NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL. A NULL pointer dereference usually results in the failure of the process unless exception handling (on some platforms) is available and implemented. Thus, it often leads to a failure of availability (a part of the definition of security). In C, dereferencing a null pointer is undefined behavior (UB), permitting any result including any kind of security vulnerability.

This is weakness CWE-476.

Source: https://cwe.mitre.org/data/definitions/476.html