Vulnerability 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.
Related Weaknesses (CWE)
References
FAQ
What is CVE-2026-111734?
CVE-2026-111734 is a documented vulnerability. 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...
How severe is CVE-2026-111734?
CVSS scoring is not yet available for CVE-2026-111734. Check NVD for updates.
Is there a patch for CVE-2026-111734?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.