CVE-2026-111735 Details
Description
P-Net before 1.0.3 contains an integer underflow in pf_cpm_c_data_ind(). When handling a received cyclic data frame while the consumer is in the FRUN or RUN state, the offset of the APDU status was computed as the frame length minus 4 using 16-bit arithmetic, without checking that the frame is long enough. A crafted short frame makes the offset wrap around, so the function reads outside the receive buffer. This can cause a crash (denial of service) or disclose memory content.
A vulnerability exists in P-Net versions prior to 1.0.3, where an integer underflow in the function pf_cpm_c_data_ind() can be exploited. When a cyclic data frame is received while the consumer is in the FRUN or RUN state, the offset for the APDU status is calculated using 16-bit arithmetic, subtracting 4 from the frame length, without verifying if the frame is sufficiently long. This oversight allows a crafted short frame to cause the offset to wrap around, leading the function to read outside the bounds of the receive buffer. Such exploitation can result in a crash, causing a denial-of-service condition, or potentially disclose memory contents.
Users are advised to upgrade to P-Net version 1.0.3 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 29, 2026CISA-ADP
Assessed Nov 5, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://rt-labs.com/wp-content/uploads/2026/10/RRTL-261019-01.pdf | 4b71179a-3b92-4a9d-b9fc-af8b8ed579ee | AdvisoryBundleRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-125 | Out-of-bounds Read | 4b71179a-3b92-4a9d-b9fc-af8b8ed579ee |
| CWE-191 | Integer Underflow (Wrap or Wraparound) | 4b71179a-3b92-4a9d-b9fc-af8b8ed579ee |
Affected Products
| Product | Versions |
|---|---|
| RT-Labs P-Net | < 1.0.3 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Nov 5, 2026 | CVE Modified | CISA-ADP |
| Oct 29, 2026 | New CVE Received | 4b71179a-3b92-4a9d-b9fc-af8b8ed579ee |