---
title: "CVE-2026-111735: P-Net - Integer Underflow"
description: "P-Net before 1.0.3 contains an integer underflow caused by improper offset calculation in pf_cpm_c_data_ind() when handling short cyclic data frames, letting attackers cause denial of service or memory disclosure, exploit requires crafted short frame."
url: https://panop.io/threat-heartbeat/CVE-2026-111735/
---

# CVE-2026-111735 P-Net - Integer Underflow

P-Net before 1.0.3 contains an integer underflow caused by improper offset calculation in pf\_cpm\_c\_data\_ind() when handling short cyclic data frames, letting attackers cause denial of service or memory disclosure, exploit requires crafted short frame.

CVSS base score 7.1 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.17% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-111735)

## Details

Type

Integer Underflow

Impact

Denial Of Service, Information Disclosure

CVSS vector

CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Published

29 October 2026

Updated

31 October 2026

Weakness

[CWE-125](https://cwe.mitre.org/data/definitions/125.html)

## Vendor fix

Update to version 1.0.3 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-111735](https://nvd.nist.gov/vuln/detail/CVE-2026-111735)
- [https://rt-labs.com/wp-content/uploads/2026/10/RRTL-261019-01.pdf](https://rt-labs.com/wp-content/uploads/2026/10/RRTL-261019-01.pdf)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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