diff --git a/backport-CVE-2025-52885.patch b/backport-CVE-2025-52885.patch
new file mode 100644
index 0000000000000000000000000000000000000000..a89ae0040bf8bd4e5407e038069acdbb2fdbd9fd
--- /dev/null
+++ b/backport-CVE-2025-52885.patch
@@ -0,0 +1,29 @@
+From 4ce27cc826bf90cc8dbbd8a8c87bd913cccd7ec0 Mon Sep 17 00:00:00 2001
+From: Kevin Backhouse <kevinbackhouse@github.com>
+Date: Wed, 3 Sep 2025 14:36:54 +0100
+Subject: [PATCH] Check for duplicate entries
+
+Reference:https://gitlab.freedesktop.org/poppler/poppler/-/commit/4ce27cc826bf90cc8dbbd8a8c87bd913cccd7ec0
+Conflict:Adapt context
+---
+ poppler/StructTreeRoot.cc | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/poppler/StructTreeRoot.cc b/poppler/StructTreeRoot.cc
+index 0c28e5e..37f62be 100644
+--- a/poppler/StructTreeRoot.cc
++++ b/poppler/StructTreeRoot.cc
+@@ -140,6 +140,10 @@ void StructTreeRoot::parseNumberTreeNode(Dict *node)
+ 	}
+ 	int keyVal = key.getInt();
+ 	std::vector<Parent>& vec = parentTree[keyVal];
++	if (!vec.empty()) {
++	    error(errSyntaxError, -1, "Nums item at position {0:d} is a duplicate entry for key {1:d}", i, keyVal);
++	    continue;
++	}
+ 
+ 	Object valueArray = nums.arrayGet(i + 1);
+ 	if (valueArray.isArray()) {
+-- 
+2.43.0
+
diff --git a/poppler.spec b/poppler.spec
index 4d54ee56e8b75dc97eb7883ebbb3bc049c2c5917..0d1439d4b6d7035fd64d2239f4371a5e748964f5 100644
--- a/poppler.spec
+++ b/poppler.spec
@@ -4,7 +4,7 @@
 Summary:        PDF rendering library
 Name:           poppler
 Version:        0.90.0
-Release:        14
+Release:        15
 License:        (GPLv2 or GPLv3) and GPLv2+ and LGPLv2+ and MIT
 URL:            http://poppler.freedesktop.org/
 Source0:        http://poppler.freedesktop.org/poppler-%{version}.tar.xz
@@ -31,6 +31,7 @@ Patch6013:      backport-CVE-2025-32365.patch
 Patch6014:      backport-CVE-2025-52886.patch
 Patch6015:      backport-CVE-2025-50420.patch
 Patch6016:      backport-CVE-2025-43718.patch
+Patch6017:      backport-CVE-2025-52885.patch
 
 BuildRequires:  cmake
 BuildRequires:  gcc-c++
@@ -231,6 +232,9 @@ test "$(pkg-config --modversion poppler-splash)" = "%{version}"
 %{_mandir}/man1/*
 
 %changelog
+* Sat Oct 11 2025 lingsheng <lingsheng1@h-partners.com> - 0.90.0-15
+- fix CVE-2025-52885
+
 * Thu Oct 09 2025 lingsheng <lingsheng1@h-partners.com> - 0.90.0-14
 - fix CVE-2025-43718