Memory safety bugs present in Thunderbird ESR 140.10.1 and Thunderbird 150.0.1. 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 150.0.2, Firefox ESR 140.10.2, Firefox ESR 115.35.2, Thunderbird 150.0.2, and Thunderbird 140.10.2.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade thunderbirdUpgrade firefox-x11Upgrade firefox | May 27, 2026 | May 26, 2026 |
| Amazon Linux Ami 2 | — | Upgrade thunderbirdUpgrade firefox | Jun 8, 2026 | Jun 8, 2026 |
| Amazon_linux_2023 | — | Upgrade firefoxUpgrade firefox-debuginfoUpgrade firefox-debugsource | May 28, 2026 | May 7, 2026 |
| Debian | — | Upgrade firefox-esrUpgrade thunderbird | May 10, 2026 | May 10, 2026 |
| Freebsd | — | Upgrade firefox-esrUpgrade firefox | May 13, 2026 | May 8, 2026 |
| Mfsa2026 40 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox version 150.0.2 | May 7, 2026 | May 7, 2026 |
| Mfsa2026 41 | — | Upgrade to Mozilla Firefox ESR version 140.10.2Upgrade to the latest version of Mozilla Firefox | May 7, 2026 | May 7, 2026 |
| Mfsa2026 42 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 115.35.2 | May 7, 2026 | May 7, 2026 |
| Mozilla Thunderbird | — | Upgrade to the latest version of Mozilla ThunderbirdUpgrade to Mozilla Thunderbird version 140.10.2 | May 10, 2026 | May 8, 2026 |
| Oracle_linux | — | Upgrade firefoxUpgrade firefox-x11 | May 28, 2026 | May 7, 2026 |
| Redhat_linux | — | No solution existsUpgrade firefox-x11Upgrade firefox-debugsourceUpgrade thunderbird-debuginfoUpgrade thunderbird-debugsourceUpgrade firefoxUpgrade firefox-debuginfoUpgrade thunderbird | May 20, 2026 | May 7, 2026 |
| Rocky_linux | — | Upgrade firefox-debugsourceUpgrade firefox-debuginfoUpgrade firefox | Jun 1, 2026 | May 29, 2026 |
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