In Amazon AWS Firecracker before 0.21.3, and 0.22.x before 0.22.1, the serial console buffer can grow its memory usage without limit when data is sent to the standard input. This can result in a memory leak on the microVM emulation thread, possibly occupying more memory than intended on the host.
Firecracker is an open source virtualization technology that is purpose-built for creating and managing secure, multi-tenant container and function-based services.
You can visit their official site here.
Update to the latest version of Amazon AWS Firecracker.