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.
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade firefoxUpgrade firefox-x11Upgrade thunderbird | Jul 31, 2025 | Jul 24, 2025 |
| Amazon Linux Ami 2 | — | Upgrade firefoxUpgrade thunderbirdUpgrade firefox-debuginfoUpgrade thunderbird-debuginfo | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade firefox-debugsourceUpgrade firefoxUpgrade firefox-debuginfo | Aug 19, 2025 | Jul 22, 2025 |
| Debian | — | Upgrade thunderbirdUpgrade firefox-esr | Jul 24, 2025 | Jul 22, 2025 |
| Freebsd | — | Upgrade firefox-esrUpgrade thunderbird-esrUpgrade firefoxUpgrade thunderbird | Jul 25, 2025 | Jul 24, 2025 |
| Mfsa2025 56 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox version 141.0 | Jul 23, 2025 | Jul 22, 2025 |
| Mfsa2025 57 | — | Upgrade to Mozilla Firefox ESR version 115.26Upgrade to the latest version of Mozilla Firefox | 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 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 |
| Oracle_linux | — | Upgrade firefoxUpgrade firefox-x11Upgrade thunderbird | Jul 28, 2025 | Jul 22, 2025 |
| Redhat_linux | — | Upgrade firefox-debugsourceUpgrade firefox-debuginfoUpgrade thunderbirdUpgrade thunderbird-debuginfoUpgrade thunderbird-debugsourceNo solution existsUpgrade firefoxUpgrade firefox-x11 | Jul 25, 2025 | Jul 22, 2025 |
| Rocky_linux | — | Upgrade thunderbird-debugsourceUpgrade thunderbirdUpgrade firefoxUpgrade firefox-debuginfoUpgrade thunderbird-debuginfoUpgrade firefox-x11Upgrade firefox-debugsource | Feb 5, 2026 | Sep 8, 2025 |
| Suse | — | Upgrade mozillafirefox-branding-sleUpgrade pipewire-modules-0_3Upgrade MozillaFirefox-translations-commonUpgrade mozillafirefox-branding-upstreamUpgrade MozillaThunderbird-translations-commonUpgrade libpipewire-0_3-0Upgrade xdg-desktop-portal-langUpgrade pipewire-langUpgrade MozillaFirefoxUpgrade pipewire-toolsUpgrade pipewire-spa-plugins-0_2Upgrade xdg-desktop-portal-develUpgrade pipewire-spa-toolsUpgrade pipewireUpgrade MozillaThunderbird-translations-otherUpgrade gstreamer-plugin-pipewireUpgrade xdg-desktop-portalUpgrade MozillaThunderbirdUpgrade MozillaFirefox-develUpgrade MozillaFirefox-translations-otherUpgrade pipewire-modules | Dec 5, 2025 | Jul 26, 2025 |
| Ubuntu | — | Upgrade thunderbird | Jul 24, 2025 | Jul 22, 2025 |
Prioritise with Active Threat Intelligence
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub