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Uninitialized memory in a canvas object could have caused an incorrect free() leading to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 78.13, Thunderbird < 91, Firefox ESR < 78.13, and Firefox < 91.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade firefoxUpgrade thunderbird | May 4, 2022 | Aug 17, 2021 |
| Alpine Linux | — | Upgrade firefox-esrUpgrade librewolfUpgrade firefoxUpgrade thunderbird | Aug 22, 2024 | Aug 17, 2021 |
| Amazon Linux Ami 2 | — | Upgrade thunderbirdUpgrade thunderbird-debuginfo | Sep 16, 2021 | Aug 17, 2021 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Aug 17, 2021 |
| Centos_linux | — | Upgrade thunderbird-debugsourceUpgrade thunderbird-debuginfoUpgrade firefox-debugsourceUpgrade firefox-debuginfoUpgrade thunderbirdUpgrade firefox | Aug 17, 2021 | Aug 16, 2021 |
| Debian | — | Upgrade firefox-esrUpgrade thunderbird | Aug 13, 2021 | Aug 13, 2021 |
| Gentoo Linux | — | Upgrade mail-client/thunderbird-bin.Upgrade www-client/firefox-bin.Upgrade www-client/firefox.Upgrade mail-client/thunderbird. | Feb 22, 2022 | Aug 17, 2021 |
| Mfsa2021 33 | — | Upgrade to Mozilla Firefox version 91.0Upgrade to the latest version of Mozilla Firefox | Aug 12, 2021 | Aug 10, 2021 |
| Mfsa2021 34 | — | Upgrade to Mozilla Firefox ESR version 78.13Upgrade to the latest version of Mozilla Firefox | Aug 12, 2021 | Aug 10, 2021 |
| Mozilla Thunderbird | — | Upgrade to the latest version of Mozilla ThunderbirdUpgrade to Mozilla Thunderbird version 91.0 | Sep 16, 2021 | Aug 17, 2021 |
| Oracle Solaris | — | Upgrade web/data/firefox-bookmarks to version 78.14.0-11.4.38.0.1.101.3 on Solaris 11.4Upgrade mail/thunderbird to version 78.14.0-11.4.38.0.1.101.3 on Solaris 11.4Upgrade web/browser/firefox to version 78.14.0-11.4.38.0.1.101.3 on Solaris 11.4 | Nov 17, 2021 | Aug 17, 2021 |
| Oracle_linux | — | Upgrade firefoxUpgrade thunderbird | Aug 17, 2021 | Aug 10, 2021 |
| Redhat_linux | — | Upgrade thunderbirdUpgrade firefoxUpgrade thunderbird-debugsourceUpgrade thunderbird-debuginfoUpgrade firefox-debuginfoNo solution existsUpgrade firefox-debugsource | Aug 17, 2021 | Aug 16, 2021 |
| Rocky_linux | — | Upgrade thunderbirdUpgrade firefoxUpgrade firefox-debugsourceUpgrade thunderbird-debugsourceUpgrade thunderbird-debuginfoUpgrade firefox-debuginfo | May 5, 2022 | Aug 17, 2021 |
| Suse | — | Upgrade rust-cbindgenUpgrade mozillafirefox-branding-sleUpgrade MozillaFirefox-branding-SLEDUpgrade mozillafirefox-buildsymbolsUpgrade MozillaFirefox-translations-otherUpgrade MozillaFirefox-translations-commonUpgrade MozillaFirefox-develUpgrade MozillaThunderbird-translations-otherUpgrade mozillafirefox-branding-upstreamUpgrade MozillaThunderbird-translations-commonUpgrade MozillaFirefoxUpgrade MozillaThunderbird | Aug 13, 2021 | Aug 11, 2021 |
| Ubuntu | — | Upgrade thunderbirdUpgrade firefox | Aug 12, 2021 | Aug 11, 2021 |
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