---
id: CVE-2026-115794
title: Alarm data length not validated against received frame length
summary: >-
  P-Net before 1.0.3 passes the application alarm callback a data length derived
  from the variable part length field of a received RTA alarm frame without
  checking it against the length of the received frame. A short frame can make
  the cal…
severity: low
cvss: 2.3
cvssVector: 'CVSS:4.0/AV:A/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N'
cvssSource: cna
cwe:
  - CWE-130
vendor: RT-Labs
product: P-Net
affected:
  - P-Net < 1.0.3
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-05T21:25:13.438595Z'
published: '2026-10-29'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T21:25:25.300Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-115794'
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: 0.00176
epssPercentile: 0.07177
ingestedAt: '2026-11-01T20:00:16.992Z'
---

## Overview

P-Net before 1.0.3 passes the application alarm callback a data length derived from the variable part length field of a received RTA alarm frame without checking it against the length of the received frame. A short frame can make the callback receive a length of up to 65507 bytes. An application that copies the reported number of bytes reads past the end of the receive buffer. The attacker must have established an Application Relationship and requires ADJACENT network access. Applications that do not use the alarm data are not affected.

## Affected

- `P-Net < 1.0.3`

## Remediation

Upgrade to P-Net 1.0.3 or later.