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, Firefox ESR 115.35.1, Thunderbird 150.0.1, and Thunderbird 140.10.1.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade thunderbirdUpgrade firefoxUpgrade 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 firefox-esrUpgrade firefox | Apr 30, 2026 | Apr 29, 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 |
| Mfsa2026 37 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 115.35.1 | Apr 28, 2026 | Apr 28, 2026 |
| Mozilla Thunderbird | — | Upgrade to Mozilla Thunderbird version 140.10.1Upgrade to the latest version of Mozilla Thunderbird | May 3, 2026 | Apr 30, 2026 |
| Oracle_linux | — | Upgrade firefox-x11Upgrade firefoxUpgrade thunderbird | May 28, 2026 | Apr 28, 2026 |
| Redhat_linux | — | Upgrade firefox-x11No solution existsUpgrade thunderbirdUpgrade firefox-debuginfoUpgrade firefox-debugsourceUpgrade thunderbird-debugsourceUpgrade firefoxUpgrade thunderbird-debuginfo | May 20, 2026 | Apr 28, 2026 |
| Rocky_linux | — | Upgrade firefox-debugsourceUpgrade thunderbird-debuginfoUpgrade firefox-debuginfoUpgrade firefoxUpgrade firefox-x11Upgrade thunderbird-debugsourceUpgrade thunderbird | May 25, 2026 | May 23, 2026 |
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