Mozilla developers reported memory safety bugs present in Firefox 80 and Firefox ESR 78.2. 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 affects Firefox < 81, Thunderbird < 78.3, and Firefox ESR < 78.3.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade firefoxUpgrade thunderbirdUpgrade librewolfUpgrade firefox-esr | Aug 22, 2024 | Oct 1, 2020 |
| Amazon Linux Ami 2 | — | Upgrade thunderbirdUpgrade thunderbird-debuginfo | Dec 10, 2020 | Oct 1, 2020 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Oct 1, 2020 |
| Centos_linux | — | Upgrade firefoxUpgrade firefox-debuginfoUpgrade thunderbird-debuginfoUpgrade thunderbirdUpgrade firefox-debugsourceUpgrade thunderbird-debugsource | Sep 25, 2020 | Sep 24, 2020 |
| Debian | — | Upgrade thunderbirdUpgrade firefox-esr | Sep 30, 2020 | Sep 30, 2020 |
| Gentoo Linux | — | Upgrade mail-client/thunderbird.Upgrade www-client/firefox-bin.Upgrade mail-client/thunderbird-bin.Upgrade www-client/firefox. | Oct 19, 2020 | Oct 1, 2020 |
| Mfsa2020 42 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox version 81.0 | Sep 23, 2020 | Sep 22, 2020 |
| Mfsa2020 43 | — | Upgrade to Mozilla Firefox ESR version 78.3Upgrade to the latest version of Mozilla Firefox | Sep 23, 2020 | Sep 22, 2020 |
| Mozilla Thunderbird | — | Upgrade to Mozilla Thunderbird version 78.3Upgrade to the latest version of Mozilla Thunderbird | Sep 25, 2020 | Sep 22, 2020 |
| Oracle Solaris | — | Upgrade web/data/firefox-bookmarks to version 78.3.0-11.4.27.0.1.82.0 on Solaris 11.4Upgrade mail/thunderbird to version 78.3.0-11.4.27.0.1.82.0 on Solaris 11.4Upgrade web/browser/firefox to version 78.3.0-11.4.27.0.1.82.0 on Solaris 11.4 | Jan 19, 2021 | Oct 1, 2020 |
| Oracle_linux | — | Upgrade thunderbirdUpgrade firefox | Sep 25, 2020 | Sep 22, 2020 |
| Redhat_linux | — | Upgrade thunderbird-debuginfoUpgrade firefox-debuginfoNo solution existsUpgrade firefox-debugsourceUpgrade thunderbirdUpgrade firefoxUpgrade thunderbird-debugsource | Sep 25, 2020 | Sep 24, 2020 |
| Suse | — | Upgrade MozillaFirefox-develUpgrade mozillafirefox-branding-upstreamUpgrade MozillaFirefox-translations-otherUpgrade MozillaThunderbird-translations-otherUpgrade mozillafirefox-buildsymbolsUpgrade MozillaThunderbird-translations-commonUpgrade mozilla-nsprUpgrade MozillaFirefox-translations-commonUpgrade mozilla-nspr-develUpgrade mozilla-nspr-32bitUpgrade MozillaFirefoxUpgrade MozillaThunderbird | Sep 29, 2020 | Sep 24, 2020 |
| Ubuntu | — | Upgrade firefox | Sep 29, 2020 | Sep 24, 2020 |
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