The JavaScript engine did not handle closed generators correctly and it was possible to resume them leading to a nullptr deref. This vulnerability was fixed in Firefox 141, Firefox ESR 115.26, Firefox ESR 128.13, Firefox ESR 140.1, Thunderbird 141, Thunderbird 128.13, and Thunderbird 140.1.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade firefox-x11Upgrade thunderbirdUpgrade firefox | Jul 31, 2025 | Jul 24, 2025 |
| Amazon Linux Ami 2 | — | Upgrade thunderbird-debuginfoUpgrade firefoxUpgrade thunderbirdUpgrade firefox-debuginfo | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade firefox-debugsourceUpgrade firefoxUpgrade firefox-debuginfo | Aug 19, 2025 | Jul 22, 2025 |
| Debian | — | Upgrade firefox-esrUpgrade thunderbird | Jul 24, 2025 | Jul 22, 2025 |
| Freebsd | — | Upgrade firefoxUpgrade thunderbirdUpgrade 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 57 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 115.26 | Jul 23, 2025 | Jul 22, 2025 |
| Mfsa2025 58 | — | Upgrade to Mozilla Firefox ESR version 128.13Upgrade to the latest version of Mozilla Firefox | Jul 23, 2025 | Jul 22, 2025 |
| Mfsa2025 59 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 140.1 | Jul 23, 2025 | Jul 22, 2025 |
| Mozilla Thunderbird | — | Upgrade to Mozilla Thunderbird version 140.1Upgrade to the latest version of Mozilla Thunderbird | Jul 23, 2025 | Jul 22, 2025 |
| Oracle_linux | — | Upgrade firefoxUpgrade firefox-x11Upgrade thunderbird | Jul 28, 2025 | Jul 22, 2025 |
| Redhat_linux | — | Upgrade thunderbirdUpgrade thunderbird-debuginfoUpgrade firefox-x11Upgrade firefox-debuginfoNo solution existsUpgrade firefoxUpgrade thunderbird-debugsourceUpgrade firefox-debugsource | Jul 25, 2025 | Jul 22, 2025 |
| Rocky_linux | — | Upgrade firefox-debugsourceUpgrade firefox-x11Upgrade firefoxUpgrade thunderbirdUpgrade firefox-debuginfoUpgrade thunderbird-debugsourceUpgrade thunderbird-debuginfo | Feb 5, 2026 | Sep 8, 2025 |
| Suse | — | Upgrade pipewire-langUpgrade xdg-desktop-portal-langUpgrade pipewire-modulesUpgrade MozillaFirefox-translations-otherUpgrade MozillaFirefox-develUpgrade MozillaThunderbirdUpgrade xdg-desktop-portalUpgrade pipewireUpgrade pipewire-spa-toolsUpgrade gstreamer-plugin-pipewireUpgrade pipewire-spa-plugins-0_2Upgrade MozillaThunderbird-translations-otherUpgrade MozillaFirefoxUpgrade xdg-desktop-portal-develUpgrade pipewire-toolsUpgrade MozillaFirefox-translations-commonUpgrade libpipewire-0_3-0Upgrade mozillafirefox-branding-upstreamUpgrade pipewire-modules-0_3Upgrade MozillaThunderbird-translations-commonUpgrade mozillafirefox-branding-sle | Dec 5, 2025 | Jul 26, 2025 |
| Ubuntu | — | Upgrade thunderbird | Jul 24, 2025 | Jul 22, 2025 |
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