Memory safety bugs present in Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and Thunderbird 148. 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 149, Firefox ESR 115.34, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade firefox-x11Upgrade thunderbirdUpgrade firefox | Mar 31, 2026 | Mar 26, 2026 |
| Amazon Linux Ami 2 | — | Upgrade firefoxUpgrade thunderbird | May 20, 2026 | May 20, 2026 |
| Amazon_linux_2023 | — | Upgrade firefox-debuginfoUpgrade firefoxUpgrade firefox-debugsource | Apr 14, 2026 | Mar 24, 2026 |
| Debian | — | Upgrade firefox-esrUpgrade thunderbird | Mar 30, 2026 | Mar 30, 2026 |
| Freebsd | — | Upgrade firefox-esrUpgrade firefoxUpgrade thunderbird | Mar 27, 2026 | Mar 26, 2026 |
| Mfsa2026 20 | — | Upgrade to Mozilla Firefox version 149.0Upgrade to the latest version of Mozilla Firefox | 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 the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox ESR version 140.9 | Mar 27, 2026 | Mar 24, 2026 |
| Mozilla Thunderbird | — | Upgrade to Mozilla Thunderbird version 140.9Upgrade to the latest version of Mozilla Thunderbird | Mar 27, 2026 | Mar 24, 2026 |
| Oracle_linux | — | Upgrade firefoxUpgrade firefox-x11Upgrade thunderbird | Mar 30, 2026 | Mar 24, 2026 |
| Redhat_linux | — | Upgrade thunderbird-debugsourceUpgrade firefox-debugsourceUpgrade firefox-x11Upgrade firefox-debuginfoUpgrade thunderbird-debuginfoNo solution existsUpgrade firefoxUpgrade thunderbird | Mar 27, 2026 | Mar 24, 2026 |
| Rocky_linux | — | Upgrade firefox-debugsourceUpgrade thunderbird-debugsourceUpgrade firefox-debuginfoUpgrade thunderbirdUpgrade firefoxUpgrade firefox-x11Upgrade thunderbird-debuginfo | Apr 8, 2026 | Apr 7, 2026 |
| Suse | — | Upgrade MozillaFirefoxUpgrade MozillaThunderbird-translations-commonUpgrade mozillafirefox-branding-upstreamUpgrade MozillaThunderbird-openpgp-librnpUpgrade MozillaThunderbirdUpgrade MozillaFirefox-translations-otherUpgrade MozillaFirefox-develUpgrade MozillaThunderbird-translations-otherUpgrade MozillaFirefox-translations-common | Mar 30, 2026 | Mar 27, 2026 |
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