If this attack is a concern then so is rowhammer. So you can basically ask whether cloud providers have mitigated rowhammer.
AMD's SEV might help protecting VMs from each other.
AMD's SEV might help protecting VMs from each other.
Seems like mitigations for Rowhammer is not enough for RAMBleed.
https://www.vusec.net/projects/eccploit/
tl;dr ECC logic can't cope with 'single' errors involving > 2 bits.
If these errors are actually treated as errors, then chips will be disabled or processes will get blacklisted long before they can be used to exploit.
So this is really "ECC is often configured wrong", not "ECC isn't effective".
The paper even specifically says that SEV and other similar technologies protect against this.