diff --git a/backport-cksum-improve-problematic_chars-function.patch b/backport-cksum-improve-problematic_chars-function.patch
new file mode 100644
index 0000000000000000000000000000000000000000..e3031d51fbaa4cb238f70c13196f987612c0188b
--- /dev/null
+++ b/backport-cksum-improve-problematic_chars-function.patch
@@ -0,0 +1,28 @@
+From c0e7e4a1d41049bbf38cf902d13746b1ab5b1e38 Mon Sep 17 00:00:00 2001
+From: Jim Meyering <meyering@meta.com>
+Date: Thu, 4 Sep 2025 18:16:16 +0800
+Subject: [PATCH] cksum: improve problematic_chars function
+
+* src/digest.c (problematic_chars): Implement using strcspn,
+and traversing S only once, rather than once per escaped byte.
+---
+ src/digest.c | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/src/digest.c b/src/digest.c
+index 123eda7..4f58a93 100644
+--- a/src/digest.c
++++ b/src/digest.c
+@@ -549,7 +549,8 @@ or equivalent standalone program.\
+ static bool
+ problematic_chars (char const *s)
+ {
+-  return strchr (s, '\\') || strchr (s, '\n') || strchr (s, '\r');
++  size_t length = strcspn (s, "\\\n\r");
++  return s[length] != '\0';
+ }
+ 
+ #define ISWHITE(c) ((c) == ' ' || (c) == '\t')
+-- 
+2.43.0
+
diff --git a/coreutils.spec b/coreutils.spec
index ee972182a41920d4ab487533f6d8c73743b2cd43..7e05454f3341267f674f78e486f6ac78b7e4fee1 100644
--- a/coreutils.spec
+++ b/coreutils.spec
@@ -1,6 +1,6 @@
 Name:       coreutils
 Version:    9.0
-Release:    22
+Release:    23
 License:    GPLv3+
 Summary:    A set of basic GNU tools commonly used in shell scripts
 Url:        https://www.gnu.org/software/coreutils/
@@ -68,6 +68,7 @@ Patch53:   backport-dd-fix-error-detection-with-nocache-flag.patch
 Patch54:   backport-tests-dd-ensure-posix_fadvise-errors-are-handled.patch
 Patch55:   backport-timeout-ensure-infinitesimal-timeouts-timeout-quickl.patch
 Patch56:   backport-cksum-escape-filenames-with-a-leading-in-check-statu.patch
+Patch57:   backport-cksum-improve-problematic_chars-function.patch
 
 Patch9001: coreutils-9.0-sw.patch
 
@@ -196,6 +197,9 @@ fi
 %{_mandir}/man*/*
 
 %changelog
+* Thu Sep 04 2025 cenhuilin <cenhuilin@kylinos.cn> - 9.0-23
+- cksum: improve problematic_chars function
+
 * Thu Aug 21 2025 cenhuilin <cenhuilin@kylinos.cn> - 9.0-22
 - cksum: escape filenames with a leading '\' in --check status