Index: NetworkManager-1.40.0/src/core/dns/nm-dns-manager.c
===================================================================
--- NetworkManager-1.40.0.orig/src/core/dns/nm-dns-manager.c
+++ NetworkManager-1.40.0/src/core/dns/nm-dns-manager.c
@@ -698,6 +698,14 @@ dispatch_netconfig(NMDnsManager      *se
     gssize                        l;
     nm_auto_free_gstring GString *str = NULL;
 
+    if (!g_file_test (NETCONFIG_PATH, G_FILE_TEST_IS_EXECUTABLE)) {
+       g_set_error_literal (error,
+                            NM_MANAGER_ERROR,
+                            NM_MANAGER_ERROR_FAILED,
+                            NETCONFIG_PATH " is not executable");
+       return SR_NOTFOUND;
+    }
+
     pid = run_netconfig(self, error, &fd);
     if (pid <= 0)
         return SR_NOTFOUND;