Memory safety bugs present in 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 140.2, Thunderbird 142, 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 |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade firefox-debugsourceUpgrade firefox-debuginfoUpgrade firefox | Sep 9, 2025 | Aug 19, 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 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 |
| Suse | — | Upgrade MozillaThunderbirdUpgrade MozillaFirefox-translations-commonUpgrade MozillaFirefox-develUpgrade MozillaThunderbird-translations-otherUpgrade MozillaFirefoxUpgrade MozillaFirefox-translations-otherUpgrade mozillafirefox-branding-upstreamUpgrade MozillaThunderbird-translations-common | Dec 5, 2025 | Aug 28, 2025 |
| Ubuntu | — | Upgrade thunderbird | Feb 4, 2026 | Feb 2, 2026 |
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