>unlike Rowhammer, RAMBleed does not require persistent bit flips, and is thus effective against ECC memory commonly used by server computers.
Seems like mitigations for Rowhammer is not enough for RAMBleed.
Seems like mitigations for Rowhammer is not enough for RAMBleed.
The paper even specifically says that SEV and other similar technologies protect against this.
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".