Vulnerability Description
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.
CVSS Score
3.7
LOW
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Postfix | Postfix | < 3.8.16 |
Related Weaknesses (CWE)
References
- https://www.mail-archive.com/[email protected]/msg00110.htmlMailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2026/05/04/30Mailing ListThird Party Advisory
- https://access.redhat.com/errata/RHSA-2026:25930
- https://access.redhat.com/errata/RHSA-2026:25932
- https://access.redhat.com/errata/RHSA-2026:26205
- https://access.redhat.com/errata/RHSA-2026:50963
- https://access.redhat.com/errata/RHSA-2026:50964
- https://access.redhat.com/errata/RHSA-2026:51034
- https://access.redhat.com/errata/RHSA-2026:51436
- https://access.redhat.com/errata/RHSA-2026:57174
- https://access.redhat.com/security/cve/CVE-2026-43964
- https://bugzilla.redhat.com/show_bug.cgi?id=2466488
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43964.json
FAQ
What is CVE-2026-43964?
CVE-2026-43964 is a vulnerability with a CVSS score of 3.7 (LOW). 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.
How severe is CVE-2026-43964?
CVE-2026-43964 has been rated LOW with a CVSS base score of 3.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-43964?
Check the references section above for vendor advisories and patch information. Affected products include: Postfix Postfix.