diff --git a/glibc.spec b/glibc.spec
index 59fd960..e343bfd 100644
--- a/glibc.spec
+++ b/glibc.spec
@@ -1,4 +1,4 @@
-%define glibcsrcdir glibc-2.34.9000-42-gb37b75d269
+%define glibcsrcdir glibc-2.34.9000-59-g9926f6e2ee
 %define glibcversion 2.34.9000
 # Pre-release tarballs are pulled in from git using a command that is
 # effectively:
@@ -151,7 +151,7 @@ end \
 Summary: The GNU libc libraries
 Name: glibc
 Version: %{glibcversion}
-Release: 3%{?dist}
+Release: 4%{?dist}
 
 # In general, GPLv2+ is used by programs, LGPLv2+ is used for
 # libraries.
@@ -2261,6 +2261,27 @@ fi
 %files -f compat-libpthread-nonshared.filelist -n compat-libpthread-nonshared
 
 %changelog
+* Wed Aug 25 2021 Arjun Shankar <arjun@redhat.com> - 2.34.9000-4
+- Auto-sync with upstream branch master,
+  commit 9926f6e2eeb374cf729d4bb3f092dd4b36a8f861:
+- elf: Skip tst-auditlogmod-* if the linker doesn't support --depaudit [BZ #28151]
+- powerpc: Use --no-tls-get-addr-optimize in test only if the linker supports it
+- x86-64: Remove assembler AVX512DQ check
+- x86-64: Remove compiler -mavx512f check
+- Use __executable_start as the lowest address for profiling [BZ #28153]
+- hurd: Fix errlist error mapping
+- hurd: Remove old test-err_np.c file
+- Fix iconv build with GCC mainline
+- rtld: copy terminating null in tunables_strdup (bug 28256)
+- mtrace: Fix output with PIE and ASLR [BZ #22716]
+- x86-64: Optimize load of all bits set into ZMM register [BZ #28252]
+- Update string/test-memmove.c to cover 16KB copy
+- elf: Fix missing colon in LD_SHOW_AUXV output [BZ #28253]
+- x86: fix Autoconf caching of instruction support checks [BZ #27991]
+- arm: Simplify elf_machine_{load_address,dynamic}
+- riscv: Drop reliance on _GLOBAL_OFFSET_TABLE_[0]
+- Remove sysdeps/*/tls-macros.h
+
 * Tue Aug 24 2021 Siddhesh Poyarekar <siddhesh@redhat.com> - 2.34.9000-3
 - Disable dependencies and linking for libc_malloc_debug.so (#1985048).
 
diff --git a/sources b/sources
index 4f7803b..f7fc76f 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (glibc-2.34.9000-42-gb37b75d269.tar.xz) = 397c96db5ca0b1eadc5a2c5fbf8eea6532b24b329da0fcbba2d6b878273c1aa5c67803db13bbfc92642071b5a2d07f685297b43053ef27ae3c6f4ca70d749cc3
+SHA512 (glibc-2.34.9000-59-g9926f6e2ee.tar.xz) = 3ee2f45be1630d3e7db2662bdc6fc93cbe3309506decfbad99d2a9d02fb5784d48c74485042ce50ced667a6f9c093d789f08ad30a87a6fae64d2b82c555bbc62