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Fedora 43 Postfix Critical Buffer Over-read Fix Advisory 2026-e9fc21d7e2

fedora
Calendar Grey June 2, 2026
Dist Fedora Esm H88
Fedora 43 update addresses CVE-2026-43964 in Postfix, resolving buffer over-read issue with critical impact.
This is an update fixing CVE-2026-43964.

Summary

Postfix is a Mail Transport Agent (MTA).

Update Information:

This is an update fixing CVE-2026-43964.

Topics%20covered

Topics Covered

security advisory fedora critical postfix buffer over-read CVE

Change Log

* Mon May 18 2026 Jaroslav Škarvada - 2:3.10.10-1 - New version Resolves: CVE-2026-43964

References


[ 1 ] Bug #2477885 - CVE-2026-43964 postfix: buffer over-read via malformed enhanced status code [fedora-all] https://bugzilla.redhat.com/show_bug.cgi?id=2477885

Update Instructions

This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-e9fc21d7e2' at the command line. For more information, refer to the dnf documentation available at http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label

Severity
critical
Lowest
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Critical

Name: postfix
Product: Fedora 43
Version: 3.10.10
Release: 1.fc43
URL: http://www.postfix.org
Summary: Postfix Mail Transport Agent

Topics%20covered

Topics Covered

security advisory fedora critical postfix buffer over-read CVE

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