Memory safety bugs present in Thunderbird ESR 140.10.0 and Thunderbird 150.0.0. 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 150.0.1, Firefox ESR 140.10.1, Thunderbird 150.0.1, and Thunderbird 140.10.1.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade firefoxUpgrade thunderbirdUpgrade firefox-x11 | May 24, 2026 | May 20, 2026 |
| Amazon Linux Ami 2 | — | Upgrade thunderbirdUpgrade firefox | May 20, 2026 | May 20, 2026 |
| Debian | — | Upgrade firefox-esrUpgrade thunderbird | May 3, 2026 | May 3, 2026 |
| Freebsd | — | Upgrade firefoxUpgrade thunderbirdUpgrade firefox-esr | May 4, 2026 | May 3, 2026 |
| Mfsa2026 35 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox version 150.0.1 | Apr 28, 2026 | Apr 28, 2026 |
| Mfsa2026 36 | — | Upgrade to Mozilla Firefox ESR version 140.10.1Upgrade to the latest version of Mozilla Firefox | Apr 28, 2026 | Apr 28, 2026 |
| Mozilla Thunderbird | — | Upgrade to the latest version of Mozilla ThunderbirdUpgrade to Mozilla Thunderbird version 140.10.1 | May 3, 2026 | Apr 30, 2026 |
| Oracle_linux | — | Upgrade firefoxUpgrade thunderbirdUpgrade firefox-x11 | May 28, 2026 | Apr 28, 2026 |
| Redhat_linux | — | Upgrade firefox-debuginfoUpgrade firefoxUpgrade thunderbirdUpgrade firefox-debugsourceUpgrade firefox-x11No solution existsUpgrade thunderbird-debugsourceUpgrade thunderbird-debuginfo | May 20, 2026 | Apr 28, 2026 |
| Rocky_linux | — | Upgrade firefox-debugsourceUpgrade thunderbird-debugsourceUpgrade thunderbirdUpgrade thunderbird-debuginfoUpgrade firefox-debuginfoUpgrade firefox-x11Upgrade firefox | May 25, 2026 | May 23, 2026 |
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