diff --git a/glibc.spec b/glibc.spec
index 242dec4..0003e2d 100644
--- a/glibc.spec
+++ b/glibc.spec
@@ -1,4 +1,4 @@
-%global glibcsrcdir glibc-2.35.9000-657-g8ee2c043cf
+%global glibcsrcdir glibc-2.35.9000-666-g7519dee356
 %global glibcversion 2.35.9000
 # Pre-release tarballs are pulled in from git using a command that is
 # effectively:
@@ -152,7 +152,7 @@ end}
 Summary: The GNU libc libraries
 Name: glibc
 Version: %{glibcversion}
-Release: 26%{?dist}
+Release: 27%{?dist}
 
 # In general, GPLv2+ is used by programs, LGPLv2+ is used for
 # libraries.
@@ -2177,6 +2177,19 @@ update_gconv_modules_cache ()
 %files -f compat-libpthread-nonshared.filelist -n compat-libpthread-nonshared
 
 %changelog
+* Tue Jul 05 2022 Florian Weimer <fweimer@redhat.com> - 2.35.9000-27
+- Auto-sync with upstream branch master,
+  commit 7519dee356a0ab21c8990e59ed05dd48a4e573a0:
+- malloc: Simplify checked_request2size interface
+- stdlib: Simplify buffer management in canonicalize
+- localedef: Support building for older C standards
+- de_DE: Convert to UTF-8
+- locale: localdef input files are now encoded in UTF-8
+- locale: Introduce translate_unicode_codepoint into linereader.c
+- locale: Fix signed char bug in lr_getc
+- locale: Turn ADDC and ADDS into functions in linereader.c
+- libc-symbols.h: remove unused macros
+
 * Mon Jul 04 2022 Carlos O'Donell <carlos@redhat.com> - 2.35.9000-26
 - Auto-sync with upstream branch master,
   commit 8ee2c043cfb35c48b45c7c5aed4022a8a7352bdc.
diff --git a/sources b/sources
index 7c2e0ae..f345250 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (glibc-2.35.9000-657-g8ee2c043cf.tar.xz) = 461c8388714998d9dac8606b0b55f3f506963b00894401e007a3ed81b19a6b723231c65b48a37a40a1923481069e0565c91a359afeaf46d2b7de94b911488b40
+SHA512 (glibc-2.35.9000-666-g7519dee356.tar.xz) = f1c869d42d8743b7446bf8106fa640cf9a65dd55a04cb3321b428d94005a7ed914d200503f672ad18e3ebb4c919ffd10c77b039fb93674e5de609f4567ca6841