diff -uprk.orig gdk-pixbuf-0.22.0.orig/gdk-pixbuf/io-ico.c gdk-pixbuf-0.22.0/gdk-pixbuf/io-ico.c
--- gdk-pixbuf-0.22.0.orig/gdk-pixbuf/io-ico.c	2004-09-03 18:22:50 +0400
+++ gdk-pixbuf-0.22.0/gdk-pixbuf/io-ico.c	2004-09-03 18:25:45 +0400
@@ -330,6 +330,9 @@ DecodeHeader (guchar *Data, gint Bytes, 
 
 	State->HeaderSize+=I;
 
+	if (State->HeaderSize < 0)
+		return FALSE;
+
  	if (State->HeaderSize>State->BytesInHeaderBuf) {
 		guchar *tmp=realloc(State->HeaderBuf,State->HeaderSize);
 		if (!tmp)
diff -uprk.orig gdk-pixbuf-0.22.0.orig/gdk-pixbuf/io-xpm.c gdk-pixbuf-0.22.0/gdk-pixbuf/io-xpm.c
--- gdk-pixbuf-0.22.0.orig/gdk-pixbuf/io-xpm.c	2001-03-01 23:16:28 +0300
+++ gdk-pixbuf-0.22.0/gdk-pixbuf/io-xpm.c	2004-09-03 18:36:20 +0400
@@ -243,8 +243,8 @@ xpm_extract_color (const gchar *buffer)
 			break;
 		else {
 			if (numnames > 0) {
-				space -= 1;
-				strcat (color, " ");
+				strncat (color, " ", space);
+				space -= MIN (space, 1);
 			}
 
 			strncat (color, temp, space);
@@ -352,16 +352,31 @@ pixbuf_create_from_xpm (const gchar * (*
 		return NULL;
 	}
 	sscanf (buffer, "%d %d %d %d", &w, &h, &n_col, &cpp);
-	if (cpp >= 32) {
-		g_warning ("XPM has more than 31 chars per pixel.");
+	if (cpp <= 0 || cpp >= 32) {
+		g_warning ("XPM has invalid number of chars per pixel");
+		return NULL;
+	}
+	if (n_col <= 0 || n_col >= G_MAXINT / (cpp + 1)) {
+		g_warning ("XPM file has invalid number of colors");
 		return NULL;
 	}
 
 	/* The hash is used for fast lookups of color from chars */
 	color_hash = g_hash_table_new (g_str_hash, g_str_equal);
 
-	name_buf = g_new (gchar, n_col * (cpp + 1));
-	colors = g_new (_XPMColor, n_col);
+	name_buf = g_try_malloc (n_col * (cpp + 1));
+	if (!name_buf) {
+		g_warning ("Cannot allocate memory for loading XPM image");
+		g_hash_table_destroy (color_hash);
+		return NULL;
+	}
+	colors = malloc (sizeof (_XPMColor) * n_col);
+	if (!colors) {
+		g_warning ("Cannot allocate memory for loading XPM image");
+		g_hash_table_destroy (color_hash);
+		g_free (name_buf);
+		return NULL;
+	}
 
 	for (cnt = 0; cnt < n_col; cnt++) {
 		gchar *color_name;