CMMC Practice SC.3.182
Prevent unauthorized and unintended information transfer via shared system resources.
Bold Coast Security Guidance
For Level 3 compliance and organization must have a system lifecycle plan that includes sourcing only systems with basic data-leakage protections in place, and also a formal set of system build and hardening procedures with policies in place to require them.
DRAFT NIST SP 800-171 R2
The control of information in shared system resources (e.g., registers, cache memory, main memory, hard disks) is also commonly referred to as object reuse and residual information protection. This requirement prevents information produced by the actions of prior users or roles (or the actions of processes acting on behalf of prior users or roles) from being available to any current users or roles (or current processes acting on behalf of current users or roles) that obtain access to shared system resources after those resources have been released back to the system. This requirement also applies to encrypted representations of information. This requirement does not address information remanence, which refers to residual representation of data that has been nominally deleted; covert channels (including storage or timing channels) where shared resources are manipulated to violate information flow restrictions; or components within systems for which there are only single users or roles.