Memory safety bugs present in Firefox 141 and Thunderbird 141. 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 142 and Thunderbird 142.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Dell Powerstore Dsa2026115 | — | Upgrade Dell PowerStoreOS to the latest version | Feb 25, 2026 | Feb 24, 2026 |
| Freebsd | — | Upgrade 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 |
| Mozilla Thunderbird | — | Upgrade to the latest version of Mozilla ThunderbirdUpgrade to Mozilla Thunderbird version 142.0 | Aug 22, 2025 | Aug 19, 2025 |
| Suse | — | Upgrade libfreebl3-32bitUpgrade mozilla-nss-develUpgrade mozilla-nss-certsUpgrade MozillaFirefox-translations-otherUpgrade mozilla-nss-certs-32bitUpgrade libfreebl3Upgrade mozilla-nss-32bitUpgrade mozilla-nss-toolsUpgrade MozillaFirefoxUpgrade libsoftokn3Upgrade MozillaFirefox-translations-commonUpgrade libsoftokn3-32bitUpgrade mozilla-nssUpgrade mozillafirefox-branding-upstreamUpgrade mozilla-nss-sysinitUpgrade mozilla-nss-sysinit-32bitUpgrade MozillaFirefox-devel | Dec 5, 2025 | Aug 28, 2025 |
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