VNX-823 – Use of Out-of-range Pointer Offset

Overview

VNX-823 maps to CWE-823: Use of Out-of-range Pointer Offset. Detects source patterns associated with CWE-823 (Use of Out-of-range Pointer Offset). Each finding should be manually reviewed for exploitability in context.

Severity: Medium | CWE: CWE-823 | Languages: c

Why This Matters

This weakness class (Use of Out-of-range Pointer Offset) creates a concrete exploit surface: the rule searches for the concrete source-level patterns most commonly associated with CWE-823 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 'p + ' pattern
p +

Remediation

  1. Review each flagged line and determine whether the pattern represents a real instance of CWE-823 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-823 comment on the line.
  4. Ensure equivalent test coverage exists to prevent regression.

References