Debian/thunderbird: critical 9.8
Memory safety bugs present in 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
Action: Upgrade thunderbird to 1:140.9.0esr-1 or later.
Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 1:140.9.0esr-1 | - |
Fixed versions
| 1:140.9.0esr-1 |
Sources
- osv: DEBIAN-CVE-2026-4720#Debian:14/thunderbird
- https://security-tracker.debian.org/tracker/CVE-2026-4720
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