Rowhammer is a severe issue with recent generation dynamic random access memory (DRAM) chips in which repeatedly accessing a row of memory can cause “bit flipping” in an adjacent row, allowing anyone to change the contents of computer memory. The newly discovered technique could allow attackers to launch Rowhammer attack on the targeted systems just by sending specially crafted packets to the vulnerable network cards over the local area network. Researchers believe the Rowhammer threat is not only real but also has potential to cause real, severe damage.
Source: https://thehackernews.com/2018/05/rowhammer-attack-exploit.html