Researchers found a new vulnerability that impacts the confidentiality of data stored in a computer’s memory. Using it, they were successfully able to extract a signing key from an OpenSSH server using normal user privileges. The attack is based on the Rowhammer vulnerability and can be used to break the safe-storage promise of random access memory (RAM) modules. RAMBleed functions using the same principle, but unlike Rowhammer, it reads the information instead of modifying it, making it more suitable for stealing it.
Source: https://www.bleepingcomputer.com/news/security/rambleed-attack-can-steal-sensitive-data-from-computer-memory/