SUSE-SU-2026:2781-1: moderate: Security update for postfix

# Security update for postfix

Announcement ID: SUSE-SU-2026:2781-1  
Release Date: 2026-07-06T14:12:18Z  
Rating: moderate  
References:

  * bsc#1264062

  
Cross-References:

  * CVE-2026-43964

  
CVSS scores:

  * CVE-2026-43964 ( SUSE ):  8.2
    CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
  * CVE-2026-43964 ( SUSE ):  5.9 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-43964 ( NVD ):  3.7 CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
  * CVE-2026-43964 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  * CVE-2026-43964 ( NVD ):  7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

  
Affected Products:

  * Basesystem Module 15-SP7
  * Legacy Module 15-SP7
  * openSUSE Leap 15.6
  * Server Applications Module 15-SP7
  * SUSE Linux Enterprise Desktop 15 SP7
  * SUSE Linux Enterprise Real Time 15 SP7
  * SUSE Linux Enterprise Server 15 SP7
  * SUSE Linux Enterprise Server for SAP Applications 15 SP7

  
  
An update that solves one vulnerability can now be installed.

## Description:

This update for postfix fixes the following issue

  * CVE-2026-43964: buffer overread and process crash via an enhanced status
    code that lacks text after the third number (bsc#1264062).

## Patch Instructions:

To install this SUSE update use the SUSE recommended installation methods like
YaST online_update or "zypper patch".  
Alternatively you can run the command listed for your product:

  * Legacy Module 15-SP7  
    zypper in -t patch SUSE-SLE-Module-Legacy-15-SP7-2026-2781=1

  * Basesystem Module 15-SP7  
    zypper in -t patch SUSE-SLE-Module-Basesystem-15-SP7-2026-2781=1

  * openSUSE Leap 15.6  
    zypper in -t patch SUSE-2026-2781=1

  * Server Applications Module 15-SP7  
    zypper in -t patch SUSE-SLE-Module-Server-Applications-15-SP7-2026-2781=1

## Package List:

  * Legacy Module 15-SP7 (aarch64 ppc64le s390x x86_64)
    * postfix-bdb-3.8.4-150600.3.6.1
    * postfix-bdb-lmdb-debuginfo-3.8.4-150600.3.6.1
    * postfix-bdb-lmdb-3.8.4-150600.3.6.1
    * postfix-bdb-debugsource-3.8.4-150600.3.6.1
    * postfix-bdb-debuginfo-3.8.4-150600.3.6.1
  * Server Applications Module 15-SP7 (aarch64 ppc64le s390x x86_64)
    * postfix-mysql-debuginfo-3.8.4-150600.3.6.1
    * postfix-mysql-3.8.4-150600.3.6.1
    * postfix-debugsource-3.8.4-150600.3.6.1
    * postfix-debuginfo-3.8.4-150600.3.6.1
  * openSUSE Leap 15.6 (aarch64 i586 ppc64le s390x x86_64)
    * postfix-ldap-debuginfo-3.8.4-150600.3.6.1
    * postfix-mysql-debuginfo-3.8.4-150600.3.6.1
    * postfix-postgresql-3.8.4-150600.3.6.1
    * postfix-debugsource-3.8.4-150600.3.6.1
    * postfix-bdb-3.8.4-150600.3.6.1
    * postfix-debuginfo-3.8.4-150600.3.6.1
    * postfix-3.8.4-150600.3.6.1
    * postfix-bdb-lmdb-debuginfo-3.8.4-150600.3.6.1
    * postfix-bdb-lmdb-3.8.4-150600.3.6.1
    * postfix-ldap-3.8.4-150600.3.6.1
    * postfix-bdb-debugsource-3.8.4-150600.3.6.1
    * postfix-mysql-3.8.4-150600.3.6.1
    * postfix-postgresql-debuginfo-3.8.4-150600.3.6.1
    * postfix-bdb-debuginfo-3.8.4-150600.3.6.1
  * openSUSE Leap 15.6 (noarch)
    * postfix-devel-3.8.4-150600.3.6.1
    * postfix-doc-3.8.4-150600.3.6.1
  * Basesystem Module 15-SP7 (noarch)
    * postfix-devel-3.8.4-150600.3.6.1
    * postfix-doc-3.8.4-150600.3.6.1
  * Basesystem Module 15-SP7 (aarch64 ppc64le s390x x86_64)
    * postfix-ldap-debuginfo-3.8.4-150600.3.6.1
    * postfix-ldap-3.8.4-150600.3.6.1
    * postfix-debuginfo-3.8.4-150600.3.6.1
    * postfix-3.8.4-150600.3.6.1
    * postfix-debugsource-3.8.4-150600.3.6.1

## References:

  * https://www.suse.com/security/cve/CVE-2026-43964.html
  * https://bugzilla.suse.com/show_bug.cgi?id=1264062