Memory safety bugs present in Firefox 138 and Thunderbird 138. 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 139 and Thunderbird 139.
CVSS Details
- CVSS 3.1 Base Score: 7.3
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Freebsd | freebsd-upgrade-package-firefoxfreebsd-upgrade-package-thunderbird | May 31, 2025 | May 30, 2025 | |
| Mfsa2025 42 | mozilla-firefox-upgrade-139_0 | May 28, 2025 | May 27, 2025 | |
| Mozilla Thunderbird | mozilla-thunderbird-upgrade-139_0 | May 28, 2025 | May 27, 2025 | |
| Redhat_linux | no-fix-redhat-rpm-package | Jul 9, 2025 | May 27, 2025 | |
| Ubuntu | ubuntu-upgrade-thunderbird | Jun 26, 2025 | May 27, 2025 |
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