VNX-843 – Access of Resource Using Incompatible Type ('Type Confusion')

Overview

VNX-843 maps to CWE-843: Access of Resource Using Incompatible Type (‘Type Confusion’). Detects source patterns associated with CWE-843 (Access of Resource Using Incompatible Type (‘Type Confusion’)). Each finding should be manually reviewed for exploitability in context.

Severity: High | CWE: CWE-843 | Languages: c, cpp

Why This Matters

This weakness class (Access of Resource Using Incompatible Type (‘Type Confusion’)) creates a concrete exploit surface: the rule searches for the concrete source-level patterns most commonly associated with CWE-843 and surfaces them for review. Each finding should be evaluated in context — the rule catches the pattern, not the context.

What Gets Flagged

// FLAGGED: contains '(struct X*)' pattern
(struct X*)

Remediation

  1. Review each flagged line and determine whether the pattern represents a real instance of CWE-843 or a false positive.
  2. Replace the flagged construct with a documented safe alternative appropriate to your language and framework.
  3. For confirmed false positives, add a # vulnetix-ignore: VNX-843 comment on the line.
  4. Ensure equivalent test coverage exists to prevent regression.

References