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Freeing memory that is not allocated dynamically can lead to serious errors similar to those discussed in MEM31-C. Free dynamically allocated memory exactly oncewhen no longer needed. The consequences of this error depend on the implementation, but they range from nothing to abnormal program termination. Regardless of the implementation, avoid calling free() on anything other than a pointer returned by a dynamic memory allocation function, such as malloc(), calloc(), realloc(), or aligned_alloc().
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| CERT C Secure Coding Standard | MEM31-C. Free dynamically allocated memory exactly oncewhen no longer needed |
| CERT C++ Secure Coding Standard | MEM34-CPP. Only free memory allocated dynamically |
| ISO/IEC TS 17961 | Reallocating or freeing memory that was not dynamically allocatied [xfree] |
| MITRE CWE | CWE-590, Free of invalid pointer not on the heap |
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