diff --git a/chapter01/changelog.xml b/chapter01/changelog.xml
index 091b0e1f8..8b782f926 100644
--- a/chapter01/changelog.xml
+++ b/chapter01/changelog.xml
@@ -40,6 +40,24 @@
     appropriate for the entry or if needed the entire day's listitem.
     -->
 
+    <listitem>
+      <para>2024-02-02</para>
+      <itemizedlist>
+        <listitem>
+          <para>[xry111] - Update to tzdata-2024a.  Fixes
+          <ulink url='&lfs-ticket-root;5428'>#5428</ulink>.</para>
+        </listitem>
+        <listitem>
+          <para>[xry111] - Update to glibc-2.39 (security fix).  Fixes
+          <ulink url='&lfs-ticket-root;5426'>#5426</ulink>.</para>
+        </listitem>
+        <listitem>
+          <para>[xry111] - Update to linux-6.7.3.  Fixes
+          <ulink url='&lfs-ticket-root;5427'>#5427</ulink>.</para>
+        </listitem>
+      </itemizedlist>
+    </listitem>
+
     <listitem>
       <para>2024-02-01</para>
       <itemizedlist>
diff --git a/chapter01/whatsnew.xml b/chapter01/whatsnew.xml
index ceca1c108..5faf938b7 100644
--- a/chapter01/whatsnew.xml
+++ b/chapter01/whatsnew.xml
@@ -101,9 +101,9 @@
     <listitem>
       <para>Gettext-&gettext-version;</para>
     </listitem>
-    <!--<listitem>
+    <listitem>
       <para>Glibc-&glibc-version;</para>
-    </listitem>-->
+    </listitem>
     <!--<listitem>
       <para>GMP-&gmp-version;</para>
     </listitem>-->
@@ -298,10 +298,6 @@
       <para>setuptools-&setuptools-version;</para>
     </listitem>
 
-    <listitem>
-      <para>&glibc-upstream-fixes-patch;</para>
-    </listitem>
-
     <listitem>
       <para>&pkgconf-upstream-fix-patch;</para>
     </listitem>
diff --git a/chapter02/hostreqs.xml b/chapter02/hostreqs.xml
index f9988cd52..1225352a5 100644
--- a/chapter02/hostreqs.xml
+++ b/chapter02/hostreqs.xml
@@ -100,8 +100,12 @@
       <xref linkend="chapter-building-system"/>, so the workarounds for
       older kernels are not enabled and the compiled
       <application>glibc</application> is slightly faster and smaller.
-      As at June 2023, &min-kernel; is the oldest kernel release still
-      supported by the kernel developers.</para>
+      As at Feb 2024, &min-kernel; is the oldest kernel release still
+      supported by the kernel developers.  Some kernel releases older than
+      &min-kernel; may be still supported by third-party teams, but they
+      are not considered official upstream kernel releases; read
+      <ulink url='https://kernel.org/category/releases.html'/> for the
+      details.</para>
 
       <para>If the host kernel is earlier than &min-kernel; you will need to replace
       the kernel with a more up-to-date version. There are two ways
diff --git a/chapter03/patches.xml b/chapter03/patches.xml
index 106527518..f05fbd604 100644
--- a/chapter03/patches.xml
+++ b/chapter03/patches.xml
@@ -76,7 +76,7 @@
         <para>MD5 sum: <literal>&gcc-upstream-fixes-patch-md5;</literal></para>
       </listitem>
     </varlistentry>
--->
+
     <varlistentry>
       <term>Glibc Upstream Fixes Patch - <token>&glibc-upstream-fixes-patch-size;</token>:</term>
       <listitem>
@@ -84,7 +84,7 @@
         <para>MD5 sum: <literal>&glibc-upstream-fixes-patch-md5;</literal></para>
       </listitem>
     </varlistentry>
-
+-->
     <varlistentry>
       <term>Glibc FHS Patch - <token>&glibc-fhs-patch-size;</token>:</term>
       <listitem>
diff --git a/chapter08/bash.xml b/chapter08/bash.xml
index 4e7a418f5..4b5b47e62 100644
--- a/chapter08/bash.xml
+++ b/chapter08/bash.xml
@@ -75,7 +75,7 @@
 
     <para>To prepare the tests, ensure that the <systemitem class="username">tester</systemitem> user can write to the sources tree:</para>
 
-<screen><userinput remap="test">chown -Rv tester .</userinput></screen>
+<screen><userinput remap="test">chown -R tester .</userinput></screen>
 
     <para>The test suite of this package is designed to be run as a non-&root;
     user who owns the terminal connected to standard input.  To satisfy the
diff --git a/chapter08/coreutils.xml b/chapter08/coreutils.xml
index 96c46996d..655e0dd66 100644
--- a/chapter08/coreutils.xml
+++ b/chapter08/coreutils.xml
@@ -121,7 +121,7 @@ FORCE_UNSAFE_CONFIGURE=1 ./configure \
     <para>Fix some of the permissions so that the non-&root; user can
     compile and run the tests:</para>
 
-<screen><userinput remap="test">chown -Rv tester . </userinput></screen>
+<screen><userinput remap="test">chown -R tester . </userinput></screen>
 
     <para>Now run the tests:</para>
 
diff --git a/chapter08/findutils.xml b/chapter08/findutils.xml
index 7012c221a..5671f6183 100644
--- a/chapter08/findutils.xml
+++ b/chapter08/findutils.xml
@@ -82,7 +82,7 @@ esac</userinput></screen>
 
     <para>To test the results, issue:</para>
 
-<screen><userinput remap="test">chown -Rv tester .
+<screen><userinput remap="test">chown -R tester .
 su tester -c "PATH=$PATH make check"</userinput></screen>
 
     <para>Install the package:</para>
diff --git a/chapter08/gawk.xml b/chapter08/gawk.xml
index a7f74eb92..bc19acaaf 100644
--- a/chapter08/gawk.xml
+++ b/chapter08/gawk.xml
@@ -54,7 +54,7 @@
 
     <para>To test the results, issue:</para>
 
-<screen><userinput remap="test">chown -Rv tester .
+<screen><userinput remap="test">chown -R tester .
 su tester -c "PATH=$PATH make check"</userinput></screen>
 
     <para>Install the package:</para>
diff --git a/chapter08/gcc.xml b/chapter08/gcc.xml
index bfe9f6c67..9e89800cc 100644
--- a/chapter08/gcc.xml
+++ b/chapter08/gcc.xml
@@ -179,7 +179,7 @@ cd       build</userinput></screen>
 
     <para>Test the results as a non-privileged user, but do not stop at errors:</para>
 
-<screen><userinput remap="test">chown -Rv tester .
+<screen><userinput remap="test">chown -R tester .
 su tester -c "PATH=$PATH make -k check"</userinput></screen>
 
     <para>To extract a summary of the test suite results, run:</para>
diff --git a/chapter08/glibc.xml b/chapter08/glibc.xml
index 3cb51c2d0..71301c748 100644
--- a/chapter08/glibc.xml
+++ b/chapter08/glibc.xml
@@ -49,12 +49,12 @@
     store their runtime data in the FHS-compliant locations:</para>
 
 <screen><userinput remap="pre">patch -Np1 -i ../&glibc-fhs-patch;</userinput></screen>
-
+<!--
     <para>Now fix two security vulnerabilities and a regression causing the
     posix_memalign() function very slow in some conditions:</para>
 
 <screen><userinput remap="pre">patch -Np1 -i ../&glibc-upstream-fixes-patch;</userinput></screen>
-
+-->
     <para>The Glibc documentation recommends building Glibc
     in a dedicated build directory:</para>
 
@@ -208,6 +208,121 @@ esac</userinput></screen>
 
 <screen><userinput remap="install">sed '/test-installation/s@$(PERL)@echo not running@' -i ../Makefile</userinput></screen>
 
+    <important>
+      <para>
+        If upgrading Glibc to a new minor version (for example, from
+        Glibc-2.36 to Glibc-&glibc-version;) on a running LFS system, you
+        need to take some extra precautions to avoid breaking the system:
+      </para>
+
+      <itemizedlist>
+        <listitem>
+          <!-- There are two reasons we don't support this:
+               1. Upgrading on a system with separate /lib and /usr/lib is
+                  tricky.
+               2. With Glibc prior to 2.34 libc.so.6 etc. are symlinks to
+                  libc-2.33.so etc., again causing the upgradation tricky.
+                  The Glibc NEWS file explicit states they no longer use
+                  symlinks for the ABI names to avoid upgradation
+                  issues.  -->
+          <para>
+            Upgrading Glibc on a LFS system prior to 11.0 (exclusive) is
+            not supported.  Rebuild LFS if you are running such an old LFS
+            system but you need a newer Glibc.
+          </para>
+        </listitem>
+
+        <!-- https://sourceware.org/pipermail/libc-alpha/2024-January/154095.html -->
+        <listitem>
+          <para>
+            If upgrading on a LFS system prior to 12.0 (exclusive), install
+            <application>Libxcrypt</application> following
+            <xref role='.' linkend='ch-system-libxcrypt'/>  In addition to
+            a normal <application>Libxcrypt</application> installation,
+            <emphasis role='bold'>you MUST follow the note in Libxcrypt
+            section to install
+            <filename class='libraryfile'>libcrypt.so.1*</filename>
+            (overwritting
+            <filename class='libraryfile'>libcrypt.so.1</filename> from the
+            prior Glibc installation)</emphasis>.
+          </para>
+        </listitem>
+
+        <!-- Otherwise on lfs-systemd nscd will fail to start on boot,
+             and on both lfs-sysv and lfs-systemd useradd etc. will try
+             to start nscd, then nscd will fail to start as well and
+             produce some spurious error message.  -->
+        <listitem>
+          <para>
+            If upgrading on a LFS system prior to 12.1 (exclusive),
+            remove the <command>nscd</command> program:
+          </para>
+
+          <screen role='nodump'><userinput>rm -f /usr/sbin/nscd</userinput></screen>
+
+          <para>
+            If this system (prior to LFS 12.1, exclusive) is based on
+            Systemd, it's also needed to disable and stop the
+            <command>nscd</command> service now:
+          </para>
+
+          <screen revision='systemd' role='nodump'><userinput>systemctl disable --now nscd</userinput></screen>
+        </listitem>
+
+        <listitem>
+          <para>
+            Upgrade the kernel and reboot if it's older than &min-kernel;
+            (check the current version with <command>uname -r</command>)
+            or if you want to upgrade it anyway, following
+            <xref linkend='ch-bootable-kernel' role='.'/>
+          </para>
+        </listitem>
+
+        <listitem>
+          <para>
+            Upgrade the kernel API headers if it's older than &min-kernel;
+            (check the current version with
+            <command>cat /usr/include/linux/version.h</command>)
+            or if you want to upgrade it anyway, following
+            <xref linkend='ch-tools-linux-headers'/> (but removing
+            <envar>$LFS</envar> from the <command>cp</command> command).
+          </para>
+        </listitem>
+
+        <!-- This is to ensure we don't start a process at the time point
+             where some Glibc shared libraries are updated but the others
+             are not.  Such mismatches can cause programs crash on startup,
+             esp. a mismatch between ld-linux-x86-64.so.2 and
+             libc.so.6.  Note that a crash in the installation process
+             will leave the system in a state with the mismatch forever,
+             unrecoverable without the help of another distro.  -->
+        <listitem>
+          <para>
+            Perform a <envar>DESTDIR</envar> installation and upgrade
+            the Glibc shared libraries on the system using one single
+            <command>install</command> command:
+          </para>
+
+          <screen role='nodump'><userinput>make DESTDIR=$PWD/dest install
+install -vm755 dest/usr/lib/*.so.* /usr/lib</userinput></screen>
+        </listitem>
+      </itemizedlist>
+
+      <para>
+        It's imperative to strictly follow these steps above unless you
+        completely understand what you are doing.
+        <emphasis role='bold'>Any unexpected deviation may render the
+        system completely unusable.  YOU ARE WARNED.</emphasis>
+      </para>
+
+      <para>
+        Then continue to run the <command>make install</command> command
+        and the <command>sed</command> command against
+        <filename>/usr/bin/ldd</filename>.  Once they are finished, reboot
+        the system immediately.
+      </para>
+    </important>
+
     <para>Install the package:</para>
 
 <screen><userinput remap="install">make install</userinput></screen>
diff --git a/chapter08/make.xml b/chapter08/make.xml
index 186698a58..41a77c649 100644
--- a/chapter08/make.xml
+++ b/chapter08/make.xml
@@ -53,7 +53,7 @@
          https://savannah.gnu.org/bugs/?63852 -->
     <para>To test the results, issue:</para>
 
-<screen><userinput remap="test">chown -Rv tester .
+<screen><userinput remap="test">chown -R tester .
 su tester -c "PATH=$PATH make check"</userinput></screen>
 
     <para>Install the package:</para>
diff --git a/chapter08/pkgmgt.xml b/chapter08/pkgmgt.xml
index 4c7bb6dd7..10ec5d199 100644
--- a/chapter08/pkgmgt.xml
+++ b/chapter08/pkgmgt.xml
@@ -63,21 +63,9 @@
 
       <listitem>
         <para>If Glibc needs to be upgraded to a newer
-        version, (e.g.,  from Glibc-2.31 to Glibc-2.32), it is safer to
-        rebuild LFS.  Though you <emphasis>may</emphasis> be able to rebuild
-        all the packages in their dependency order, we do not recommend
-        it.  </para>
-      </listitem>
-
-      <listitem>
-        <para>Reinstalling the same version of Glibc (&glibc-version; for
-        this release of LFS) with patches should be safe when these patches
-        do not change ABI and API.  When a security vulnerability is found
-        in Glibc, we often need to apply such a patch to fix the
-        vulnerability and reinstall Glibc.  Consult
-        <ulink url='&lfs-root;lfs/advisories/'>LFS security
-        advisories</ulink> if you are alerted for a published Glibc security
-        vulnerability but unsure about the action to take.</para>
+        version, (e.g.,  from Glibc-2.36 to Glibc-&glibc-version;),
+        some extra steps are needed to avoid breaking the system.
+        Read <xref linkend='ch-system-glibc'/> for details.</para>
       </listitem>
 
       <listitem> <para>If a package containing a shared library is updated, and
diff --git a/chapter08/sed.xml b/chapter08/sed.xml
index 4a524c751..75d015600 100644
--- a/chapter08/sed.xml
+++ b/chapter08/sed.xml
@@ -51,7 +51,7 @@ make html</userinput></screen>
 
     <para>To test the results, issue:</para>
 
-<screen><userinput remap="test">chown -Rv tester .
+<screen><userinput remap="test">chown -R tester .
 su tester -c "PATH=$PATH make check"</userinput></screen>
 
     <para>Install the package and its documentation:</para>
diff --git a/chapter08/util-linux.xml b/chapter08/util-linux.xml
index 27691196b..4433f9039 100644
--- a/chapter08/util-linux.xml
+++ b/chapter08/util-linux.xml
@@ -103,7 +103,7 @@
 <screen role="nodump"><userinput>bash tests/run.sh --srcdir=$PWD --builddir=$PWD</userinput></screen>
     </warning>
 
-<screen><userinput remap="test">chown -Rv tester .
+<screen><userinput remap="test">chown -R tester .
 su tester -c "make -k check"</userinput></screen>
 
     <para>The <emphasis>hardlink</emphasis> tests will fail if the host's kernel
diff --git a/chapter08/vim.xml b/chapter08/vim.xml
index 9dd3b4b74..030c50442 100644
--- a/chapter08/vim.xml
+++ b/chapter08/vim.xml
@@ -66,7 +66,7 @@
     <systemitem class="username">tester</systemitem> can write
     to the source tree:</para>
 
-<screen><userinput remap="test">chown -Rv tester .</userinput></screen>
+<screen><userinput remap="test">chown -R tester .</userinput></screen>
 
     <para>Now run the tests as user <systemitem
     class="username">tester</systemitem>:</para>
diff --git a/general.ent b/general.ent
index 31e6daecc..cad537e5b 100644
--- a/general.ent
+++ b/general.ent
@@ -92,9 +92,9 @@
 <!ENTITY test-results    "&lfs-root;lfs/build-logs/&generic-version;/">
 <!ENTITY secadv          "&lfs-root;lfs/advisories/">
 
-<!-- 4.14 EOL is Jan 2024
-     so for LFS 11.5 we may consider moving to 4.19 -->
-<!ENTITY min-kernel      "4.14">
+<!-- 4.19 EOL is Dec 2024
+     so for LFS 12.3 we may consider moving to 5.4 -->
+<!ENTITY min-kernel      "4.19">
 
 <!--
 <!ENTITY patches-rootd   "&lfs-root;patches/lfs/&generic-versiond;/">
diff --git a/lfs-latest-git.php b/lfs-latest-git.php
index 162d8d6c8..c2414789a 100644
--- a/lfs-latest-git.php
+++ b/lfs-latest-git.php
@@ -152,6 +152,7 @@ if ( $package == "tcl"        ) $dirpath = "https://www.tcl.tk/software/tcltk/do
 if ( $package == "util-linux" ) $dirpath = max_parent( $dirpath, "v." );
 if ( $package == "vim"        ) $dirpath = "https://github.com/vim/vim/tags";
 if ( $package == "wheel"      ) $dirpath = "https://pypi.org/project/wheel/#files";
+if ( $package == "xz"         ) $dirpath = github("tukaani-project/xz");
 if ( $package == "zlib"       ) $dirpath = "https://www.zlib.net";
 if ( $package == "zstd"       ) $dirpath = github("facebook/zstd");
 
diff --git a/packages.ent b/packages.ent
index d617c82ca..bd04f55df 100644
--- a/packages.ent
+++ b/packages.ent
@@ -255,10 +255,10 @@
 <!ENTITY gettext-fin-du "250 MB">
 <!ENTITY gettext-fin-sbu "1.4 SBU">
 
-<!ENTITY glibc-version "2.38">
-<!ENTITY glibc-size "18,471 KB">
+<!ENTITY glibc-version "2.39">
+<!ENTITY glibc-size "18,092 KB">
 <!ENTITY glibc-url "&gnu;glibc/glibc-&glibc-version;.tar.xz">
-<!ENTITY glibc-md5 "778cce0ea6bf7f84ca8caacf4a01f45b">
+<!ENTITY glibc-md5 "be81e87f72b5ea2c0ffe2bedfeb680c6">
 <!ENTITY glibc-home "&gnu-software;libc/">
 <!ENTITY glibc-tmp-du "858 MB">
 <!ENTITY glibc-tmp-sbu "1.6 SBU">
@@ -440,12 +440,12 @@
 
 <!ENTITY linux-major-version "6">
 <!ENTITY linux-minor-version "7">
-<!ENTITY linux-patch-version "2">
+<!ENTITY linux-patch-version "3">
 <!--<!ENTITY linux-version "&linux-major-version;.&linux-minor-version;">-->
 <!ENTITY linux-version "&linux-major-version;.&linux-minor-version;.&linux-patch-version;">
-<!ENTITY linux-size "138,085 KB">
+<!ENTITY linux-size "138,128 KB">
 <!ENTITY linux-url "&kernel;linux/kernel/v&linux-major-version;.x/linux-&linux-version;.tar.xz">
-<!ENTITY linux-md5 "62b0a6c979a54569295d34ed57f47875">
+<!ENTITY linux-md5 "a542a2aea4db4cf09e932fff02c8d1d1">
 <!ENTITY linux-home "https://www.kernel.org/">
 <!-- measured for 6.5.3 / gcc-13.2.0 on x86_64 with -j4 : minimum is
  allnoconfig + some configs we recommend for the users, rounded down to
@@ -721,10 +721,10 @@
 <!ENTITY texinfo-fin-du "128 MB">
 <!ENTITY texinfo-fin-sbu "0.3 SBU">
 
-<!ENTITY tzdata-version "2023d">
-<!ENTITY tzdata-size "440 KB">
+<!ENTITY tzdata-version "2024a">
+<!ENTITY tzdata-size "444 KB">
 <!ENTITY tzdata-url "https://www.iana.org/time-zones/repository/releases/tzdata&tzdata-version;.tar.gz">
-<!ENTITY tzdata-md5 "08b9d559939670725ec298fdbb029649">
+<!ENTITY tzdata-md5 "2349edd8335245525cc082f2755d5bf4">
 <!ENTITY tzdata-home "https://www.iana.org/time-zones">
 
 <!ENTITY udev-fin-du "138 MB">
diff --git a/patches.ent b/patches.ent
index c2f957aad..a6e3a306e 100644
--- a/patches.ent
+++ b/patches.ent
@@ -17,11 +17,11 @@
 <!ENTITY glibc-fhs-patch "glibc-&glibc-version;-fhs-1.patch">
 <!ENTITY glibc-fhs-patch-md5 "9a5997c3452909b1769918c759eff8a2">
 <!ENTITY glibc-fhs-patch-size "2.8 KB">
-
+<!--
 <!ENTITY glibc-upstream-fixes-patch "glibc-&glibc-version;-upstream_fixes-4.patch">
 <!ENTITY glibc-upstream-fixes-patch-md5 "66e843b00688c641c9bdda684db45b43">
 <!ENTITY glibc-upstream-fixes-patch-size "36 KB">
-
+-->
 <!ENTITY kbd-backspace-patch "kbd-&kbd-version;-backspace-1.patch">
 <!ENTITY kbd-backspace-patch-md5 "f75cca16a38da6caa7d52151f7136895">
 <!ENTITY kbd-backspace-patch-size "12 KB">