# CVE-2026-112200: P-Net resource exhaustion via malformed RPC requests

Source: https://junglewise.ai/threats/cve-2026-112200-p-net-before-1-0-3-does-not-release-the-application-relationship  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-29. Updated: 2026-10-29  
License: CC BY 4.0 with a link back

CVE-2026-112200 · Severity: info · Published 2026-10-29

P-Net is an industrial protocol stack used in automation systems. An attacker can send specially crafted network requests that cause the device to leak memory and network connections, eventually exhausting available resources. Once resources are exhausted, the device stops responding to all requests and must be restarted, causing a denial of service.

Technologies: [RT-Labs P-Net](https://junglewise.ai/threats/technologies/p-net). Vendors: [RT-Labs](https://junglewise.ai/threats/vendors/rt-labs).

## Quick answers

**Is CVE-2026-112200 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-112200 being exploited in the wild.

**How severe is CVE-2026-112200?** Informational severity, published 29 October 2026.

**Which products and versions are affected?** RT-Labs P-Net before 1.0.3.

**Is there a fix for CVE-2026-112200?** Yes: fixed in P-Net 1.0.3. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-112200 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-112200?** Check whether you run RT-Labs P-Net at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in P-Net 1.0.3

## Technical details

The vulnerability is a resource leak in RPC request handling: when an RPC request with incorrect data endianness is rejected, the Application Relationship (AR) and RPC session are not properly deallocated. Repeated malformed requests from an unauthenticated remote attacker exhaust available sessions, causing the device to stop accepting new RPC connections including the initial Connect handshake until reboot.

## Affected products

- RT-Labs P-Net before 1.0.3

## Timeline

- 2026-10-29: disclosed

## References

- [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)

## Related threats

- [P-Net buffer over-read in DCP message processing](https://junglewise.ai/threats/cve-2026-115795-p-net-before-1-0-3-does-not-check-that-a-complete-block-header)
- [P-Net buffer over-read in RTA alarm callback](https://junglewise.ai/threats/cve-2026-115794-p-net-before-1-0-3-passes-the-application-alarm-callback-a-data)
- [P-Net RPC session leak leading to denial of service](https://junglewise.ai/threats/cve-2026-115793-p-net-before-1-0-3-does-not-release-the-rpc-session-allocated)
- [P-Net NULL pointer dereference in implicit read request handling](https://junglewise.ai/threats/cve-2026-111736-p-net-before-1-0-3-dereferences-a-null-ar-pointer-in-pf-fspm-cm)
- [P-Net integer underflow in pf_cpm_c_data_ind()](https://junglewise.ai/threats/cve-2026-111735-p-net-before-1-0-3-contains-an-integer-underflow-in-pf-cpm-c)