[AutoPR- Security] Patch glib for CVE-2026-1489, CVE-2026-0988 [MEDIUM] (#15731)

Co-authored-by: jykanase <v-jykanase@microsoft.com>

Author: azurelinux-security

SPECS/glib/CVE-2026-0988.patch

@@ -0,0 +1,59 @@
+From 56ec31fed99ea19c123e5266a27f4ea03d25ae15 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
+Signed-off-by: Azure Linux Security Servicing Account <azurelinux-security@microsoft.com>
+Upstream-reference: https://gitlab.gnome.org/GNOME/glib/-/commit/c5766cff61ffce0b8e787eae09908ac348338e5f.patch
+---
+ 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 d9f150d..04c4d9f 100644
+--- a/gio/gbufferedinputstream.c
++++ b/gio/gbufferedinputstream.c
+@@ -588,7 +588,7 @@ 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 ee084b3..39b4daf 100644
+--- a/gio/tests/buffered-input-stream.c
++++ b/gio/tests/buffered-input-stream.c
+@@ -58,6 +58,16 @@ 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);
+ }
+-- 
+2.45.4
+