Quick answers
- Is CVE-2026-111734 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-111734 being exploited in the wild.
- How severe is CVE-2026-111734?
- Informational severity, published 29 October 2026.
- Which products and versions are affected?
- RT-Labs P-Net before 1.0.3.
- Is there a fix for CVE-2026-111734?
- Yes: fixed in P-Net 1.0.3 and later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-111734 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-111734?
- Check whether you run RT-Labs P-Net at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- Fixed in: P-Net 1.0.3 and later
Technical details
The pf_eth_recv() function does not validate the total length of received Ethernet frames before parsing EtherType, VLAN tags, and PROFINET FrameID fields. An unbounded loop processing VLAN tags allows a truncated frame or one consisting entirely of VLAN tags to cause an out-of-bounds read past the receive buffer, resulting in denial of service via crash or information disclosure.
Affected products
- RT-Labs P-Net before 1.0.3
Timeline
- 2026-10-29: disclosed