Upstream note:
* Bugfix (defect introduced: Postfix 2.3, date: 20050323): buffer
over-read when Postfix an enhanced status code is not followed
by other text. For example, "5.7.2" without text after the
three-number code. This CANNOT be triggered with an SMTP or
LMTP server response; is confirmed with an access(5) table and
likely with a policy server response; can possibly be triggered
with pipe-to-command output, header_checks(5), body_checks(5),
an error(8) transport in transport_maps, or a milter response;
and is confirmed with a DNSBL server TXT response while Postfix
is configured with "$rbl_code $rbl_text" in rbl_reply_maps or
default_rbl_reply. This could result in process termination.
Problem reported by Kamil Frankowicz.
Resolves-Vulnerability: CVE-2026-43964
Resolves: RHEL-176548
