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.
Advisories
Source ID Title
Ubuntu USN Ubuntu USN USN-8253-1 Postfix vulnerability
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Sat, 16 May 2026 00:15:00 +0000

Type Values Removed Values Added
Title Postfix Enhanced Status Code Buffer Over-read Crash postfix: buffer over-read via malformed enhanced status code
References
Metrics threat_severity

None

threat_severity

Important


Mon, 04 May 2026 23:30:00 +0000

Type Values Removed Values Added
References

Mon, 04 May 2026 21:45:00 +0000

Type Values Removed Values Added
Title Postfix Enhanced Status Code Buffer Over-read Crash

Mon, 04 May 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 04 May 2026 19:00:00 +0000

Type Values Removed Values Added
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.
First Time appeared Postfix
Postfix postfix
Weaknesses CWE-193
CPEs cpe:2.3:a:postfix:postfix:*:*:*:*:*:*:*:*
Vendors & Products Postfix
Postfix postfix
References
Metrics cvssV3_1

{'score': 3.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-05-04T22:21:13.917Z

Reserved: 2026-05-04T18:10:10.120Z

Link: CVE-2026-43964

cve-icon Vulnrichment

Updated: 2026-05-04T22:21:13.917Z

cve-icon NVD

Status : Analyzed

Published: 2026-05-04T19:16:07.143

Modified: 2026-05-11T21:17:31.630

Link: CVE-2026-43964

cve-icon Redhat

Severity : Important

Publid Date: 2026-05-04T18:10:10Z

Links: CVE-2026-43964 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-05-04T23:30:10Z

Weaknesses