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.
CVSS Details
- CVSS 3.1 Base Score: 9.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade firefoxUpgrade thunderbirdUpgrade firefox-x11 | Aug 28, 2025 | Aug 25, 2025 |
| Amazon Linux Ami 2 | — | Upgrade firefoxUpgrade thunderbird | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade firefox-debuginfoUpgrade firefox-debugsourceUpgrade firefox | Sep 9, 2025 | Aug 19, 2025 |
| Debian | — | Upgrade firefox-esrUpgrade thunderbird | Aug 22, 2025 | Aug 22, 2025 |
| Freebsd | — | Upgrade firefox-esrUpgrade thunderbirdUpgrade firefox | Dec 10, 2025 | Aug 21, 2025 |
| Mfsa2025 64 | — | Upgrade to Mozilla Firefox version 142.0Upgrade to the latest version of Mozilla Firefox | 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 the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 128.14 | Aug 21, 2025 | Aug 19, 2025 |
| Mfsa2025 67 | — | Upgrade to Mozilla Firefox ESR version 140.2Upgrade to the latest version of Mozilla Firefox | 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 | — | No solution existsUpgrade firefox-debuginfoUpgrade firefox-x11Upgrade thunderbird-debuginfoUpgrade thunderbirdUpgrade firefoxUpgrade firefox-debugsourceUpgrade thunderbird-debugsource | Aug 26, 2025 | Aug 19, 2025 |
| Rocky_linux | — | Upgrade thunderbird-debuginfoUpgrade firefox-debuginfoUpgrade firefox-x11Upgrade thunderbirdUpgrade firefoxUpgrade thunderbird-debugsourceUpgrade firefox-debugsource | Feb 5, 2026 | Sep 8, 2025 |
| Suse | — | Upgrade mozillafirefox-branding-upstreamUpgrade MozillaFirefoxUpgrade MozillaFirefox-translations-commonUpgrade MozillaFirefox-translations-otherUpgrade MozillaThunderbird-translations-otherUpgrade MozillaThunderbird-translations-commonUpgrade MozillaThunderbirdUpgrade MozillaFirefox-devel | Dec 5, 2025 | Aug 29, 2025 |
| Ubuntu | — | Upgrade thunderbird | Feb 4, 2026 | Feb 2, 2026 |
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