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CVE-2026-111734high7.1

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

Impact

P-Net before 1.0.3 is vulnerable to a denial of service or memory disclosure due to missing length validation in pf_eth_recv(). An attacker with access to the network can send a truncated or malformed Ethernet frame, causing the function to read past the end of the receive buffer.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

What to do

Upgrade to P-Net 1.0.3 or later.

rt-labs guidance

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

RT-Labs · rt-labs

P-Net

1 range
rt-labs version evidence

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affected

0 → before 1.0.3

semver versions

unaffected

unknown

Other versions: unaffected

Original source 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.

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance
Weakness classification
Additional publishers · not supplied

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-111734

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-125 ↗

CWE-125 Out-of-bounds Read

rt-labs

Related →
Contributing organizations · 1
rt-labs

Assigning organization

2026-10-29

What changed

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References

1 sources
rt-labs.com/wp-content/uploads/2026/10/RRTL-261019-01.pdf
Source referencert-labs