A devoted attacker could obtain sensitive info from privileged memory, e.g. DRAM or CPU cache
Upcoming up on the list of chip makers vulnerable to exotic aspect-channel assaults: Arm, which claims its Cortex-A57, A72, A73 and A75 processors have a bug that would permit a malicious actor “improperly get tiny bits of sensitive info from privileged memory (DRAM or CPU cache).”
The concern has been allotted CVE-2020-13844.
Facet-channel assaults require exploiting the way CPUs process info ahead of an explicit instruction (to strengthen velocity) then discard the unneeded computations. A devoted attacker can, in principle, glean a