CVE-2026-43964
CVSS Score
3.7
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-193 |
| Vendor | postfix |
| Product | postfix |
| Published | May 4, 2026 |
| Last Updated | Jul 15, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Affected Versions
Postfix / Postfix
2.3 < 3.8.16 3.9 < 3.9.10 3.10 < 3.10.9
References
mail-archive.com: https://www.mail-archive.com/[email protected]/msg00110.html openwall.com: http://www.openwall.com/lists/oss-security/2026/05/04/30 access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-43964 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2466488 security.access.redhat.com: https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43964.json access.redhat.com: https://access.redhat.com/errata/RHSA-2026:25930 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:25932 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:26205