D3-NPC — Null Pointer Checking | CSURFACE Threat Sensor

Definition

Checking if a pointer is NULL.

Programmatically checking if a pointer is NULL before use.

•Pointers should be checked prior to use after they have, or may have been modified.

•Note that it may vary by circumstance whether the caller, or callee is responsible for checking if a pointer is NULL.

•Note: This resource should not be considered a definitive or exhaustive coding guideline.

This defensive technique relates to specific digital artifacts.

Reference - Null Pointer Checking - SEI Reference - Null Pointer Dereferencing - CWE-476 Reference - Pointer Validation Function - SEI