Memory safety bugs present in Firefox 136 and Thunderbird 136. 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 137 and Thunderbird 137.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Freebsd | — | Upgrade firefoxUpgrade librewolfUpgrade thunderbird | Apr 9, 2025 | Apr 7, 2025 |
| Gentoo Linux | — | Upgrade www-client/firefox.Upgrade mail-client/thunderbird.Upgrade mail-client/thunderbird-bin.Upgrade www-client/firefox-bin.Upgrade dev-lang/spidermonkey. | May 13, 2025 | Apr 1, 2025 |
| Mfsa2025 20 | — | Upgrade to the latest version of Mozilla FirefoxUpgrade to Mozilla Firefox version 137.0 | Apr 2, 2025 | Apr 1, 2025 |
| Mozilla Thunderbird | — | Upgrade to the latest version of Mozilla ThunderbirdUpgrade to Mozilla Thunderbird version 137.0 | Apr 2, 2025 | Apr 1, 2025 |
| Ubuntu | — | Upgrade thunderbird | Jun 26, 2025 | Apr 1, 2025 |
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub