CVE-2026-43964

Name
CVE-2026-43964
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.
NVD Severity
unknown
Other trackers
CVE, NVD, CERT, CVE Details, CIRCL, Arch Linux, Debian, Red Hat, Ubuntu, Gentoo, SUSE (Bugzilla), SUSE (CVE), Mageia
Mailing lists
oss-security, full-disclosure, bugtraq
Exploits
Exploit DB, Metasploit
Forges
GitHub (code, issues), Aports (code, issues)

References

Type URI
cve@mitre.org https://www.mail-archive.com/postfix-announce@postfix.org/msg00110.html
af854a3a-2127-422b-91ae-364da2661108 http://www.openwall.com/lists/oss-security/2026/05/04/30

Match rules

CPE URI Source package Min version Max version
cpe:2.3:a:postfix:postfix:*:*:*:*:*:*:*:* postfix >= None < 3.8.16
cpe:2.3:a:postfix:postfix:*:*:*:*:*:*:*:* postfix >= 3.9.0 < 3.9.10
cpe:2.3:a:postfix:postfix:*:*:*:*:*:*:*:* postfix >= 3.10.0 < 3.10.9

Vulnerable and fixed packages

Source package Branch Version Maintainer Status
postfix edge-main 3.10.8-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix edge-main 3.10.7-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix edge-main 3.10.7-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix edge-main 3.10.6-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix edge-main 3.10.5-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix edge-main 3.10.4-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix edge-main 3.10.3-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix edge-main 3.10.2-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix edge-main 3.10.1-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix edge-main 3.10.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix edge-main 3.10.0-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix edge-main 3.9.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix edge-main 3.9.0-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix 3.23-main 3.10.8-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix 3.23-main 3.10.7-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix 3.22-main 3.10.8-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix 3.22-main 3.10.7-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix 3.22-main 3.10.6-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix 3.22-main 3.10.5-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix 3.22-main 3.10.4-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix 3.22-main 3.10.3-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix 3.22-main 3.10.2-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix 3.21-main 3.9.9-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix 3.21-main 3.9.8-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix 3.21-main 3.9.7-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix 3.21-main 3.9.6-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix 3.21-main 3.9.5-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix 3.21-main 3.9.4-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix 3.21-main 3.9.3-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix 3.21-main 3.9.2-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix 3.21-main 3.9.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix 3.20-main 3.9.9-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix 3.20-main 3.9.8-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix 3.20-main 3.9.7-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix 3.20-main 3.9.6-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix 3.20-main 3.9.5-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix 3.20-main 3.9.3-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix 3.20-main 3.9.2-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix 3.20-main 3.9.1-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix 3.20-main 3.9.0-r1 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix 3.19-main 3.8.13-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix 3.19-main 3.8.12-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix 3.19-main 3.8.11-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix 3.19-main 3.8.9-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix 3.19-main 3.8.8-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix 3.19-main 3.8.7-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable
postfix 3.19-main 3.8.6-r0 Natanael Copa <ncopa@alpinelinux.org> possibly vulnerable