26 vulnerabilities classified as CWE-825 (无效指针解引用). AI Chinese analysis included.
CWE-825, Expired Pointer Dereference, is a memory safety weakness where software accesses memory via a pointer after that memory has been deallocated. This vulnerability typically arises when developers fail to nullify pointers following memory release, allowing the program to retain references to freed resources. Attackers exploit this by triggering the initial deallocation and then manipulating the system to reallocate that specific memory address with malicious data. When the expired pointer is subsequently dereferenced, the application reads or overwrites unintended data, potentially leading to information disclosure, denial of service, or arbitrary code execution. To prevent this, developers must rigorously manage memory lifecycles by setting pointers to null immediately after freeing them, utilizing smart pointers in modern languages, and employing static analysis tools to detect dangling references before deployment.
char* ptr = (char*)malloc (SIZE); if (err) { abrt = 1; free(ptr); } ... if (abrt) { logError("operation aborted before commit", ptr); }char* ptr = (char*)malloc (SIZE); ... if (abrt) { free(ptr); } ... free(ptr);Vulnerabilities classified as CWE-825 (无效指针解引用) represent 26 CVEs. The CWE taxonomy describes the weakness; review individual CVEs for product-specific impact.