CVE-2026-43964

Published: May 4, 2026Modified: Jul 15, 2026

7.5

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitability: 3.9 / Impact: 3.6

Source: NVD

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.

Affected (3)

Products: Postfix: Postfix

Postfix

1 product

Postfix

Configuration A

3 vulnerable

Vulnerable Software	Affected Versions
Postfix Postfix	Before 3.8.16
Postfix Postfix	From 3.10.0 to 3.10.9
Postfix Postfix	From 3.9.0 to 3.9.10

Related CWEs

CWE-193

Off-by-one Error

A product calculates or uses an incorrect maximum or minimum value that is 1 more, or 1 less, than the correct value.

References (8)

https://www.mail-archive.com/postfix-announce@postfix.org/msg00110.html

Source: cve@mitre.org

Mailing ListThird Party Advisory

http://www.openwall.com/lists/oss-security/2026/05/04/30

Source: af854a3a-2127-422b-91ae-364da2661108

Mailing ListThird Party Advisory

https://access.redhat.com/errata/RHSA-2026:25930