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A use-after-free vulnerability can occur when working with XMLHttpRequest (XHR) in an event loop, causing the XHR main thread to be called after it has been freed. This results in a potentially exploitable crash. This vulnerability affects Thunderbird < 60.7, Firefox < 67, and Firefox ESR < 60.7.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade firefox-esr | Nov 8, 2019 | Jul 23, 2019 |
| Amazon Linux Ami 2 | — | Upgrade thunderbird-debuginfoUpgrade thunderbird | Apr 27, 2020 | Jul 23, 2019 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Jul 23, 2019 |
| Centos_linux | — | Upgrade thunderbird-debuginfoUpgrade firefox-debugsourceUpgrade firefoxUpgrade firefox-debuginfoUpgrade thunderbird-debugsourceUpgrade thunderbird | May 31, 2019 | May 21, 2019 |
| Debian | — | Upgrade firefox-esrUpgrade thunderbird | May 23, 2019 | May 23, 2019 |
| Freebsd | — | Upgrade firefox-esrUpgrade libxulUpgrade thunderbirdUpgrade seamonkeyUpgrade firefoxUpgrade linux-seamonkeyUpgrade linux-thunderbirdUpgrade waterfoxUpgrade linux-firefox | May 23, 2019 | May 22, 2019 |
| Mfsa2019 13 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox version 67.0 | May 22, 2019 | May 21, 2019 |
| Mfsa2019 14 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 60.7 | May 22, 2019 | May 21, 2019 |
| Mozilla Thunderbird | — | Upgrade to Mozilla Thunderbird version 60.7Upgrade to the latest version of Mozilla Thunderbird | May 23, 2019 | May 21, 2019 |
| Oracle Solaris | — | Upgrade web/browser/firefox to version 60.7.0-11.4.10.0.1.2.0 on Solaris 11.4Upgrade web/data/firefox-bookmarks to version 60.7.0-11.4.10.0.1.2.0 on Solaris 11.4Upgrade mail/thunderbird to version 60.7.0-11.4.10.0.1.2.0 on Solaris 11.4Upgrade mail/thunderbird/plugin/thunderbird-lightning to version 60.7.0-11.4.10.0.1.2.0 on Solaris 11.4 | Jun 26, 2019 | Jun 26, 2019 |
| Oracle_linux | — | Upgrade firefoxUpgrade thunderbird | May 24, 2019 | May 22, 2019 |
| Redhat_linux | — | Upgrade firefox-debuginfoUpgrade thunderbird-debuginfoUpgrade thunderbird-debugsourceUpgrade firefox-debugsourceUpgrade thunderbirdUpgrade firefox | May 24, 2019 | May 23, 2019 |
| Suse | — | Upgrade MozillaFirefox-translations-otherUpgrade MozillaThunderbird-buildsymbolsUpgrade MozillaThunderbird-translations-otherUpgrade mozillafirefox-buildsymbolsUpgrade MozillaFirefoxUpgrade MozillaFirefox-translations-commonUpgrade MozillaThunderbirdUpgrade MozillaThunderbird-translations-commonUpgrade MozillaFirefox-develUpgrade mozillafirefox-branding-upstream | Jun 1, 2019 | May 21, 2019 |
| Ubuntu | — | Upgrade firefoxUpgrade thunderbird | May 22, 2019 | May 21, 2019 |
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