Memory safety bugs present in Thunderbird 140.10 and Thunderbird 150. 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 was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade firefox-x11Upgrade firefoxUpgrade thunderbird | May 31, 2026 | May 27, 2026 |
| Amazon Linux Ami 2 | — | Upgrade thunderbirdUpgrade firefox | Jun 9, 2026 | Jun 9, 2026 |
| Amazon_linux_2023 | — | Upgrade firefox-debugsourceUpgrade firefox-debuginfoUpgrade firefox | Jun 9, 2026 | May 19, 2026 |
| Debian | — | Upgrade firefox-esrUpgrade thunderbird | May 24, 2026 | May 24, 2026 |
| Mfsa2026 46 | — | Upgrade to Mozilla Firefox version 151.0Upgrade to the latest version of Mozilla Firefox | May 19, 2026 | May 19, 2026 |
| Mfsa2026 48 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 140.11 | May 19, 2026 | May 19, 2026 |
| Mozilla Thunderbird | — | Upgrade to Mozilla Thunderbird version 140.11Upgrade to the latest version of Mozilla Thunderbird | May 20, 2026 | May 19, 2026 |
| Oracle_linux | — | Upgrade firefoxUpgrade thunderbirdUpgrade firefox-x11 | May 29, 2026 | May 19, 2026 |
| Redhat_linux | — | Upgrade firefox-x11Upgrade firefoxUpgrade firefox-debugsourceUpgrade firefox-debuginfoNo solution existsUpgrade thunderbird-debuginfoUpgrade thunderbird-debugsourceUpgrade thunderbird | Jun 3, 2026 | May 19, 2026 |
| Rocky_linux | — | Upgrade thunderbirdUpgrade firefoxUpgrade firefox-x11Upgrade thunderbird-debugsourceUpgrade firefox-debugsourceUpgrade thunderbird-debuginfoUpgrade firefox-debuginfo | Jun 1, 2026 | May 29, 2026 |
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