CVE-2026-42199 — Integer Overflow

title: Potential Grid Integer Overflow Exploit Attempt (CVE-2026-42199)
id: scw-2026-05-08-ai-1
status: experimental
level: high
description: |
  This rule detects processes that are attempting to exploit the integer overflow vulnerability in the Grid library's expand_rows() function (CVE-2026-42199). The vulnerability occurs in versions prior to 1.0.1 and can lead to undefined behavior. This detection looks for the 'grid' binary being executed with command-line arguments that specifically mention 'expand_rows', indicating a potential exploit attempt.
author: SCW Feed Engine (AI-generated)
date: 2026-05-08
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-42199/
tags:
  - attack.execution
  - attack.t1204.002
logsource:
    category: process_creation
detection:
  selection:
      Image|contains:
          - 'grid'
      CommandLine|contains:
          - 'expand_rows'
      condition: selection
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse