CVE-2026-43964

high

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.

References

Advisories
More

https://www.mail-archive.com/[email protected]/msg00110.html

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

https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43964.json

https://bugzilla.redhat.com/show_bug.cgi?id=2466488

https://access.redhat.com/security/cve/CVE-2026-43964

https://access.redhat.com/errata/RHSA-2026:51436

https://access.redhat.com/errata/RHSA-2026:51034

https://access.redhat.com/errata/RHSA-2026:50964

https://access.redhat.com/errata/RHSA-2026:50963

https://access.redhat.com/errata/RHSA-2026:26205

https://access.redhat.com/errata/RHSA-2026:25932

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

Details

Source: Mitre, NVD

Published: 2026-05-04

Updated: 2026-08-07

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Severity: High

CVSS v3

Base Score: 7.5

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