I thought that Rowhammer was a thing of the past. Out of curiosity I found code to test for this and ran it on some of my hosts. My old desktop - I7-4770K/DDR3 - was susceptible. My old server - Xeon X3460/DDR3+ECC - was not. I upgraded the desktop with components based on a Ryzen 7 7700X/DDR5. It tested not susceptible. I'm not sure if that's a result of RAM designed not to be susceptible or that (I think) DDR5 RAM uses modules with on die ECC.
I was not able to test any of my Raspberry Pis because the test code used some facility available on the AMD64 architecture that is not available on the ARM64 processors. The newer Pi 4B and 5 use modules with on die ECC.
It seems to me that ECC should prevent Rowhammer susceptibility. That should prevent it on server grade H/W for anything still in service and newer consumer systems.
I have no idea if Rowhammer affects other architectures than AMD64.
I was not able to test any of my Raspberry Pis because the test code used some facility available on the AMD64 architecture that is not available on the ARM64 processors. The newer Pi 4B and 5 use modules with on die ECC.
It seems to me that ECC should prevent Rowhammer susceptibility. That should prevent it on server grade H/W for anything still in service and newer consumer systems.
I have no idea if Rowhammer affects other architectures than AMD64.