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SUSE Leap 15.3 Postfix Moderate Buffer Overread Vuln 2026-2489-1

suse
Calendar Grey June 22, 2026
Dist Suse Esm H88
Discover the security update for Postfix addressing a moderate vulnerability on openSUSE Leap 15.3, improving system safety.
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: * openSUSE Leap 15.3 zypper in -t patch SUSE-2026-2489=1 ## Package List: * openSUSE Leap 15.3 (aarch64 i586 ppc64le s390x x86_64) * postfix-postgresql-debuginfo-3.5.9-150300.5.20.1 * postfix-postgresql-3.5.9-150300.5.20.1 * postfix-mysql-debuginfo-3.5.9-150300.5.20.1 * postfix-bdb-lmdb-debuginfo-3.5.9-150300.5.20.1 * postfix-bdb-debuginfo-3.5.9-150300.5.20.1 * postfix-devel-3.5.9-150300.5.20.1

Topics%20covered

Topics Covered

security advisory moderate SuSE postfix buffer overread cve-2026-43964

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

Affected Products:

* openSUSE Leap 15.3

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
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Critical

Announcement ID: SUSE-SU-2026:2489-1
Release Date: 2026-06-22T12:16:27Z
Rating: moderate

Topics%20covered

Topics Covered

security advisory moderate SuSE postfix buffer overread cve-2026-43964

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