Yes, the article mentions it:
> What if I have ECC-capable DIMMs?
> Previous work showed that due to the large number of bit flips in current DDR4 devices, ECC cannot provide complete protection against Rowhammer but makes exploitation harder.
> What if I have ECC-capable DIMMs?
> Previous work showed that due to the large number of bit flips in current DDR4 devices, ECC cannot provide complete protection against Rowhammer but makes exploitation harder.
Does that mean we need an extended ECC to deal with critical systems that require additional robustness?