When using nested workers, a use-after-free could occur during worker destruction. This resulted in a potentially exploitable crash. This vulnerability affects Thunderbird < 68.3, Firefox ESR < 68.3, and Firefox < 71.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade firefox-esrUpgrade firefox | Aug 22, 2024 | Jan 8, 2020 |
| Amazon Linux Ami 2 | — | Upgrade thunderbird-debuginfoUpgrade thunderbird | Apr 27, 2020 | Jan 8, 2020 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Jan 8, 2020 |
| Centos_linux | — | Upgrade thunderbirdUpgrade firefox-debuginfoUpgrade thunderbird-debuginfoUpgrade thunderbird-debugsourceUpgrade firefox-debugsourceUpgrade firefox | Dec 6, 2019 | Dec 5, 2019 |
| Debian | — | Upgrade firefox-esrUpgrade thunderbird | Dec 12, 2019 | Dec 12, 2019 |
| Gentoo Linux | — | Upgrade mail-client/thunderbird.Upgrade mail-client/thunderbird-bin.Upgrade www-client/firefox.Upgrade www-client/firefox-bin. | Mar 13, 2020 | Jan 8, 2020 |
| Mfsa2019 36 | — | Upgrade to Mozilla Firefox version 71.0Upgrade to the latest version of Mozilla Firefox | Dec 4, 2019 | Dec 3, 2019 |
| Mfsa2019 37 | — | Upgrade to Mozilla Firefox ESR version 68.3Upgrade to the latest version of Mozilla Firefox | Dec 4, 2019 | Dec 3, 2019 |
| Mozilla Thunderbird | — | Upgrade to the latest version of Mozilla ThunderbirdUpgrade to Mozilla Thunderbird version 68.3 | Dec 5, 2019 | Dec 3, 2019 |
| Oracle Solaris | — | Upgrade web/browser/firefox to version 68.3.0-11.4.17.0.1.2.0 on Solaris 11.4Upgrade mail/thunderbird/plugin/thunderbird-lightning to version 68.3.0-11.4.17.0.1.2.0 on Solaris 11.4Upgrade web/data/firefox-bookmarks to version 68.3.0-11.4.17.0.1.2.0 on Solaris 11.4Upgrade mail/thunderbird to version 68.3.0-11.4.17.0.1.2.0 on Solaris 11.4 | Jan 19, 2021 | Jan 8, 2020 |
| Oracle_linux | — | Upgrade thunderbirdUpgrade firefox | Dec 12, 2019 | Dec 3, 2019 |
| Redhat_linux | — | Upgrade thunderbirdUpgrade firefox-debuginfoUpgrade thunderbird-debuginfoUpgrade firefox-debugsourceUpgrade thunderbird-debugsourceUpgrade firefox | Dec 6, 2019 | Dec 5, 2019 |
| Suse | — | Upgrade mozilla-nss-certsUpgrade libfreebl3Upgrade mozilla-nss-32bitUpgrade mozilla-nsprUpgrade mozilla-nss-certs-32bitUpgrade MozillaFirefoxUpgrade libfreebl3-32bitUpgrade mozillafirefox-branding-upstreamUpgrade mozilla-nspr-32bitUpgrade mozillafirefox-buildsymbolsUpgrade libsoftokn3-32bitUpgrade libsoftokn3Upgrade MozillaThunderbirdUpgrade mozilla-nssUpgrade MozillaFirefox-develUpgrade MozillaFirefox-translations-otherUpgrade mozilla-nspr-develUpgrade MozillaThunderbird-translations-commonUpgrade mozilla-nss-toolsUpgrade mozilla-nss-develUpgrade MozillaThunderbird-translations-otherUpgrade MozillaFirefox-translations-common | Dec 21, 2019 | Dec 9, 2019 |
| Ubuntu | — | Upgrade firefoxUpgrade thunderbird | Dec 10, 2019 | Dec 9, 2019 |
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