---
id: "CVE-2026-109576"
kind: "vulnerability"
aliases: ["CVE-2026-109576"]
title: "PEAK-System PCAN driver: malformed record parsing loop miscounts processed bytes"
severity: "medium"
cvss: 6.8
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["infrastructure", "linux", "pcan", "peak-system", "windows"]
not_affected_if: []
published_at: "2026-10-20T21:17:15+00:00"
first_seen_at: "2026-10-23T21:57:21+00:00"
updated_at: "2026-10-25T03:44:35+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-109576", "first_seen_at": "2026-10-23T21:57:21+00:00"}]
---

# PEAK-System PCAN driver: malformed record parsing loop miscounts processed bytes

The PEAK-System PCAN driver's parser detects a malformed record but still advances its processed-bytes counter when it rejects that record. The sources do not say what an attacker gains beyond this parsing fault.

_Summary, check and fix written by a model from the sources; labelled as such._

## Timeline

- 2026-10-23T21:57:21+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-109576

## From the sources

The parser in PEAK-System PCAN driver correctly detected the malformed record, but the loop iterating the record list advanced its processed-bytes counter even when a record had been rejected as invalid.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_