A compromised web process using malicious IPC messages could have caused the privileged browser process to reveal blocks of its memory to the compromised process. This vulnerability was fixed in Firefox 144, Firefox ESR 115.29, Firefox ESR 140.4, Thunderbird 144, and Thunderbird 140.4.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade firefox-x11Upgrade thunderbirdUpgrade firefox | Oct 21, 2025 | Oct 20, 2025 |
| Amazon Linux Ami 2 | — | Upgrade thunderbirdUpgrade firefox | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade firefox-debugsourceUpgrade firefoxUpgrade firefox-debuginfo | Oct 28, 2025 | Oct 14, 2025 |
| Debian | — | Upgrade firefox-esrUpgrade thunderbird | Oct 21, 2025 | Oct 21, 2025 |
| Freebsd | — | Upgrade firefox-esrUpgrade firefoxUpgrade thunderbird | Dec 10, 2025 | Oct 19, 2025 |
| Mfsa2025 81 | — | Upgrade to Mozilla Firefox version 144.0Upgrade to the latest version of Mozilla Firefox | Oct 15, 2025 | Oct 14, 2025 |
| Mfsa2025 82 | — | Upgrade to Mozilla Firefox ESR version 115.29Upgrade to the latest version of Mozilla Firefox | Oct 15, 2025 | Oct 14, 2025 |
| Mfsa2025 83 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 140.4 | Oct 15, 2025 | Oct 14, 2025 |
| Mozilla Thunderbird | — | Upgrade to the latest version of Mozilla ThunderbirdUpgrade to Mozilla Thunderbird version 140.4 | Oct 15, 2025 | Oct 14, 2025 |
| Oracle_linux | — | Upgrade firefoxUpgrade thunderbirdUpgrade firefox-x11 | Oct 17, 2025 | Oct 14, 2025 |
| Redhat_linux | — | Upgrade firefox-x11Upgrade firefox-debugsourceUpgrade firefox-debuginfoUpgrade thunderbirdUpgrade thunderbird-debuginfoUpgrade firefoxUpgrade thunderbird-debugsourceNo solution exists | Oct 16, 2025 | Oct 14, 2025 |
| Rocky_linux | — | Upgrade firefox-debugsourceUpgrade firefox-x11Upgrade firefoxUpgrade thunderbirdUpgrade firefox-debuginfoUpgrade thunderbird-debugsourceUpgrade thunderbird-debuginfo | Feb 5, 2026 | Oct 23, 2025 |
| Suse | — | Upgrade mozillafirefox-branding-upstreamUpgrade MozillaFirefox-translations-otherUpgrade MozillaThunderbird-translations-commonUpgrade MozillaThunderbird-translations-otherUpgrade MozillaThunderbirdUpgrade MozillaFirefox-develUpgrade MozillaFirefox-translations-commonUpgrade MozillaFirefoxUpgrade MozillaThunderbird-openpgp-librnp | Dec 5, 2025 | Oct 17, 2025 |
| Ubuntu | — | Upgrade thunderbird | Feb 4, 2026 | Feb 2, 2026 |
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