diff --git a/README.scripts b/README.scripts
new file mode 100644
index 0000000..ef528da
--- /dev/null
+++ b/README.scripts
@@ -0,0 +1,2 @@
+All of the useful glibc maintainer scripts are located at:
+https://pagure.io/glibc-maintainer-scripts
diff --git a/glibc.spec b/glibc.spec
index fecf03b..f86ae01 100644
--- a/glibc.spec
+++ b/glibc.spec
@@ -1,6 +1,6 @@
-%define glibcsrcdir  glibc-2.26-513-g11c4f5010c
+%define glibcsrcdir  glibc-2.26-538-g1e26d35
 %define glibcversion 2.26.90
-%define glibcrelease 17%{?dist}
+%define glibcrelease 18%{?dist}
 # Pre-release tarballs are pulled in from git using a command that is
 # effectively:
 #
@@ -2060,6 +2060,15 @@ fi
 %endif
 
 %changelog
+* Fri Oct 06 2017 Carlos O'Donell <carlos@systemhalted.org> - 2.26.90-18
+- Auto-sync with upstream master,
+  commit 1e26d35193efbb29239c710a4c46a64708643320.
+- malloc: Fix tcache leak after thread destruction (swbz#22111)
+- powerpc:  Fix IFUNC for memrchr.
+- aarch64: Optimized implementation of memmove for Qualcomm Falkor
+- Always do locking when iterating over list of streams (swbz#15142)
+- abort: Do not flush stdio streams (swbz#15436)
+
 * Wed Oct 04 2017 Florian Weimer <fweimer@redhat.com> - 2.26.90-17
 - Move nss_compat to the main glibc package (#1400538)
 - Auto-sync with upstream master,
diff --git a/sources b/sources
index f504dce..9e219ef 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (glibc-2.26-513-g11c4f5010c.tar.gz) = 0b11eb37e652161942dd933cda408fc253a20f936be105f62a144e4b939de23021d3e91135f7796709306850d5c93869810deea225b063cc2a51cb7e8f1576e2
+SHA512 (glibc-2.26-538-g1e26d35.tar.gz) = ca64cafbb8a7113eb9de1c823e6c9ce743b3ae6b0ab2651bcd66c8edd22c9595e94f4a86b7fb4d50ff22ad47b4a2dfdc75b2d31718f1ab4b72bc72ff4d887f42
diff --git a/sync-upstream.sh b/sync-upstream.sh
deleted file mode 100755
index 459c153..0000000
--- a/sync-upstream.sh
+++ /dev/null
@@ -1,143 +0,0 @@
-#!/bin/sh
-# Given a git source repo, generate a tarball from the desired branch, modify
-# the spec file and upload it to lookaside cache if the tarball unpacks and
-# gets patched cleanly.
-#
-# Usage:
-#
-#     1. Invoke the script as follows:
-#
-#           ./sync-upstream.sh upstream-repo
-#
-#       where upstream-repo is the path to the synced upstream git repo.
-#
-#    2. Watch the script run.  If it proceeds to building the package, then
-#       everything seems good and you just need to test the build after it
-#       is complete.  If it exits before the build (you'll know if you read
-#       the output of the script) then manual intervention is required to
-#       complete the sync.  This will typically happen when a patch fails
-#       to apply on the new sources.
-#
-# Development branch:
-#
-# * As long as the branch is "master" the repository is treated as
-#   development and synchronization updates are fully automatic.
-#
-# Stable branches:
-#
-# * Once you branch to a stable Fedora release adjust branch.
-#   e.g. release/2.23/master
-#
-# * Set branch_name to the name of the relase
-#   e.g. 2.23
-#
-# * The sync script will automatically stop before commit, push, build
-#   for production branches, so you have to review the results and then
-#   do those steps yourself.
-#
-
-set -e
-
-# We want to sync from master by default.  Change this if you want to sync from
-# another branch.
-branch=master
-# Avoid slashes in branch name.
-branch_name=master
-
-# We can't do anything without an upstream repo
-if [ $# -ne 1 ]; then
-	echo "Usage: $0 <path-to-upstream-repo>" 1>&2
-	exit 1
-fi
-
-upstream=$1
-
-srcdir=$(git --git-dir=$upstream/.git describe $branch)
-cursrc=$(sed -ne 's/^%define glibcsrcdir  \(.*\)/\1/p' glibc.spec)
-
-# Upstream has not moved forward since the last sync.
-# TODO: Some time in the future, we might want to only sync when upstream has
-# advanced more than a certain number of commits, say, 42.
-if [ "$cursrc" = "$srcdir" ]; then
-	echo "+ Already in sync with upstream."
-	exit 0
-fi
-
-# Generate and gzip the tarball from the desired branch of the repository.
-echo "+ Generating tarball."
-git --git-dir="$upstream/.git" archive --prefix="$srcdir/" "$branch" \
-	> "$srcdir.tar"
-gzip -9 "$srcdir.tar"
-echo "+ Created $srcdir.tar.gz"
-
-# Our changelog header
-cldate=$(date +'%a %b %d %Y')
-clname=$(git config --get user.name)
-clemail=$(git config --get user.email | sed 's/@/\\@/')
-
-# Getting our version and release number from the spec file.
-nv=$(perl -ne 's/^%define glibcversion (.+)/printf("%s-", $1)/e;' \
-	  -e 's/^%define glibcrelease ([0-9]+).*/printf("%d\n", $1 + 1)/e;' \
-	  glibc.spec)
-
-# Our changelog entry.
-changelog="* $cldate $clname <$clemail> - $nv\n- Auto-sync with upstream $branch.\n"
-
-# Change the glibcsrcdir variable, bump up the release number and add an extra
-# entry to the changelog.
-echo "+ Updating spec file."
-perl -pi \
-	-e "s/^(%define glibcsrcdir  ).+/\$1$srcdir/;
-	    s/^(%define glibcrelease )(\d+)/print(\$1); print(\$2 + 1);'';/e;
-	    s/^(%changelog)$/\$1\n$changelog/" \
-	glibc.spec
-
-function print_steps {
-	echo "+ (a) Updating sources e.g. fedpkg new-sources $srcdir.tar.gz"
-	echo "+ (b) Committing changes e.g. git commit -a"
-	echo "+ (c) Pushing to fedora e.g. fedpkg push"
-	echo "+ (d) Building fedora branch e.g. fedpkg build"
-}
-
-function prep_failed {
-	# fedpkg prep failed.
-	if [ $? -ne 0 ]; then
-		echo "+ Source prep failed."
-		echo "+ The 'sources' file is unmodified. Manually use $srcdir.tar.gz."
-		echo "+ Check the output in $tmpfile and fix things before:"
-		print_steps
-		false
-	fi
-}
-
-function build_failed {
-	# fedpkg build failed.
-	if [ $? -ne 0 ]; then
-		echo "+ Building the package failed (or was interrupted)."
-		echo "+ Check the koji logs for final status."
-		false
-	fi
-}
-
-echo "+ Testing if fedpkg prep works."
-tmpfile=$(mktemp fedpkg-prep.out-XXXX)
-
-trap prep_failed EXIT
-fedpkg prep > "$tmpfile" 2>&1
-# Remove mess created by fedpkg prep
-rm -f "$tmpfile"
-rm -rf "$srcdir"
-echo "+ Source prep is clean, so we're good to go."
-fedpkg new-sources "$srcdir.tar.gz"
-if [ $branch == "master" ]; then
-	git commit -a -m "Auto-sync with upstream $branch."
-	fedpkg push
-	trap build_failed EXIT
-	fedpkg build
-	echo "+ Done!"
-else
-	echo "+ This is a non-development branch."
-	echo "+ Please review the results of the sync."
-	echo "+ Once reviewed you need to:"
-	print_steps
-fi