Use-after-free in the Layout: Text and Fonts component. This vulnerability was fixed in Firefox 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.
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 firefox-x11Upgrade firefoxUpgrade thunderbird | Mar 31, 2026 | Mar 26, 2026 |
| Amazon Linux Ami 2 | — | Upgrade thunderbirdUpgrade firefox | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade firefox-debugsourceUpgrade firefox-debuginfoUpgrade firefox | Apr 14, 2026 | Mar 24, 2026 |
| Debian | — | Upgrade thunderbirdUpgrade firefox-esr | Mar 30, 2026 | Mar 30, 2026 |
| Freebsd | — | Upgrade thunderbirdUpgrade firefox-esrUpgrade firefox | Mar 27, 2026 | Mar 26, 2026 |
| Mfsa2026 20 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox version 149.0 | Mar 27, 2026 | Mar 24, 2026 |
| Mfsa2026 21 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 115.34 | Mar 27, 2026 | Mar 24, 2026 |
| Mfsa2026 22 | — | Upgrade to Mozilla Firefox ESR version 140.9Upgrade to the latest version of Mozilla Firefox | Mar 27, 2026 | Mar 24, 2026 |
| Mozilla Thunderbird | — | Upgrade to the latest version of Mozilla ThunderbirdUpgrade to Mozilla Thunderbird version 140.9 | Mar 27, 2026 | Mar 24, 2026 |
| Oracle_linux | — | Upgrade firefox-x11Upgrade firefoxUpgrade thunderbird | Mar 30, 2026 | Mar 24, 2026 |
| Redhat_linux | — | No solution existsUpgrade thunderbird-debuginfoUpgrade firefox-debugsourceUpgrade thunderbird-debugsourceUpgrade firefox-x11Upgrade thunderbirdUpgrade firefoxUpgrade firefox-debuginfo | Mar 27, 2026 | Mar 24, 2026 |
| Rocky_linux | — | Upgrade firefox-x11Upgrade firefox-debugsourceUpgrade firefox-debuginfoUpgrade thunderbirdUpgrade firefoxUpgrade thunderbird-debugsourceUpgrade thunderbird-debuginfo | Apr 8, 2026 | Apr 7, 2026 |
| Suse | — | Upgrade MozillaFirefox-develUpgrade mozillafirefox-branding-upstreamUpgrade MozillaThunderbird-translations-otherUpgrade MozillaThunderbirdUpgrade MozillaThunderbird-translations-commonUpgrade MozillaThunderbird-openpgp-librnpUpgrade MozillaFirefox-translations-otherUpgrade MozillaFirefoxUpgrade MozillaFirefox-translations-common | Mar 30, 2026 | Mar 27, 2026 |
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