diff --git a/glibc.spec b/glibc.spec
index b045364115bdf69bed0fa6ff6f826e56290a4a95..d504bb5a146df4100129ca4462abeb70fd669c3c 100644
--- a/glibc.spec
+++ b/glibc.spec
@@ -67,7 +67,7 @@
 ##############################################################################
 Name: 	 	glibc
 Version: 	2.38
-Release: 	75
+Release: 	76
 Summary: 	The GNU libc libraries
 License:	%{all_license}
 URL: 		http://www.gnu.org/software/glibc/
@@ -367,6 +367,7 @@ Patch277: loongarch-Drop-__GI_XXX-for-strcpy-stpcpy-IFUNC-impl.patch
 Patch278: x86-64-Don-t-use-SSE-resolvers-for-ISA-level-3-or-ab.patch
 Patch279: x86-64-Simplify-minimum-ISA-check-ifdef-conditional-.patch
 Patch280: x86-Skip-XSAVE-state-size-reset-if-ISA-level-require.patch
+Patch281: x86-fix-wmemset-ifunc-stray-bug-33542.patch
 
 #openEuler patch list
 Patch9000: turn-default-value-of-x86_rep_stosb_threshold_form_2K_to_1M.patch
@@ -1602,6 +1603,9 @@ fi
 %endif
 
 %changelog
+* Wed Nov 05 2025 Qingqing Li <liqingqing3@huawei.com> - 2.38-76
+- x86: fix wmemset ifunc stray '!' (bug 33542)
+
 * Tue Nov 04 2025 jinshuaiyu <jinshuaiyu@kylinos.cn> - 2.38-75
 - Backport patches from glibc upstream 2.38 branch
 - Free dynarray buffer after parsing nsswitch.conf
diff --git a/x86-fix-wmemset-ifunc-stray-bug-33542.patch b/x86-fix-wmemset-ifunc-stray-bug-33542.patch
new file mode 100644
index 0000000000000000000000000000000000000000..118cce14888a27383593fe07d0884ffe074baa11
--- /dev/null
+++ b/x86-fix-wmemset-ifunc-stray-bug-33542.patch
@@ -0,0 +1,52 @@
+From 96f1804a0d968ec361211fb63486e672bf4f363b Mon Sep 17 00:00:00 2001
+From: Jiamei Xie <xiejiamei@hygon.cn>
+Date: Tue, 14 Oct 2025 20:14:11 +0800
+Subject: [PATCH] x86: fix wmemset ifunc stray '!' (bug 33542)
+
+The ifunc selector for wmemset had a stray '!' in the
+X86_ISA_CPU_FEATURES_ARCH_P(...) check:
+
+  if (X86_ISA_CPU_FEATURE_USABLE_P (cpu_features, AVX2)
+      && X86_ISA_CPU_FEATURES_ARCH_P (cpu_features,
+                                      AVX_Fast_Unaligned_Load, !))
+
+This effectively negated the predicate and caused the AVX2/AVX512
+paths to be skipped, making the dispatcher fall back to the SSE2
+implementation even on CPUs where AVX2/AVX512 are available. The
+regression leads to noticeable throughput loss for wmemset.
+
+Remove the stray '!' so the AVX_Fast_Unaligned_Load capability is
+tested as intended and the correct AVX2/EVEX variants are selected.
+
+Impact:
+- On AVX2/AVX512-capable x86_64, wmemset no longer incorrectly
+  falls back to SSE2; perf now shows __wmemset_evex/avx2 variants.
+
+Testing:
+- benchtests/bench-wmemset shows improved bandwidth across sizes.
+- perf confirm the selected symbol is no longer SSE2.
+
+Signed-off-by: xiejiamei <xiejiamei@hygon.com>
+Signed-off-by: Li jing <lijing@hygon.cn>
+Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
+(cherry picked from commit 4d86b6cdd8132e0410347e07262239750f86dfb4)
+---
+ sysdeps/x86_64/multiarch/ifunc-wmemset.h | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/sysdeps/x86_64/multiarch/ifunc-wmemset.h b/sysdeps/x86_64/multiarch/ifunc-wmemset.h
+index 1fbbd3d68e..7f68fabfc8 100644
+--- a/sysdeps/x86_64/multiarch/ifunc-wmemset.h
++++ b/sysdeps/x86_64/multiarch/ifunc-wmemset.h
+@@ -35,7 +35,7 @@ IFUNC_SELECTOR (void)
+ 
+   if (X86_ISA_CPU_FEATURE_USABLE_P (cpu_features, AVX2)
+       && X86_ISA_CPU_FEATURES_ARCH_P (cpu_features,
+-				      AVX_Fast_Unaligned_Load, !))
++				      AVX_Fast_Unaligned_Load,))
+     {
+       if (X86_ISA_CPU_FEATURE_USABLE_P (cpu_features, AVX512VL))
+ 	{
+-- 
+2.27.0
+