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openSUSE Postfix Moderate Buffer Overread Issue 2026-21020-1

opensuse
Calendar Grey June 30, 2026
Dist Opensuse Esm H88
This openSUSE advisory addresses a moderate buffer overread issue in Postfix, recommending patch installation for users.
An update that solves one vulnerability and has one bug fix 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 openSUSE security 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 16.0

zypper in -t patch openSUSE-Leap-16.0-1032=1

Topics%20covered

Topics Covered

security advisory moderate postfix OpenSUSE buffer overread process crash

Patch

Package List

- openSUSE Leap 16.0:

postfix-3.10.2-160000.3.1

postfix-bdb-3.10.2-160000.3.1

postfix-bdb-lmdb-3.10.2-160000.3.1

postfix-devel-3.10.2-160000.3.1

postfix-doc-3.10.2-160000.3.1

postfix-ldap-3.10.2-160000.3.1

postfix-mysql-3.10.2-160000.3.1

postfix-postgresql-3.10.2-160000.3.1

References

* bsc#1264062

References:

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

Severity
moderate
Lowest
Low
Medium
High
Critical

Announcement ID: openSUSE-SU-2026:21020-1
Rating: moderate
Affected Products: openSUSE Leap 16.0 -------------------------------------------------------------

Topics%20covered

Topics Covered

security advisory moderate postfix OpenSUSE buffer overread process crash

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