Researchers from Google have demonstrated yet another variant of the Rowhammer vulnerability that targets increasingly smaller DRAM chips to bypass all current mitigations. The new technique hinges on the weak coupling between two memory rows that are not immediately adjacent to each other but one row removed in an attempt to tamper with data stored in memory and attack a system. Rowhammer attacks are similar to speculative execution in that both break the fundamental security guarantees made by the underlying hardware. Google said it’s currently working with the Joint Electron Device Engineering Council (JEDEC) to identify possible solutions for Rowhammer exploits.
Source: https://thehackernews.com/2021/05/google-researchers-discover-new-variant.html