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.

CVSS v3 3.7 LOW

3.7^/10

CVSS v3 : LOW

Vector :

Exploitability : 2.2 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://www.mail-archive.com/postfix-announce@postfix.org/msg00110.html	Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2026/05/04/30	Mailing List Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:postfix:postfix::::::::
	cpe:2.3:a:postfix:postfix::::::::
	cpe:2.3:a:postfix:postfix::::::::

History

11 May 2026, 21:17

Type	Values Removed	Values Added
CPE		cpe:2.3:a:postfix:postfix::::::::
References	~~() https://www.mail-archive.com/postfix-announce@postfix.org/msg00110.html -~~	() https://www.mail-archive.com/postfix-announce@postfix.org/msg00110.html - Mailing List, Third Party Advisory
References	~~() http://www.openwall.com/lists/oss-security/2026/05/04/30 -~~	() http://www.openwall.com/lists/oss-security/2026/05/04/30 - Mailing List, Third Party Advisory
First Time		Postfix postfix Postfix

04 May 2026, 23:16

Type	Values Removed	Values Added
References		() http://www.openwall.com/lists/oss-security/2026/05/04/30 -

04 May 2026, 19:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-04 19:16

Updated : 2026-05-11 21:17

NVD link : CVE-2026-43964

Mitre link : CVE-2026-43964

CVE.ORG link : CVE-2026-43964

JSON object : View

Products Affected

postfix

postfix

CWE

CWE-193

Off-by-one Error

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