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"While minimal kernels cannot prevent every vulnerability, reducing attack surface by removing unnecessary kernel features, drivers, and services can proactively mitigate many classes of security issues and reduce exploitability." For a long time, Linux optimization work was seen mostly as a performance exercise. Faster boot times. Smaller images. Lower RAM usage. Better cache behavior. But over the years, something interesting became increasingly obvious: Optimization and security are often deeply related. ...

Why This Post Exists I wanted to learn practical voltage fault injection on low-cost MCUs like WCH CH32V003 and Puya PY32. What is Voltage Glitching? Voltage glitching is a form of hardware fault injection where very short disturbances are introduced into a device's power supply. These disturbances can cause the CPU to skip instructions, misread memory, or bypass security checks. Researchers commonly use voltage glitching to study the robustness of microcontrollers and secure boot implementations. ...