Also known as: memory-safe language · memory safety bug
Memory safety is the property of a program being unable to access memory outside the bounds of what it legitimately owns, preventing entire vulnerability classes such as buffer overflows, use-after-free, and data races.
Multiple large-scale audits by browser vendors, operating system developers, and government agencies have converged on a similar finding: roughly two-thirds of critical vulnerabilities in large C and C++ codebases stem from memory-safety errors.
Memory-safe languages such as Rust, Go, Java, and Python enforce safety through ownership models, garbage collection, or runtime bounds checking. This does not make software secure — logic flaws, injection, and authentication failures are unaffected — but it eliminates a very large and historically dominant category.
Rust
Rust is a systems programming language that guarantees memory safety without garbage collection, using a compile-time ownership and borrowing model to eliminate entire classes of bugs including use-after-free and data races.
Buffer Overflow
A buffer overflow is a memory-safety vulnerability in which a program writes more data into a fixed-size memory buffer than it can hold, corrupting adjacent memory and potentially allowing an attacker to alter program execution.
Use-After-Free
A use-after-free is a memory-safety vulnerability in which a program continues to use a pointer to memory that has already been released, allowing an attacker who can control what occupies that memory to influence program behaviour.
Kernel
The kernel is the core of an operating system, responsible for managing memory, scheduling processes, and mediating all access between software and hardware. The Linux kernel is the component that makes a system 'Linux'.
Defense in Depth
Defense in depth is a security strategy that layers multiple independent controls so that the failure or bypass of any single control does not result in compromise.