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7.1

P-Net before 1.0.3 may crash or expose data

CVE-2026-111734 · published 6 days ago
Summary

Versions of P-Net released before 1.0.3 can read beyond the end of a network packet because they do not check how long the packet is. This can cause the software to stop working or reveal information stored in memory. Update to P-Net 1.0.3 or later, or apply the vendor’s patch, to prevent the issue.

Original advisory text
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 bo...
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.
References
Fix within
Internet-facing 60 days
Internal At next upgrade
  • Not known to be exploited
  • Needs hands-on effort to exploit (estimated)
  • Gives an attacker partial control (estimated)
Severity
7.1 High
Exploitation
<1% chance of attack within 30 days
Type
CWE-125Out-of-bounds Read
Timeline
Published29 Oct 2026
Updated30 Oct 2026
First seen29 Oct 2026
Sources
CVE-2026-111734 · NVD
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