High 7.1Published Oct 29, 2026

CVE-2026-111735Integer underflow leads to out-of-bounds read in pf_cpm_c_data_ind()

Updated under an hour ago (Oct 29, 2026, 11:23 PM ET)

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It affects RT-Labs P-Net. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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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.

CVSS: 7.1 HIGH (v4.0, CNA)CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
Weakness (CWE): CWE-191, CWE-125
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: rt-labs
NVD analysis: Deferred
Record last updated: Oct 29, 2026
First seen by InfoSec Signals: Oct 29, 2026

Affected products

Affected products

RT-Labs P-Net rt_labs:p_net (from the name)	before 1.0.3	CNA record

References

References

https://rt-labs.com/wp-content/uploads/2026/10/RRTL-261019-01.pdf

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.