Instruction reordering resulted in a sequence of instructions that would cause an object to be incorrectly considered during garbage collection. This led 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 thunderbirdUpgrade firefox | May 4, 2022 | Aug 17, 2021 |
| Alpine Linux | — | Upgrade firefox-esrUpgrade thunderbirdUpgrade firefoxUpgrade mozjs78Upgrade librewolf | Aug 22, 2024 | Aug 17, 2021 |
| Amazon Linux Ami 2 | — | Upgrade thunderbird-debuginfoUpgrade thunderbird | 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 firefoxUpgrade thunderbirdUpgrade firefox-debuginfoUpgrade firefox-debugsourceUpgrade thunderbird-debugsourceUpgrade thunderbird-debuginfo | Aug 17, 2021 | Aug 16, 2021 |
| Debian | — | Upgrade thunderbirdUpgrade firefox-esr | Aug 13, 2021 | Aug 13, 2021 |
| Gentoo Linux | — | Upgrade www-client/firefox-bin.Upgrade www-client/firefox.Upgrade mail-client/thunderbird.Upgrade mail-client/thunderbird-bin. | 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 the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 78.13 | Aug 12, 2021 | Aug 10, 2021 |
| Mozilla Thunderbird | — | Upgrade to Mozilla Thunderbird version 91.0Upgrade to the latest version of Mozilla Thunderbird | 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 web/browser/firefox 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 11.4 | Nov 17, 2021 | Aug 17, 2021 |
| Oracle_linux | — | Upgrade thunderbirdUpgrade firefox | Aug 17, 2021 | Aug 10, 2021 |
| Redhat_linux | — | No solution existsUpgrade firefoxUpgrade firefox-debugsourceUpgrade thunderbirdUpgrade thunderbird-debuginfoUpgrade firefox-debuginfoUpgrade thunderbird-debugsource | Aug 17, 2021 | Aug 16, 2021 |
| Rocky_linux | — | Upgrade firefoxUpgrade thunderbirdUpgrade thunderbird-debugsourceUpgrade thunderbird-debuginfoUpgrade firefox-debuginfoUpgrade firefox-debugsource | May 5, 2022 | Aug 17, 2021 |
| Suse | — | Upgrade libmozjs-78-0Upgrade mozillafirefox-buildsymbolsUpgrade mozillafirefox-branding-sleUpgrade MozillaThunderbird-translations-commonUpgrade MozillaFirefoxUpgrade rust-cbindgenUpgrade mozjs78-develUpgrade MozillaFirefox-translations-otherUpgrade MozillaFirefox-translations-commonUpgrade mozillafirefox-branding-upstreamUpgrade MozillaThunderbirdUpgrade MozillaFirefox-develUpgrade MozillaThunderbird-translations-otherUpgrade MozillaFirefox-branding-SLED | Aug 13, 2021 | Aug 11, 2021 |
| Ubuntu | — | Upgrade thunderbirdUpgrade firefox | Aug 12, 2021 | Aug 11, 2021 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | Aug 17, 2021 |
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