Is Postfix 3.6.21 affected?
Sep 8, 2026 · Release notes ↗
1 known vulnerability affects 3.6.21 (highest CVSS 3.7).
Your branch 3.6 has reached end of life (Feb 16, 2025).
5 newer releases in its track, up to 3.11.7. What changed up to 3.11.7
Vulnerabilities affecting 3.6.21
- 3.7 CVE-2026-43964 Postfix before 3.8.16, 3.9 before 3.9.10, and 3.10 before 3.10.9 sometimes allows a buffer over-read and process crash via an enhanced status code that lacks text after the third number. fixed in 3.8.16
Newer releases
| 3.11.7 | Sep 8, 2026 | 3.6.21 → 3.11.7 |
| 3.10.14 | Sep 8, 2026 | 3.6.21 → 3.10.14 |
| 3.9.15 | Sep 8, 2026 | 3.6.21 → 3.9.15 |
| 3.8.21 | Sep 8, 2026 | 3.6.21 → 3.8.21 |
| 3.7.23 | Sep 8, 2026 | 3.6.21 → 3.7.23 |