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Release notes for 17.4, 16.8, 15.12, 14.17, 13.20.

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<!-- doc/src/sgml/release-17.sgml -->
<!-- See header comment in release.sgml about typical markup -->
<sect1 id="release-17-4">
<title>Release 17.4</title>
<formalpara>
<title>Release date:</title>
<para>2025-02-20</para>
</formalpara>
<para>
This release contains a few fixes from 17.3.
For information about new features in major release 17, see
<xref linkend="release-17"/>.
</para>
<sect2 id="release-17-4-migration">
<title>Migration to Version 17.4</title>
<para>
A dump/restore is not required for those running 17.X.
</para>
<para>
However, if you are upgrading from a version earlier than 17.1,
see <xref linkend="release-17-1"/>.
</para>
</sect2>
<sect2 id="release-17-4-changes">
<title>Changes</title>
<itemizedlist>
<listitem>
<!--
Author: Andres Freund <andres@anarazel.de>
Branch: master [efdadeb22] 2025-02-14 18:09:19 -0500
Branch: REL_17_STABLE [a92db3d02] 2025-02-14 18:09:21 -0500
Branch: REL_16_STABLE [111f4dd27] 2025-02-14 18:09:23 -0500
Branch: REL_15_STABLE [22ffbbf24] 2025-02-14 18:09:24 -0500
Branch: REL_14_STABLE [985908df1] 2025-02-14 18:09:25 -0500
Branch: REL_13_STABLE [1f7a05324] 2025-02-14 18:09:27 -0500
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [9f45e6a91] 2025-02-15 16:20:21 -0500
Branch: REL_17_STABLE [3abe6e04c] 2025-02-15 16:20:21 -0500
Branch: REL_16_STABLE [991a60a9f] 2025-02-15 16:20:21 -0500
Branch: REL_15_STABLE [e782a63cc] 2025-02-15 16:20:21 -0500
Branch: REL_14_STABLE [c08309584] 2025-02-15 16:20:21 -0500
Branch: REL_13_STABLE [d6d29b213] 2025-02-15 16:20:21 -0500
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [a7f95859e] 2025-02-16 12:46:35 -0500
Branch: REL_17_STABLE [3977bd298] 2025-02-16 12:46:35 -0500
Branch: REL_16_STABLE [644b7d686] 2025-02-16 12:46:35 -0500
Branch: REL_15_STABLE [2226a2e26] 2025-02-16 12:46:35 -0500
Branch: REL_14_STABLE [f864a4cdf] 2025-02-16 12:46:35 -0500
Branch: REL_13_STABLE [9f052613e] 2025-02-16 12:46:35 -0500
-->
<para>
Improve behavior of <application>libpq</application>'s quoting
functions (Andres Freund, Tom Lane)
<ulink url="&commit_baseurl;a92db3d02">&sect;</ulink>
<ulink url="&commit_baseurl;3abe6e04c">&sect;</ulink>
<ulink url="&commit_baseurl;3977bd298">&sect;</ulink>
</para>
<para>
The changes made for CVE-2025-1094 had one serious oversight:
<function>PQescapeLiteral()</function>
and <function>PQescapeIdentifier()</function> failed to honor their
string length parameter, instead always reading to the input
string's trailing null. This resulted in including unwanted text in
the output, if the caller intended to truncate the string via the
length parameter. With very bad luck it could cause a crash due to
reading off the end of memory.
</para>
<para>
In addition, modify all these quoting functions so that when invalid
encoding is detected, an invalid sequence is substituted for just
the first byte of the presumed character, not all of it. This
reduces the risk of problems if a calling application performs
additional processing on the quoted string.
</para>
</listitem>
<listitem>
<!--
Author: Michael Paquier <michael@paquier.xyz>
Branch: master [5b94e2753] 2025-02-12 17:11:43 +0900
Branch: REL_17_STABLE [ff6d9cfcb] 2025-02-12 17:11:47 +0900
-->
<para>
Fix small memory leak
in <application>pg_createsubscriber</application> (Ranier Vilela)
<ulink url="&commit_baseurl;ff6d9cfcb">&sect;</ulink>
</para>
</listitem>
<listitem>
<!--
Author: Andres Freund <andres@anarazel.de>
Branch: master [b64d83115] 2025-02-12 08:15:53 -0500
Branch: REL_17_STABLE [c9a1d2135] 2025-02-12 08:15:53 -0500
Branch: REL_16_STABLE [01cdb98e4] 2025-02-12 08:15:54 -0500
-->
<para>
Fix meson build system to correctly detect availability of
the <filename>bsd_auth.h</filename> system header
(Nazir Bilal Yavuz)
<ulink url="&commit_baseurl;c9a1d2135">&sect;</ulink>
</para>
</listitem>
</itemizedlist>
</sect2>
</sect1>
<sect1 id="release-17-3">
<title>Release 17.3</title>