Vulnerability DatabaseCVE-2026-43964
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CVE-2026-43964
Published:May 04, 2026
Updated:June 23, 2026
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 Packages
https://github.com/vdukhovni/postfix.git (GITHUB):
Affected version(s) >=v3.9.0 <v3.9.10
Fix Suggestion:
Update to version v3.9.10
https://github.com/vdukhovni/postfix.git (GITHUB):
Affected version(s) >=v3.8.0 <v3.8.16
Fix Suggestion:
Update to version v3.8.16
https://github.com/vdukhovni/postfix.git (GITHUB):
Affected version(s) >=v3.10.0 <v3.10.9
Fix Suggestion:
Update to version v3.10.9
Related Resources (2)
https://www.mail-archive.com/postfix-announce@postfix.org/msg00110.html
http://www.openwall.com/lists/oss-security/2026/05/04/30
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CVSS v4
Base Score:
6.3
Attack Vector
NETWORK
Attack Complexity
HIGH
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
LOW
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
3.7
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
LOW
Weakness Type (CWE)
Off-by-one Error
CWE-193
EPSS
Base Score:
0.31