For the past two years, since researchers discovered the attack, the term Rowhammer has been used to describe a procedure through which attackers launch read & write operations at a row of memory bits inside a RAM memory card.

The repeated read and write operations cause an electromagnetic field to appear, which changes local memory bits from 0 to 1 and vice versa, in a process called bit flipping.

For their research paper, called Drammer: Deterministic Rowhammer Attacks on Mobile Platforms, researchers tested and found multiple smartphone models to be vulnerable to their attack.

The list includes LG Nexus (4, 5, 5X), LG G4, Motorola Moto G (2013 and 2014), One Plus One, HTC Desire 510, Lenovo K3 Note, Xiaomi Mi 4i, and Samsung Galaxy (S4, S5, and S6) devices. Researchers estimate that millions of Android users might be vulnerable.

Source: Rowhammer Attack Can Now Root Android Devices