VNX-191 – Integer Underflow (Wrap or Wraparound)

Overview

VNX-191 maps to CWE-191: Integer Underflow (Wrap or Wraparound). Detects source patterns associated with CWE-191 (Integer Underflow (Wrap or Wraparound)). Each finding should be manually reviewed for exploitability in context.

Severity: High | CWE: CWE-191 | Languages: c, cpp, go, java

Why This Matters

This weakness class (Integer Underflow (Wrap or Wraparound)) creates a concrete exploit surface: the rule searches for the concrete source-level patterns most commonly associated with CWE-191 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 'unsigned ' pattern
unsigned

Remediation

  1. Review each flagged line and determine whether the pattern represents a real instance of CWE-191 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-191 comment on the line.
  4. Ensure equivalent test coverage exists to prevent regression.

References