Out-of-Bounds Write Vulnerability in P-Net by RT Labs
CVE-2026-111732

9.3CRITICAL

Key Information:

Vendor

Rt-labs

Status
P-net
Vendor
CVE Published:
29 October 2026

What is CVE-2026-111732?

The P-Net software, prior to version 1.0.3, contains a vulnerability that arises when it is built with the PNET_OPTION_AR_VENDOR_BLOCKS option enabled. Under certain circumstances, it inadequately parses a data length from an ARVendorBlock request. This improper handling allows for the possibility of writing beyond the allocated buffer space, triggered by a specially crafted Connect request. As a result, this can lead to significant issues such as a denial of service or even the potential for arbitrary code execution, making it crucial for users to assess their current P-Net versions and apply the latest updates.

Affected Version(s)

P-Net 0 < 1.0.3

References

https://rt-labs.com/wp-content/uploads/2026/10/RRTL-26101...

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

f0rw4rd (quellsec.dev)
.