---
id: "CVE-2026-101103"
kind: "vulnerability"
aliases: ["CVE-2026-101103"]
title: "PEAK-System PCAN diagnostic call can overflow a caller-supplied output buffer"
severity: "medium"
cvss: 6.8
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["hardware-interface", "infrastructure", "pcan", "peak-system"]
not_affected_if: []
published_at: "2026-10-20T21:17:14+00:00"
first_seen_at: "2026-10-23T21:57:21+00:00"
updated_at: "2026-10-25T03:44:38+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-101103", "first_seen_at": "2026-10-23T21:57:21+00:00"}]
---

# PEAK-System PCAN diagnostic call can overflow a caller-supplied output buffer

The PEAK-System PCAN diagnostic call does not check that the caller's output buffer is large enough for the output record. Writing past the buffer can corrupt memory in the calling process.

_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-2026-101103

## From the sources

The PEAK-System PCAN diagnostic call did not validate that the caller-supplied output buffer was large enough to hold the output record.

---

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