glib-2.0: fix CVE-2026-58014

This patch applies the upstream 2.88.1 backport for
CVE-2026-58014. The upstream fix commit is referenced in [1],
and the public CVE advisory is referenced in [2].

[1] https://gitlab.gnome.org/GNOME/glib/-/commit/94ecb5b44a1cae09f481dd5e693832f129948893
[2] https://nvd.nist.gov/vuln/detail/CVE-2026-58014

(From OE-Core rev: cb3cbcb16363f6c351492d19e240c0a02f073749)

Signed-off-by: Deepak Rathore <deeratho@cisco.com>
Signed-off-by: Yoann Congal <yoann.congal@smile.fr>
Signed-off-by: Paul Barker <paul@pbarker.dev>

meta/recipes-core/glib-2.0/glib-2.0/CVE-2026-58014.patch

@@ -0,0 +1,106 @@
+From ba0478c206bc04542df774343c6c85f77df49f6e Mon Sep 17 00:00:00 2001
+From: Philip Withnall <pwithnall@gnome.org>
+Date: Sat, 11 Apr 2026 14:42:57 +0100
+Subject: [PATCH] gkeyfile: Fix a one-byte heap under-read with
+ g_key_file_get_locale_string_list()
+
+If this method was called on a key file key which has an empty value,
+`len == 0` and this leads to a one-byte under-read off the start of the
+key file buffer.
+
+Spotted by linhlhq as #YWH-PGM9867-200. The suggested fix is theirs, and
+the unit test is adapted from their report. I added the fuzzing test.
+
+Fixes: #3930
+
+CVE: CVE-2026-58014
+Upstream-Status: Backport [https://gitlab.gnome.org/GNOME/glib/-/commit/94ecb5b44a1cae09f481dd5e693832f129948893]
+
+Signed-off-by: Philip Withnall <pwithnall@gnome.org>
+(cherry picked from commit 94ecb5b44a1cae09f481dd5e693832f129948893)
+Signed-off-by: Deepak Rathore <deeratho@cisco.com>
+---
+ fuzzing/fuzz_key.c   |  9 +++++++++
+ glib/gkeyfile.c      |  2 +-
+ glib/tests/keyfile.c | 23 +++++++++++++++++++++++
+ 3 files changed, 33 insertions(+), 1 deletion(-)
+
+diff --git a/fuzzing/fuzz_key.c b/fuzzing/fuzz_key.c
+index 77cb684..7d00443 100644
+--- a/fuzzing/fuzz_key.c
++++ b/fuzzing/fuzz_key.c
+@@ -26,11 +26,20 @@ test_parse (const gchar   *data,
+             GKeyFileFlags  flags)
+ {
+   GKeyFile *key = NULL;
++  char *comment = NULL;
++  char **list = NULL;
+ 
+   key = g_key_file_new ();
+   g_key_file_load_from_data (key, (const gchar*) data, size, G_KEY_FILE_NONE,
+                              NULL);
+ 
++  /* Also try some additional parsing and see if it crashes */
++  comment = g_key_file_get_comment (key, "group", "key", NULL);
++  g_free (comment);
++
++  list = g_key_file_get_locale_string_list (key, "group", "key", "de", NULL, NULL);
++  g_strfreev (list);
++
+   g_key_file_free (key);
+ }
+ 
+diff --git a/glib/gkeyfile.c b/glib/gkeyfile.c
+index d08a485..54d77a5 100644
+--- a/glib/gkeyfile.c
++++ b/glib/gkeyfile.c
+@@ -2421,7 +2421,7 @@ g_key_file_get_locale_string_list (GKeyFile     *key_file,
+     }
+ 
+   len = strlen (value);
+-  if (value[len - 1] == key_file->list_separator)
++  if (len > 0 && value[len - 1] == key_file->list_separator)
+     value[len - 1] = '\0';
+ 
+   list_separator[0] = key_file->list_separator;
+diff --git a/glib/tests/keyfile.c b/glib/tests/keyfile.c
+index bc125c1..289bd2b 100644
+--- a/glib/tests/keyfile.c
++++ b/glib/tests/keyfile.c
+@@ -850,6 +850,28 @@ test_locale_string_multiple_loads (void)
+   g_free (old_locale);
+ }
+ 
++static void
++test_locale_string_empty (void)
++{
++  GKeyFile *keyfile = NULL;
++  GError *local_error = NULL;
++  const char *data =
++    "[valid]\n"
++    "key1=\n";
++
++  g_test_summary ("Check that loading an empty translatable string works");
++  g_test_bug ("https://gitlab.gnome.org/GNOME/glib/-/issues/3930");
++
++  keyfile = g_key_file_new ();
++
++  g_key_file_load_from_data (keyfile, data, -1, G_KEY_FILE_NONE, &local_error);
++  g_assert_no_error (local_error);
++
++  check_locale_string_list_value (keyfile, "valid", "key1", NULL, NULL);
++
++  g_key_file_free (keyfile);
++}
++
+ static void
+ test_lists (void)
+ {
+@@ -1939,6 +1961,7 @@ main (int argc, char *argv[])
+   g_test_add_func ("/keyfile/number", test_number);
+   g_test_add_func ("/keyfile/locale-string", test_locale_string);
+   g_test_add_func ("/keyfile/locale-string/multiple-loads", test_locale_string_multiple_loads);
++  g_test_add_func ("/keyfile/locale-string/empty", test_locale_string_empty);
+   g_test_add_func ("/keyfile/lists", test_lists);
+   g_test_add_func ("/keyfile/lists-set-get", test_lists_set_get);
+   g_test_add_func ("/keyfile/group-remove", test_group_remove);

meta/recipes-core/glib-2.0/glib-2.0_2.78.6.bb

@@ -53,6 +53,7 @@ SRC_URI = "${GNOME_MIRROR}/glib/${SHRT_VER}/glib-${PV}.tar.xz \
            file://CVE-2026-58011.patch \
            file://CVE-2026-58012.patch \
            file://CVE-2026-58013.patch \
+           file://CVE-2026-58014.patch \
            "
 SRC_URI:append:class-native = " file://relocate-modules.patch \
                                 file://0001-meson.build-do-not-enable-pidfd-features-on-native-g.patch \