CWE-457 (使用未经初始化的变量) — Vulnerability Class 122

CWE-457 represents a critical code quality weakness where software utilizes a variable before assigning it a defined value, resulting in unpredictable behavior or unintended execution paths. In languages like C and C++, uninitialized stack variables often retain residual data from previous operations, creating a source of non-deterministic state. Attackers typically exploit this by manipulating memory contents to influence program flow, potentially leading to information disclosure, privilege escalation, or denial of service through crashes. To mitigate this risk, developers must rigorously initialize all variables at the point of declaration or immediately before first use. Employing static analysis tools to detect uninitialized reads and adhering to strict coding standards that enforce explicit initialization practices are essential strategies for preventing this vulnerability and ensuring application stability and security.