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CVE-2026-111734

Missing length validation of EtherType, VLAN and FrameID fields in pf_eth_recv()

HIGH
7.1
CVSS Score
Published: October 29, 2026 at 03:42 PM UTC
Updated: October 29, 2026 at 04:26 PM UTC
1 product affected across 1 vendorP-Net

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Severity
HIGH7.1
Exploit prediction
EPSS 0.2%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

P-Net· Rt Labs
90%
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

Source: cverecord
https://rt-labs.com/wp-content/uploads/2026/10/RRTL-261019-01.pdf

CVSS

7.1HIGHrt-labs
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-125

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