---
id: CVE-2026-111730
title: >-
  Out-of-bounds write in CheckPeers block parser due to unvalidated peer station
  name length
summary: >-
  P-Net before 1.0.3 does not validate the LengthPeerStationName field of a
  CheckPeers block in get_check_peer(). The received length (up to 255) was used
  to copy data into the 241-byte peer station name buffer and to place the
  terminating…
severity: high
cvss: 7.2
cvssVector: 'CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N'
cvssSource: cna
cwe:
  - CWE-787
vendor: RT-Labs
product: P-Net
affected:
  - P-Net < 1.0.3
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-05T21:20:27.161030Z'
published: '2026-10-29'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T21:20:34.521Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-111730'
references:
  - url: 'https://rt-labs.com/wp-content/uploads/2026/10/RRTL-261019-01.pdf'
    label: Cybersecurity advisory for P-Net
tags:
  - cve.org
epss: 0.00186
epssPercentile: 0.08248
ingestedAt: '2026-11-01T20:00:16.967Z'
---

## Overview

P-Net before 1.0.3 does not validate the LengthPeerStationName field of a CheckPeers block in get_check_peer(). The received length (up to 255) was used to copy data into the 241-byte peer station name buffer and to place the terminating NUL byte, so a crafted block writes up to 15 bytes past the end of the buffer. This can lead to a crash (denial of service) or potentially arbitrary code execution.



Requires establishment of session that needs ADJACENT network access.

## Affected

- `P-Net < 1.0.3`

## Remediation

Upgrade to P-Net 1.0.3 or later.