nsPluginInstance::DestroyStream(NPStream* /*stream*/, NPError /*reason*/)
{
    if (_streamfd != -1) {
        if (close(_streamfd) == -1) {
            perror("closing _streamfd");
        } else {
            _streamfd = -1;
        }
    }

    return NPERR_NO_ERROR;
}

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