Memory safety bugs present in Firefox ESR 140.11, Thunderbird ESR 140.11, Firefox 151 and Thunderbird 151. 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 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade thunderbirdUpgrade firefox-x11Upgrade firefox | Jun 23, 2026 | Jun 22, 2026 |
| Amazon Linux Ami 2 | — | Upgrade thunderbirdUpgrade firefox | Jul 8, 2026 | Jul 8, 2026 |
| Amazon_linux_2023 | — | Upgrade firefoxUpgrade firefox-debugsourceUpgrade firefox-debuginfo | Jul 8, 2026 | Jun 16, 2026 |
| Debian | — | Upgrade firefox-esrUpgrade thunderbird | Jun 21, 2026 | Jun 21, 2026 |
| Mfsa2026 57 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox version 152.0 | Jun 16, 2026 | Jun 16, 2026 |
| Mfsa2026 58 | — | Upgrade to Mozilla Firefox ESR version 140.12Upgrade to the latest version of Mozilla Firefox | Jun 16, 2026 | Jun 16, 2026 |
| Mozilla Thunderbird | — | Upgrade to Mozilla Thunderbird version 140.12Upgrade to the latest version of Mozilla Thunderbird | Jun 21, 2026 | Jun 16, 2026 |
| Oracle_linux | — | Upgrade thunderbirdUpgrade firefox-x11Upgrade firefox | Oct 22, 2026 | Jun 16, 2026 |
| Redhat_linux | — | Upgrade thunderbird-debuginfoUpgrade thunderbirdUpgrade firefox-debugsourceUpgrade firefoxUpgrade firefox-debuginfoNo solution existsUpgrade thunderbird-debugsourceUpgrade firefox-x11 | Jun 23, 2026 | Jun 16, 2026 |
| Rocky_linux | — | Upgrade thunderbird-debugsourceUpgrade thunderbirdUpgrade firefox-debugsourceUpgrade firefox-x11Upgrade firefox-debuginfoUpgrade thunderbird-debuginfoUpgrade firefox | Jun 29, 2026 | Jun 26, 2026 |
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