Karamba XGuard CFI

Karamba XGuard CFI (Control Flow Integrity) is a runtime memory protection solution designed for embedded systems. It uses a patented Control Flow Graph, automatically generated at build time, to monitor and validate both forward and backward memory address jumps during execution. The solution operates at the OS and application levels, protecting function calls across all binaries, libraries, and scripts, including OS-level functions. By enforcing the expected control flow at runtime, it prevents exploitation of memory vulnerabilities such as buffer overflow, even when such vulnerabilities exist in the code. XGuard CFI is embedded directly into the device image, requiring no cloud connectivity and no ongoing updates. It operates in an isolated, always-on manner, making it suitable for resource-constrained embedded environments. A key design characteristic is its low performance overhead: less than 5% CPU usage and less than 10% additional RAM consumption. The solution is OS-agnostic and applies across connected device hardware, enabling uniform deployment across a product portfolio. Karamba XGuard CFI targets industries including automotive, medical devices, and IoT, and is compliant with ISO, NIST, and ETSI security standards.