Debian/thunderbird: critical 9.8
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
Action: Upgrade thunderbird to 1:140.9.0esr-1~deb13u1 or later.
Affected
| introduced | fixed | last affected |
|---|---|---|
| 0 | 1:140.9.0esr-1~deb13u1 | - |
Fixed versions
| 1:140.9.0esr-1~deb13u1 |
Sources
- osv: DEBIAN-CVE-2026-4721#Debian:13/thunderbird
- https://security-tracker.debian.org/tracker/CVE-2026-4721
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