glib-2.0: patch CVE-2026-0988

Pick relevant commit from [2] linked from [1].

[1] https://gitlab.gnome.org/GNOME/glib/-/issues/3851
[2] https://gitlab.gnome.org/GNOME/glib/-/merge_requests/4944

Signed-off-by: Peter Marko <peter.marko@siemens.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>

diff --git a/meta/recipes-core/glib-2.0/files/CVE-2026-0988.patch b/meta/recipes-core/glib-2.0/files/CVE-2026-0988.patch
new file mode 100644 (file)
index 0000000..daf8622
--- /dev/null
+++ b/meta/recipes-core/glib-2.0/files/CVE-2026-0988.patch
@@ -0,0 +1,58 @@
+From c5766cff61ffce0b8e787eae09908ac348338e5f Mon Sep 17 00:00:00 2001
+From: Philip Withnall <pwithnall@gnome.org>
+Date: Thu, 18 Dec 2025 23:12:18 +0000
+Subject: [PATCH] gbufferedinputstream: Fix a potential integer overflow in
+ peek()
+
+If the caller provides `offset` and `count` arguments which overflow,
+their sum will overflow and could lead to `memcpy()` reading out more
+memory than expected.
+
+Spotted by Codean Labs.
+
+Signed-off-by: Philip Withnall <pwithnall@gnome.org>
+
+Fixes: #3851
+
+CVE: CVE-2026-0988
+Upstream-Status: Backport [https://gitlab.gnome.org/GNOME/glib/-/commit/c5766cff61ffce0b8e787eae09908ac348338e5f]
+Signed-off-by: Peter Marko <peter.marko@siemens.com>
+---
+ gio/gbufferedinputstream.c        |  2 +-
+ gio/tests/buffered-input-stream.c | 10 ++++++++++
+ 2 files changed, 11 insertions(+), 1 deletion(-)
+
+diff --git a/gio/gbufferedinputstream.c b/gio/gbufferedinputstream.c
+index 9e6bacc62..56d656be0 100644
+--- a/gio/gbufferedinputstream.c
++++ b/gio/gbufferedinputstream.c
+@@ -590,7 +590,7 @@ g_buffered_input_stream_peek (GBufferedInputStream *stream,
+ 
+   available = g_buffered_input_stream_get_available (stream);
+ 
+-  if (offset > available)
++  if (offset > available || offset > G_MAXSIZE - count)
+     return 0;
+ 
+   end = MIN (offset + count, available);
+diff --git a/gio/tests/buffered-input-stream.c b/gio/tests/buffered-input-stream.c
+index a1af4eeff..2b2a0d9aa 100644
+--- a/gio/tests/buffered-input-stream.c
++++ b/gio/tests/buffered-input-stream.c
+@@ -60,6 +60,16 @@ test_peek (void)
+   g_assert_cmpint (npeek, ==, 0);
+   g_free (buffer);
+ 
++  buffer = g_new0 (char, 64);
++  npeek = g_buffered_input_stream_peek (G_BUFFERED_INPUT_STREAM (in), buffer, 8, 0);
++  g_assert_cmpint (npeek, ==, 0);
++  g_free (buffer);
++
++  buffer = g_new0 (char, 64);
++  npeek = g_buffered_input_stream_peek (G_BUFFERED_INPUT_STREAM (in), buffer, 5, G_MAXSIZE);
++  g_assert_cmpint (npeek, ==, 0);
++  g_free (buffer);
++
+   g_object_unref (in);
+   g_object_unref (base);
+ }

diff --git a/meta/recipes-core/glib-2.0/glib.inc b/meta/recipes-core/glib-2.0/glib.inc
index bd87d9c601baf7490634ee1e67b5c03165d12af6..2e15cc7675b115010d63167d194cd5c04ee67c08 100644 (file)
--- a/meta/recipes-core/glib-2.0/glib.inc
+++ b/meta/recipes-core/glib-2.0/glib.inc
@@ -231,6 +231,7 @@ SRC_URI += "\
            file://0001-gio-tests-resources.c-comment-out-a-build-host-only-.patch \
            file://0010-Do-not-hardcode-python-path-into-various-tools.patch \
            file://skip-timeout.patch \
+           file://CVE-2026-0988.patch \
            "
 SRC_URI:append:class-native = " file://relocate-modules.patch \
                                 file://0001-meson.build-do-not-enable-pidfd-features-on-native-g.patch \