diff --git a/backport-Fix-memory-leak-issue-in-read_Subid_range.patch b/backport-Fix-memory-leak-issue-in-read_Subid_range.patch
new file mode 100644
index 0000000000000000000000000000000000000000..ca89744d07a0b4b47b7a238f26130ba642d4a510
--- /dev/null
+++ b/backport-Fix-memory-leak-issue-in-read_Subid_range.patch
@@ -0,0 +1,25 @@
+From 47344ed614cb6adfbf9e0eec7f7c18a672e1057b Mon Sep 17 00:00:00 2001
+From: fortunate-lee <lijian01@kylinos.cn>
+Date: Thu, 23 Oct 2025 15:01:31 +0800
+Subject: [PATCH] Fix memory leak issue in read_Subid_range()
+
+Signed-off-by: fortunate-lee <lijian01@kylinos.cn>
+---
+ sys-utils/unshare.c | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/sys-utils/unshare.c b/sys-utils/unshare.c
+index 3ff4137..157aeac 100644
+--- a/sys-utils/unshare.c
++++ b/sys-utils/unshare.c
+@@ -463,6 +463,7 @@ static struct map_range *read_subid_range(char *filename, uid_t uid)
+ 		fclose(idmap);
+ 		free(pw);
+ 		free(pwbuf);
++		free(line);
+ 
+ 		return map;
+ 	}
+-- 
+2.33.0
+
diff --git a/util-linux.spec b/util-linux.spec
index 938df267d44e8844cb42331bf86086d1348284e3..d11f2f2d96027adf0895874fe1b740c2a3ae69d6 100644
--- a/util-linux.spec
+++ b/util-linux.spec
@@ -3,7 +3,7 @@
 
 Name:           util-linux
 Version:        2.39.1
-Release:        30
+Release:        31
 Summary:        A random collection of Linux utilities
 License:        GPLv2 and GPLv2+ and LGPLv2+ and BSD with advertising and Public Domain
 URL:            https://git.kernel.org/pub/scm/utils/util-linux/util-linux.git
@@ -134,6 +134,7 @@ Patch9003:      add-new-gmo-file.patch
 Patch9004:      mount-fix-use-option-owner-mount-failed.patch
 Patch9005:      Add-new-cpu-model-name-of-arm-Kunpeng.patch
 Patch9006:      fix-audit-arch.h-support-sw64.patch
+Patch9007:      backport-Fix-memory-leak-issue-in-read_Subid_range.patch
 
 BuildRequires:  audit-libs-devel >= 1.0.6 gettext-devel libselinux-devel ncurses-devel pam-devel zlib-devel popt-devel
 BuildRequires:  libutempter-devel systemd-devel systemd libuser-devel libcap-ng-devel python3-devel gcc autoconf automake
@@ -492,6 +493,12 @@ fi
 %endif
 
 %changelog
+* Wed Nov 12 2025 lijian <lijian01@kylinos.cn> - 2.39.1-31
+- Type:bugfix
+- CVE:NA
+- SUG:NA
+- DESC: Fix memory leak issue in read_Subid_range
+
 * Mon Oct 20 2025 yanglongkang <yanglongkang@h-partners.com> - 2.39.1-30
 - backport community patches