An attacker was able to perform memory corruption in the GMP process which processes encrypted media. This process is also heavily sandboxed, but represents slightly different privileges from the content process. This vulnerability was fixed in Firefox 142, Firefox ESR 115.27, Firefox ESR 128.14, Firefox ESR 140.2, Thunderbird 142, Thunderbird 128.14, and Thunderbird 140.2.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade thunderbirdUpgrade firefoxUpgrade firefox-x11 | Aug 28, 2025 | Aug 25, 2025 |
| Amazon Linux Ami 2 | — | Upgrade thunderbirdUpgrade firefox | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade firefoxUpgrade firefox-debuginfoUpgrade firefox-debugsource | Sep 9, 2025 | Aug 19, 2025 |
| Debian | — | Upgrade thunderbirdUpgrade firefox-esr | Aug 22, 2025 | Aug 22, 2025 |
| Freebsd | — | Upgrade firefoxUpgrade thunderbirdUpgrade firefox-esr | Dec 10, 2025 | Aug 21, 2025 |
| Mfsa2025 64 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox version 142.0 | Aug 21, 2025 | Aug 19, 2025 |
| Mfsa2025 65 | — | Upgrade to Mozilla Firefox ESR version 115.27Upgrade to the latest version of Mozilla Firefox | Aug 21, 2025 | Aug 19, 2025 |
| Mfsa2025 66 | — | Upgrade to Mozilla Firefox ESR version 128.14Upgrade to the latest version of Mozilla Firefox | Aug 21, 2025 | Aug 19, 2025 |
| Mfsa2025 67 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 140.2 | Aug 21, 2025 | Aug 19, 2025 |
| Mozilla Thunderbird | — | Upgrade to Mozilla Thunderbird version 140.2Upgrade to the latest version of Mozilla Thunderbird | Aug 22, 2025 | Aug 19, 2025 |
| Oracle_linux | — | Upgrade thunderbirdUpgrade firefoxUpgrade firefox-x11 | Aug 26, 2025 | Aug 19, 2025 |
| Redhat_linux | — | Upgrade firefoxUpgrade firefox-x11No solution existsUpgrade thunderbirdUpgrade thunderbird-debuginfoUpgrade firefox-debuginfoUpgrade firefox-debugsourceUpgrade thunderbird-debugsource | Aug 26, 2025 | Aug 19, 2025 |
| Rocky_linux | — | Upgrade firefox-x11Upgrade thunderbird-debuginfoUpgrade thunderbirdUpgrade firefoxUpgrade firefox-debuginfoUpgrade firefox-debugsourceUpgrade thunderbird-debugsource | Feb 5, 2026 | Sep 8, 2025 |
| Suse | — | Upgrade MozillaFirefox-translations-commonUpgrade MozillaThunderbird-translations-otherUpgrade MozillaThunderbirdUpgrade MozillaThunderbird-translations-commonUpgrade MozillaFirefox-translations-otherUpgrade MozillaFirefoxUpgrade mozillafirefox-branding-upstreamUpgrade MozillaFirefox-devel | Dec 5, 2025 | Aug 29, 2025 |
| Ubuntu | — | Upgrade thunderbird | Feb 4, 2026 | Feb 2, 2026 |
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