Memory safety bugs present in Firefox ESR 140.0, Thunderbird ESR 140.0, Firefox 140 and Thunderbird 140. 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 141, Firefox ESR 140.1, Thunderbird 141, and Thunderbird 140.1.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Freebsd | — | Upgrade thunderbirdUpgrade firefoxUpgrade firefox-esrUpgrade thunderbird-esr | Jul 25, 2025 | Jul 24, 2025 |
| Mfsa2025 56 | — | Upgrade to Mozilla Firefox version 141.0Upgrade to the latest version of Mozilla Firefox | Jul 23, 2025 | Jul 22, 2025 |
| Mfsa2025 59 | — | Upgrade to Mozilla Firefox ESR version 140.1Upgrade to the latest version of Mozilla Firefox | Jul 23, 2025 | Jul 22, 2025 |
| Mozilla Thunderbird | — | Upgrade to the latest version of Mozilla ThunderbirdUpgrade to Mozilla Thunderbird version 140.1 | Jul 23, 2025 | Jul 22, 2025 |
| Suse | — | Upgrade MozillaFirefoxUpgrade libpipewire-0_3-0Upgrade pipewire-modules-0_3Upgrade mozillafirefox-branding-sleUpgrade MozillaThunderbird-translations-commonUpgrade pipewire-modulesUpgrade mozillafirefox-branding-upstreamUpgrade pipewire-toolsUpgrade pipewireUpgrade pipewire-spa-toolsUpgrade gstreamer-plugin-pipewireUpgrade pipewire-spa-plugins-0_2Upgrade MozillaFirefox-develUpgrade xdg-desktop-portal-develUpgrade MozillaFirefox-translations-commonUpgrade MozillaThunderbird-translations-otherUpgrade MozillaFirefox-translations-otherUpgrade xdg-desktop-portalUpgrade pipewire-langUpgrade xdg-desktop-portal-langUpgrade MozillaThunderbird | Dec 5, 2025 | Jul 25, 2025 |
| Ubuntu | — | Upgrade thunderbird | Jul 24, 2025 | Jul 22, 2025 |
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