diff --git a/fix-global_max_fast-based-on-MIN_CHUNK_SIZE.patch b/fix-global_max_fast-based-on-MIN_CHUNK_SIZE.patch
new file mode 100644
index 0000000000000000000000000000000000000000..9c1ac7b0254b73f5e13396a55c80a77c59f232bb
--- /dev/null
+++ b/fix-global_max_fast-based-on-MIN_CHUNK_SIZE.patch
@@ -0,0 +1,34 @@
+From ff12e0fb91b9072800f031cb21fb2651ee7b6251 Mon Sep 17 00:00:00 2001
+From: DJ Delorie <dj@redhat.com>
+Date: Wed, 30 Oct 2019 18:03:14 -0400
+Subject: [PATCH] Base max_fast on alignment, not width, of bins (Bug 24903)
+
+set_max_fast sets the "impossibly small" value based on,
+eventually, MALLOC_ALIGNMENT.  The comparisons for the smallest
+chunk used is, eventually, MIN_CHUNK_SIZE.  Note that i386
+is the only platform where these are the same, so a smallest
+chunk *would* be put in a no-fastbins fastbin.
+
+This change calculates the "impossibly small" value
+based on MIN_CHUNK_SIZE instead, so that we can know it will
+always be impossibly small.
+---
+ malloc/malloc.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/malloc/malloc.c b/malloc/malloc.c
+index cfddfb75..4832e0b8 100644
+--- a/malloc/malloc.c
++++ b/malloc/malloc.c
+@@ -1624,7 +1624,7 @@ static INTERNAL_SIZE_T global_max_fast;
+ 
+ #define set_max_fast(s) \
+   global_max_fast = (((s) == 0)						      \
+-                     ? SMALLBIN_WIDTH : ((s + SIZE_SZ) & ~MALLOC_ALIGN_MASK))
++                     ? MIN_CHUNK_SIZE / 2 : ((s + SIZE_SZ) & ~MALLOC_ALIGN_MASK))
+ 
+ static inline INTERNAL_SIZE_T
+ get_max_fast (void)
+-- 
+2.33.0
+
diff --git a/glibc.spec b/glibc.spec
index b2b9f56e9f7726d575bd404ac7665a2ff90bbf7b..c7604738889b0456bb935e5ea2dd73aa2182a94b 100644
--- a/glibc.spec
+++ b/glibc.spec
@@ -62,7 +62,7 @@
 ##############################################################################
 Name: 	 	glibc
 Version: 	2.28
-Release: 	114
+Release: 	115
 Summary: 	The GNU libc libraries
 License:	%{all_license}
 URL: 		http://www.gnu.org/software/glibc/
@@ -182,6 +182,7 @@ Patch95: posix-Fix-double-free-after-allocation-failure-in-re.patch
 Patch96: benchtests-Set-float-type-on-threshold-argument.patch
 Patch97: stdio-Fix-aliasing-violation.patch
 Patch98: use_uintptr_t_for_address_diagnostic.patch
+Patch99: fix-global_max_fast-based-on-MIN_CHUNK_SIZE.patch
 
 Provides: ldconfig rtld(GNU_HASH) bundled(gnulib)
 
@@ -1301,6 +1302,9 @@ fi
 %endif
 
 %changelog
+* Mon Oct 20 2025 panzhe <panzhe@kylinos.cn> - 2.28-115
+- malloc: fix global_max_fast based on MIN_CHUNK_SIZE
+
 * Fri Oct 17 2025 panzhe <panzhe@kylinos.cn> - 2.28-114
 - nptl: Use uintptr_t for address diagnostic in nptl/tst-pthread-getattr