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Mozilla developers and community members reported memory safety bugs present in Firefox 86 and Firefox ESR 78.8. 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 ESR < 78.9, Firefox < 87, and Thunderbird < 78.9.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade thunderbirdUpgrade firefox | May 4, 2022 | Mar 31, 2021 |
| Alpine Linux | — | Upgrade thunderbirdUpgrade firefoxUpgrade librewolfUpgrade mozjs78Upgrade firefox-esr | Jun 17, 2022 | Mar 31, 2021 |
| Amazon Linux Ami 2 | — | Upgrade thunderbird-debuginfoUpgrade thunderbird | Apr 23, 2021 | Mar 31, 2021 |
| Centos_linux | — | Upgrade thunderbirdUpgrade firefoxUpgrade thunderbird-debuginfoUpgrade firefox-debugsourceUpgrade thunderbird-debugsourceUpgrade firefox-debuginfo | Mar 26, 2021 | Mar 25, 2021 |
| Debian | — | Upgrade firefox-esrUpgrade thunderbird | Mar 26, 2021 | Mar 26, 2021 |
| Gentoo Linux | — | Upgrade www-client/firefox-bin.Upgrade mail-client/thunderbird.Upgrade mail-client/thunderbird-bin.Upgrade www-client/firefox. | May 3, 2021 | Mar 31, 2021 |
| Mfsa2021 10 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox version 87.0 | Mar 24, 2021 | Mar 23, 2021 |
| Mfsa2021 11 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 78.9 | Mar 24, 2021 | Mar 23, 2021 |
| Mozilla Thunderbird | — | Upgrade to the latest version of Mozilla ThunderbirdUpgrade to Mozilla Thunderbird version 78.9 | Mar 24, 2021 | Mar 23, 2021 |
| Oracle Solaris | — | Upgrade web/data/firefox-bookmarks to version 78.9.0-11.4.32.0.1.88.3 on Solaris 11.4Upgrade mail/thunderbird to version 78.9.0-11.4.32.0.1.88.3 on Solaris 11.4Upgrade web/browser/firefox to version 78.9.0-11.4.32.0.1.88.3 on Solaris 11.4 | Apr 21, 2021 | Mar 31, 2021 |
| Oracle_linux | — | Upgrade thunderbirdUpgrade firefox | Mar 26, 2021 | Mar 23, 2021 |
| Redhat_linux | — | Upgrade firefox-debugsourceUpgrade firefoxUpgrade thunderbird-debuginfoUpgrade firefox-debuginfoNo solution existsUpgrade thunderbirdUpgrade thunderbird-debugsource | Mar 26, 2021 | Mar 25, 2021 |
| Suse | — | Upgrade MozillaFirefox-translations-commonUpgrade MozillaFirefox-translations-otherUpgrade MozillaThunderbird-translations-commonUpgrade mozillafirefox-buildsymbolsUpgrade mozilla-nspr-develUpgrade mozillafirefox-branding-upstreamUpgrade MozillaThunderbird-translations-otherUpgrade MozillaFirefox-develUpgrade MozillaThunderbirdUpgrade mozillafirefox-branding-sleUpgrade MozillaFirefoxUpgrade mozilla-nspr-32bitUpgrade mozilla-nspr | Mar 31, 2021 | Mar 25, 2021 |
| Ubuntu | — | Upgrade thunderbirdUpgrade firefox | Mar 26, 2021 | Mar 25, 2021 |
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