RowHammer vulnerability is a critical issue affecting modern DRAM (dynamic random access memory) chips that could allow attackers to obtain higher kernel privileges on a targeted system by repeatedly accessing memory cells and induce bit flips. Researchers at VUSec Lab have released a tool that can identify sophisticated hammering patterns to mount real-world attacks. The tool is TRRespass fuzzer repeatedly selects different random rows at various locations in DRAM for hammering and works even when unaware of the implementation of the memory controller or the DRAM chip.
Source: https://thehackernews.com/2020/03/rowhammer-vulnerability-ddr4-dram.html