translations-otherUpgrade MozillaFirefoxUpgrade MozillaFirefox-translations-commonUpgrade mozillafirefox-branding-upstream | Dec 5, 2025 | Aug 29, 2025 |
| Ubuntu | — | Upgrade thunderbird | Feb 4, 2026 | Feb 2, 2026 |
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