gdk-pixbuf: fix CVE-2025-7345

A flaw exists in gdk‑pixbuf within the gdk_pixbuf__jpeg_image_load_increment function
(io-jpeg.c) and in glib’s g_base64_encode_step (glib/gbase64.c). When processing
maliciously crafted JPEG images, a heap buffer overflow can occur during Base64 encoding,
allowing out-of-bounds reads from heap memory, potentially causing application crashes or
arbitrary code execution.

(From OE-Core rev: 78a52a7feb995b4ab4f4df6b16feaac60f6ad59b)

Signed-off-by: Archana Polampalli <archana.polampalli@windriver.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

meta/recipes-gnome/gdk-pixbuf/gdk-pixbuf/CVE-2025-7345.patch

@@ -0,0 +1,55 @@
+From 4af78023ce7d3b5e3cec422a59bb4f48fa4f5886 Mon Sep 17 00:00:00 2001
+From: Matthias Clasen <mclasen@redhat.com>
+Date: Fri, 11 Jul 2025 11:02:05 -0400
+Subject: [PATCH] jpeg: Be more careful with chunked icc data
+
+We we inadvertendly trusting the sequence numbers not to lie.
+If they do we would report a larger data size than we actually
+allocated, leading to out of bounds memory access in base64
+encoding later on.
+
+This has been assigned CVE-2025-7345.
+
+Fixes: #249
+
+CVE: CVE-2025-7345
+
+Upstream-Status: Backport [https://gitlab.gnome.org/GNOME/gdk-pixbuf/-/commit/4af78023ce7d3b5e3cec422a59bb4f48fa4f5886]
+
+Signed-off-by: Archana Polampalli <archana.polampalli@windriver.com>
+---
+ gdk-pixbuf/io-jpeg.c | 8 ++++++--
+ 1 file changed, 6 insertions(+), 2 deletions(-)
+
+diff --git a/gdk-pixbuf/io-jpeg.c b/gdk-pixbuf/io-jpeg.c
+index 3841fc0..9ee1d21 100644
+--- a/gdk-pixbuf/io-jpeg.c
++++ b/gdk-pixbuf/io-jpeg.c
+@@ -356,6 +356,7 @@ jpeg_parse_exif_app2_segment (JpegExifContext *context, jpeg_saved_marker_ptr ma
+		context->icc_profile = g_new (gchar, chunk_size);
+		/* copy the segment data to the profile space */
+		memcpy (context->icc_profile, marker->data + 14, chunk_size);
++                ret = TRUE;
+		goto out;
+	}
+
+@@ -377,12 +378,15 @@ jpeg_parse_exif_app2_segment (JpegExifContext *context, jpeg_saved_marker_ptr ma
+	/* copy the segment data to the profile space */
+	memcpy (context->icc_profile + offset, marker->data + 14, chunk_size);
+
+-	/* it's now this big plus the new data we've just copied */
+-	context->icc_profile_size += chunk_size;
++        context->icc_profile_size = MAX (context->icc_profile_size, offset + chunk_size);
+
+	/* success */
+	ret = TRUE;
+ out:
++        if (!ret) {
++                g_free (context->icc_profile);
++                context->icc_profile = NULL;
++        }
+	return ret;
+ }
+
+--
+2.40.0

meta/recipes-gnome/gdk-pixbuf/gdk-pixbuf_2.42.12.bb

@@ -20,6 +20,7 @@ SRC_URI = "${GNOME_MIRROR}/${BPN}/${MAJ_VER}/${BPN}-${PV}.tar.xz \
            file://run-ptest \
            file://fatal-loader.patch \
            file://0001-meson.build-allow-a-subset-of-tests-in-cross-compile.patch \
+           file://CVE-2025-7345.patch \
            "
 
 SRC_URI[sha256sum] = "b9505b3445b9a7e48ced34760c3bcb73e966df3ac94c95a148cb669ab748e3c7"