CVE-2026-111734 Details
Description
P-Net before 1.0.3 does not validate the length of a received Ethernet frame in pf_eth_recv() before reading the EtherType, any VLAN tags and the PROFINET FrameID. The VLAN tag loop had no upper bound, so a truncated frame, or a frame consisting only of VLAN tags, makes the function read past the end of the receive buffer. This can cause a crash (denial of service) or disclose memory content.
A vulnerability in P-Net versions prior to 1.0.3 allows for out-of-bounds reading of Ethernet frames in the function pf_eth_recv(). The issue arises because the software does not properly validate the length of received Ethernet frames before processing the EtherType, VLAN tags, and PROFINET FrameID. This lack of validation can lead to reading past the end of the receive buffer, causing a crash or disclosing memory content. The vulnerability can be exploited with adjacent network access.
Users are advised to upgrade to P-Net version 1.0.3 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 29, 2026CISA-ADP
Assessed Nov 5, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://rt-labs.com/wp-content/uploads/2026/10/RRTL-261019-01.pdf | 4b71179a-3b92-4a9d-b9fc-af8b8ed579ee | AdvisoryBundleRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-125 | Out-of-bounds Read | 4b71179a-3b92-4a9d-b9fc-af8b8ed579ee |
Affected Products
| Product | Versions |
|---|---|
| RT-Labs P-Net | < 1.0.3 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Nov 5, 2026 | CVE Modified | CISA-ADP |
| Oct 29, 2026 | New CVE Received | 4b71179a-3b92-4a9d-b9fc-af8b8ed579ee |