void vnc_disconnect_finish(VncState *vs)
{
    int i;

    vnc_jobs_join(vs); /* Wait encoding jobs */

    vnc_lock_output(vs);
    vnc_qmp_event(vs, QAPI_EVENT_VNC_DISCONNECTED);

    buffer_free(&vs->input);
    buffer_free(&vs->output);
#ifdef CONFIG_VNC_WS
    buffer_free(&vs->ws_input);
    buffer_free(&vs->ws_output);
#endif /* CONFIG_VNC_WS */

    qapi_free_VncClientInfo(vs->info);

    vnc_zlib_clear(vs);
    vnc_tight_clear(vs);
    vnc_zrle_clear(vs);

#ifdef CONFIG_VNC_TLS
    vnc_tls_client_cleanup(vs);
#endif /* CONFIG_VNC_TLS */
#ifdef CONFIG_VNC_SASL
    vnc_sasl_client_cleanup(vs);
#endif /* CONFIG_VNC_SASL */
    audio_del(vs);
    vnc_release_modifiers(vs);

    if (vs->initialized) {
        QTAILQ_REMOVE(&vs->vd->clients, vs, next);
        qemu_remove_mouse_mode_change_notifier(&vs->mouse_mode_notifier);
    }

    if (vs->vd->lock_key_sync)
        qemu_remove_led_event_handler(vs->led);
    vnc_unlock_output(vs);

    qemu_mutex_destroy(&vs->output_mutex);
    if (vs->bh != NULL) {
        qemu_bh_delete(vs->bh);
    }
    buffer_free(&vs->jobs_buffer);

    for (i = 0; i < VNC_STAT_ROWS; ++i) {
        g_free(vs->lossy_rect[i]);
    }
    g_free(vs->lossy_rect);
    g_free(vs);
}

This category addresses vulnerabilities caused by flawed access control mechanisms, where incorrect permission settings allow unauthorized users to access restricted resources.