diff --git a/backport-Free-dynarray-buffer-after-parsing-nsswitch.conf.patch b/backport-Free-dynarray-buffer-after-parsing-nsswitch.conf.patch
new file mode 100644
index 0000000000000000000000000000000000000000..d960131d069970ab969608d017519a198877a8b4
--- /dev/null
+++ b/backport-Free-dynarray-buffer-after-parsing-nsswitch.conf.patch
@@ -0,0 +1,37 @@
+From af90dc572ad232d05b667c4ce218d499f066b7bc Mon Sep 17 00:00:00 2001
+From: DJ Delorie <dj@redhat.com>
+Date: Fri, 30 May 2025 21:04:37 -0400
+Subject: [PATCH] nss: free dynarray buffer after parsing nsswitch.conf
+
+Resolves: swbz 31791
+
+Reviewed-by: Collin Funk <collin.funk1@gmail.com>
+---
+ nss/nss_action_parse.c | 5 ++++-
+ 1 file changed, 4 insertions(+), 1 deletion(-)
+
+diff --git a/nss/nss_action_parse.c b/nss/nss_action_parse.c
+index 2b67a8a2a0..ee3aadf312 100644
+--- a/nss/nss_action_parse.c
++++ b/nss/nss_action_parse.c
+@@ -168,13 +168,16 @@ nss_action_list
+   action_list_init (&list);
+   if (nss_action_parse (line, &list))
+     {
++      nss_action_list retval;
+       size_t size;
+       struct nss_action null_service
+         = { .module = NULL, };
+ 
+       action_list_add (&list, null_service);
+       size = action_list_size (&list);
+-      return __nss_action_allocate (action_list_begin (&list), size);
++      retval = __nss_action_allocate (action_list_begin (&list), size);
++      action_list_free (&list);
++      return retval;
+     }
+   else if (action_list_has_failed (&list))
+     {
+-- 
+2.43.7
+
diff --git a/glibc.spec b/glibc.spec
index a331490a70cce7a42a3be273d5b5a4a678a36f9a..b045364115bdf69bed0fa6ff6f826e56290a4a95 100644
--- a/glibc.spec
+++ b/glibc.spec
@@ -67,7 +67,7 @@
 ##############################################################################
 Name: 	 	glibc
 Version: 	2.38
-Release: 	74
+Release: 	75
 Summary: 	The GNU libc libraries
 License:	%{all_license}
 URL: 		http://www.gnu.org/software/glibc/
@@ -359,13 +359,14 @@ Patch269: i386-Update-___tls_get_addr-to-preserve-vector-regis.patch
 Patch270: x86-64-Add-GLIBC_ABI_GNU2_TLS-version-BZ-33129.patch
 Patch271: i386-Also-add-GLIBC_ABI_GNU2_TLS-version-BZ-33129.patch
 Patch272: i386-Add-GLIBC_ABI_GNU_TLS-version-BZ-33221.patch
-Patch273: LoongArch-Update-ulps.patch
-Patch274: Add-HWCAP_LOONGARCH_LSPW-from-Linux-6.12-to-bits-hwc.patch
-Patch275: loongarch-Provide-stpcpy-in-stpcpy-aligned.S-for-rtl.patch
-Patch276: loongarch-Drop-__GI_XXX-for-strcpy-stpcpy-IFUNC-impl.patch
-Patch277: x86-64-Don-t-use-SSE-resolvers-for-ISA-level-3-or-ab.patch
-Patch278: x86-64-Simplify-minimum-ISA-check-ifdef-conditional-.patch
-Patch279: x86-Skip-XSAVE-state-size-reset-if-ISA-level-require.patch
+Patch273: backport-Free-dynarray-buffer-after-parsing-nsswitch.conf.patch
+Patch274: LoongArch-Update-ulps.patch
+Patch275: Add-HWCAP_LOONGARCH_LSPW-from-Linux-6.12-to-bits-hwc.patch
+Patch276: loongarch-Provide-stpcpy-in-stpcpy-aligned.S-for-rtl.patch
+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
 
 #openEuler patch list
 Patch9000: turn-default-value-of-x86_rep_stosb_threshold_form_2K_to_1M.patch
@@ -1601,6 +1602,10 @@ fi
 %endif
 
 %changelog
+* 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
+
 * Mon Nov 03 2025 Qingqing Li <liqingqing3@huawei.com> - 2.38-74
 - x86: Skip XSAVE state size reset if ISA level requires XSAVE
 - x86-64: Simplify minimum ISA check ifdef conditional with if