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SUSE Postfix Moderate Buffer Overread Risk CVE-2026-43964

suse
Calendar Grey July 1, 2026
Dist Suse Esm H88
A critical security update addresses a buffer overread issue in postfix for SUSE. Install now for system security.
An update that solves one vulnerability can now be installed.

Summary

## 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: * SUSE Linux Enterprise Server 16.0 zypper in -t patch SUSE-SLES-16.0-1032=1 * SUSE Linux Enterprise Server for SAP applications 16.0 zypper in -t patch SUSE-SLES-16.0-1032=1 ## Package List: * SUSE Linux Enterprise Server 16.0 (aarch64 ppc64le s390x x86_64) * postfix-mysql-debuginfo-3.10.2-160000.3.1 * postfix-postgresql-debuginfo-3.10.2-160000.3.1 * postfix-3.10.2-160000.3.1 * postfix-mysql-3.10.2-160000.3.1

Topics%20covered

Topics Covered

security advisory moderate update buffer overflow SuSE postfix

References

* bsc#1264062

Cross-

* 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:

* SUSE Linux Enterprise Server 16.0

* SUSE Linux Enterprise Server for SAP applications 16.0

An update that solves one vulnerability can now be installed.

##

* https://www.suse.com/security/cve/CVE-2026-43964.html

* https://bugzilla.suse.com/show_bug.cgi?id=1264062

Severity
moderate
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:22335-1
Release Date: 2026-06-22T14:37:16Z
Rating: moderate

Topics%20covered

Topics Covered

security advisory moderate update buffer overflow SuSE postfix

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