CVE-2026-43964
Fixed in a distro release EPSS <1%CVSS 3.7
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.
Products: Postfix, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 7 Extended Lifecycle Support, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On, Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On, Red Hat Enterprise Linux 8.8 Telecommunications Update Service, Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 6
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| AlmaLinux 10 | postfix | 2:3.8.5-10.el10_2 |
| AlmaLinux 10 | postfix-cdb | 2:3.8.5-10.el10_2 |
| AlmaLinux 10 | postfix-ldap | 2:3.8.5-10.el10_2 |
| AlmaLinux 10 | postfix-lmdb | 2:3.8.5-10.el10_2 |
| AlmaLinux 10 | postfix-mysql | 2:3.8.5-10.el10_2 |
| AlmaLinux 10 | postfix-pcre | 2:3.8.5-10.el10_2 |
| AlmaLinux 10 | postfix-perl-scripts | 2:3.8.5-10.el10_2 |
| AlmaLinux 10 | postfix-pgsql | 2:3.8.5-10.el10_2 |
| AlmaLinux 10 | postfix-sqlite | 2:3.8.5-10.el10_2 |
| AlmaLinux 8 | postfix | 2:3.5.8-8.el8_10 |
| AlmaLinux 8 | postfix-cdb | 2:3.5.8-8.el8_10 |
| AlmaLinux 8 | postfix-ldap | 2:3.5.8-8.el8_10 |
| AlmaLinux 8 | postfix-mysql | 2:3.5.8-8.el8_10 |
| AlmaLinux 8 | postfix-pcre | 2:3.5.8-8.el8_10 |
| AlmaLinux 8 | postfix-perl-scripts | 2:3.5.8-8.el8_10 |
| AlmaLinux 8 | postfix-pgsql | 2:3.5.8-8.el8_10 |
| AlmaLinux 8 | postfix-sqlite | 2:3.5.8-8.el8_10 |
| AlmaLinux 9 | postfix | 2:3.5.25-3.el9_8 |
| AlmaLinux 9 | postfix-cdb | 2:3.5.25-3.el9_8 |
| AlmaLinux 9 | postfix-ldap | 2:3.5.25-3.el9_8 |
| AlmaLinux 9 | postfix-lmdb | 2:3.5.25-3.el9_8 |
| AlmaLinux 9 | postfix-mysql | 2:3.5.25-3.el9_8 |
| AlmaLinux 9 | postfix-pcre | 2:3.5.25-3.el9_8 |
| AlmaLinux 9 | postfix-perl-scripts | 2:3.5.25-3.el9_8 |
| AlmaLinux 9 | postfix-pgsql | 2:3.5.25-3.el9_8 |
| AlmaLinux 9 | postfix-sqlite | 2:3.5.25-3.el9_8 |
| Debian 12 | postfix | no fix |
| Debian 13 | postfix | 3.10.10-0+deb13u1 |
| Debian 14 | postfix | 3.11.2-1 |
| Red Hat Enterprise Linux 10.2 | postfix | 2:3.8.5-10.el10_2 |
| Red Hat Enterprise Linux 10.2 | postfix-cdb | 2:3.8.5-10.el10_2 |
| Red Hat Enterprise Linux 10.2 | postfix-cdb-debuginfo | 2:3.8.5-10.el10_2 |
| Red Hat Enterprise Linux 10.2 | postfix-debuginfo | 2:3.8.5-10.el10_2 |
| Red Hat Enterprise Linux 10.2 | postfix-debugsource | 2:3.8.5-10.el10_2 |
| Red Hat Enterprise Linux 10.2 | postfix-ldap | 2:3.8.5-10.el10_2 |
| Red Hat Enterprise Linux 10.2 | postfix-ldap-debuginfo | 2:3.8.5-10.el10_2 |
| Red Hat Enterprise Linux 10.2 | postfix-lmdb | 2:3.8.5-10.el10_2 |
| Red Hat Enterprise Linux 10.2 | postfix-lmdb-debuginfo | 2:3.8.5-10.el10_2 |
| Red Hat Enterprise Linux 10.2 | postfix-mysql | 2:3.8.5-10.el10_2 |
| Red Hat Enterprise Linux 10.2 | postfix-mysql-debuginfo | 2:3.8.5-10.el10_2 |
| Red Hat Enterprise Linux 10.2 | postfix-pcre | 2:3.8.5-10.el10_2 |
| Red Hat Enterprise Linux 10.2 | postfix-pcre-debuginfo | 2:3.8.5-10.el10_2 |
| Red Hat Enterprise Linux 10.2 | postfix-perl-scripts | 2:3.8.5-10.el10_2 |
| Red Hat Enterprise Linux 10.2 | postfix-pgsql | 2:3.8.5-10.el10_2 |
| Red Hat Enterprise Linux 10.2 | postfix-pgsql-debuginfo | 2:3.8.5-10.el10_2 |
| Red Hat Enterprise Linux 10.2 | postfix-sqlite | 2:3.8.5-10.el10_2 |
| Red Hat Enterprise Linux 10.2 | postfix-sqlite-debuginfo | 2:3.8.5-10.el10_2 |
| Red Hat Enterprise Linux 8 | postfix | 2:3.5.8-8.el8_10 |
| Red Hat Enterprise Linux 8 | postfix-cdb | 2:3.5.8-8.el8_10 |
| Red Hat Enterprise Linux 8 | postfix-cdb-debuginfo | 2:3.5.8-8.el8_10 |
| Red Hat Enterprise Linux 8 | postfix-debuginfo | 2:3.5.8-8.el8_10 |
| Red Hat Enterprise Linux 8 | postfix-debugsource | 2:3.5.8-8.el8_10 |
| Red Hat Enterprise Linux 8 | postfix-ldap | 2:3.5.8-8.el8_10 |
| Red Hat Enterprise Linux 8 | postfix-ldap-debuginfo | 2:3.5.8-8.el8_10 |
| Red Hat Enterprise Linux 8 | postfix-lmdb-debuginfo | 2:3.5.8-8.el8_10 |
| Red Hat Enterprise Linux 8 | postfix-mysql | 2:3.5.8-8.el8_10 |
| Red Hat Enterprise Linux 8 | postfix-mysql-debuginfo | 2:3.5.8-8.el8_10 |
| Red Hat Enterprise Linux 8 | postfix-pcre | 2:3.5.8-8.el8_10 |
| Red Hat Enterprise Linux 8 | postfix-pcre-debuginfo | 2:3.5.8-8.el8_10 |
| Red Hat Enterprise Linux 8 | postfix-perl-scripts | 2:3.5.8-8.el8_10 |
| Red Hat Enterprise Linux 8 | postfix-pgsql | 2:3.5.8-8.el8_10 |
| Red Hat Enterprise Linux 8 | postfix-pgsql-debuginfo | 2:3.5.8-8.el8_10 |
| Red Hat Enterprise Linux 8 | postfix-sqlite | 2:3.5.8-8.el8_10 |
| Red Hat Enterprise Linux 8 | postfix-sqlite-debuginfo | 2:3.5.8-8.el8_10 |
| Red Hat Enterprise Linux 9 | postfix | 2:3.5.25-3.el9_8 |
| Red Hat Enterprise Linux 9 | postfix-cdb | 2:3.5.25-3.el9_8 |
| Red Hat Enterprise Linux 9 | postfix-cdb-debuginfo | 2:3.5.25-3.el9_8 |
| Red Hat Enterprise Linux 9 | postfix-debuginfo | 2:3.5.25-3.el9_8 |
| Red Hat Enterprise Linux 9 | postfix-debugsource | 2:3.5.25-3.el9_8 |
| Red Hat Enterprise Linux 9 | postfix-ldap | 2:3.5.25-3.el9_8 |
| Red Hat Enterprise Linux 9 | postfix-ldap-debuginfo | 2:3.5.25-3.el9_8 |
| Red Hat Enterprise Linux 9 | postfix-lmdb | 2:3.5.25-3.el9_8 |
| Red Hat Enterprise Linux 9 | postfix-lmdb-debuginfo | 2:3.5.25-3.el9_8 |
| Red Hat Enterprise Linux 9 | postfix-mysql | 2:3.5.25-3.el9_8 |
| Red Hat Enterprise Linux 9 | postfix-mysql-debuginfo | 2:3.5.25-3.el9_8 |
| Red Hat Enterprise Linux 9 | postfix-pcre | 2:3.5.25-3.el9_8 |
| Red Hat Enterprise Linux 9 | postfix-pcre-debuginfo | 2:3.5.25-3.el9_8 |
| Red Hat Enterprise Linux 9 | postfix-perl-scripts | 2:3.5.25-3.el9_8 |
| Red Hat Enterprise Linux 9 | postfix-pgsql | 2:3.5.25-3.el9_8 |
| Red Hat Enterprise Linux 9 | postfix-pgsql-debuginfo | 2:3.5.25-3.el9_8 |
| Red Hat Enterprise Linux 9 | postfix-sqlite | 2:3.5.25-3.el9_8 |
| Red Hat Enterprise Linux 9 | postfix-sqlite-debuginfo | 2:3.5.25-3.el9_8 |
| Red Hat Enterprise Linux eus 10.0 | postfix | 2:3.8.5-8.el10_0.1 |
| Red Hat rhel aus 8.4 | postfix | 2:3.5.8-1.el8_4.1 |
| Red Hat rhel aus 8.6 | postfix | 2:3.5.8-4.el8_6.1 |
| Red Hat rhel e4s 8.8 | postfix | 2:3.5.8-4.el8_8.1 |
| Red Hat rhel els 7 | postfix | 2:2.10.1-9.el7_9.1 |
| Red Hat rhel eus long life 8.4 | postfix | 2:3.5.8-1.el8_4.1 |
| Red Hat rhel eus long life 8.6 | postfix | 2:3.5.8-4.el8_6.1 |
| Red Hat rhel tus 8.8 | postfix | 2:3.5.8-4.el8_8.1 |
| Rocky Linux 10 | postfix | 2:3.8.5-10.el10_2 |
| Rocky Linux 8 | postfix | 2:3.5.8-8.el8_10 |
| Rocky Linux 9 | postfix | 2:3.5.25-3.el9_8 |
| SUSE Linux Enterprise Module for Basesystem 15 SP7 | postfix | 3.8.4-150600.3.6.1 |
| SUSE Linux Enterprise Module for Legacy 15 SP7 | postfix-bdb | 3.8.4-150600.3.6.1 |
| SUSE Linux Enterprise Module for Server Applications 15 SP7 | postfix | 3.8.4-150600.3.6.1 |
| SUSE Linux Enterprise Server 16.0 | postfix | 3.10.2-160000.3.1 |
| SUSE Linux Enterprise Server LTSS Extended Security 12 SP5 | postfix | 3.2.10-3.33.1 |
| SUSE Linux Enterprise Server for SAP applications 16.0 | postfix | 3.10.2-160000.3.1 |
| Ubuntu 22.04 LTS | postfix | 3.6.4-1ubuntu1.4 |
| Ubuntu 24.04 LTS | postfix | 3.8.6-1ubuntu0.1 |
| Ubuntu 25.10 | postfix | 3.10.2-1ubuntu2.1 |
| Ubuntu 26.04 LTS | postfix | 3.10.6-4ubuntu2.1 |
| Ubuntu Pro 14.04 LTS | postfix | 2.11.0-1ubuntu1.2+esm4 |
| Ubuntu Pro 16.04 LTS | postfix | 3.1.0-3ubuntu0.4+esm4 |
| Ubuntu Pro 18.04 LTS | postfix | 3.3.0-1ubuntu0.4+esm4 |
| Ubuntu Pro 20.04 LTS | postfix | 3.4.13-0ubuntu1.4+esm1 |
| openSUSE Leap 16.0 | postfix | 3.10.2-160000.3.1 |
| openSUSE Leap 16.0 | postfix-bdb | 3.10.2-160000.3.1 |
| openSUSE Tumbleweed | postfix | 3.11.2-1.1 |