krb5_build_principal(krb5_context context,
                     krb5_principal * princ,
                     unsigned int rlen,
                     const char * realm, ...)
{
    krb5_error_code retval = 0;
    va_list ap;

    va_start(ap, realm);
    retval = krb5_build_principal_alloc_va(context, princ, rlen, realm, ap);
    va_end(ap);

    return retval;
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.