poppler: fix CVE-2025-52885

Poppler ia a library for rendering PDF files, and examining or
modifying their structure. A use-after-free (write) vulnerability
has been detected in versions Poppler prior to 25.10.0 within the
StructTreeRoot class. The issue arises from the use of raw pointers
to elements of a `std::vector`, which can lead to dangling pointers
when the vector is resized. The vulnerability stems from the way that
refToParentMap stores references to `std::vector` elements using raw
pointers. These pointers may become invalid when the vector is resized.
This vulnerability is a common security problem involving the use of
raw pointers to `std::vectors`. Internally, `std::vector `stores its
elements in a dynamically allocated array. When the array reaches its
capacity and a new element is added, the vector reallocates a larger
block of memory and moves all the existing elements to the new location.
At this point if any pointers to elements are stored before a resize
occurs, they become dangling pointers once the reallocation happens.
Version 25.10.0 contains a patch for the issue.

Reference:
https://nvd.nist.gov/vuln/detail/CVE-2025-52885

Upstream patch:
https://gitlab.freedesktop.org/poppler/poppler/-/commit/4ce27cc826bf90cc8dbbd8a8c87bd913cccd7ec0

Signed-off-by: Yogita Urade <yogita.urade@windriver.com>
Signed-off-by: Gyorgy Sarvari <skandigraun@gmail.com>

2 files changed, 31 insertions, 0 deletions

diff --git a/meta-oe/recipes-support/poppler/poppler/CVE-2025-52885.patch b/meta-oe/recipes-support/poppler/poppler/CVE-2025-52885.patch
new file mode 100644
index 0000000000..a48b2c01a6
--- /dev/null
+++ b/meta-oe/recipes-support/poppler/poppler/CVE-2025-52885.patch
@@ -0,0 +1,30 @@
+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
+
+CVE: CVE-2025-52885
+Upstream-Status: Backport [https://gitlab.freedesktop.org/poppler/poppler/-/commit/4ce27cc826bf90cc8dbbd8a8c87bd913cccd7ec0]
+
+Signed-off-by: Yogita Urade <yogita.urade@windriver.com>
+---
+ poppler/StructTreeRoot.cc | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/poppler/StructTreeRoot.cc b/poppler/StructTreeRoot.cc
+index 47adac9..10db9aa 100644
+--- a/poppler/StructTreeRoot.cc
++++ b/poppler/StructTreeRoot.cc
+@@ -137,6 +137,10 @@ 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()) {
+--
+2.40.0
diff --git a/meta-oe/recipes-support/poppler/poppler_22.04.0.bb b/meta-oe/recipes-support/poppler/poppler_22.04.0.bb
index 0c4efab918..3861bbbb2b 100644
--- a/meta-oe/recipes-support/poppler/poppler_22.04.0.bb
+++ b/meta-oe/recipes-support/poppler/poppler_22.04.0.bb
@@ -20,6 +20,7 @@ SRC_URI = "http://poppler.freedesktop.org/${BP}.tar.xz \
            file://CVE-2025-52886-0003.patch \
            file://CVE-2025-52886-0004.patch \
            file://CVE-2025-43718.patch \
+           file://CVE-2025-52885.patch \
            "
 SRC_URI[sha256sum] = "813fb4b90e7bda63df53205c548602bae728887a60f4048aae4dbd9b1927deff"