CVE-2026-9622: CWE-191 Integer underflow (wrap or wraparound) in Rockwell Automation RSLinx Classic®
A denial-of-service security issue exists within RSLinx® Classic. A crafted CIP packet targeting the Forward Close service can cause the RSLinx® Classic service to crash, requiring a restart of the service to recover.
CVE-2026-9622: CWE-191 Integer underflow (wrap or wraparound) in Rockwell Automation RSLinx Classic®
Description
A denial-of-service security issue exists within RSLinx® Classic. A crafted CIP packet targeting the Forward Close service can cause the RSLinx® Classic service to crash, requiring a restart of the service to recover.
CVSS v4.0
Score 8.7high
Weaknesses
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Rockwell
- Date Reserved
- 2026-05-26T17:18:22.609Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a96d8b2acd9273b49c6bfa2
Added to database: 09/01/2026, 13:52:50 UTC
Last updated: 09/01/2026, 14:37:08 UTC
Views: 3
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