CVE-2026-111735 Integer underflow leads to out-of-bounds read in pf_cpm_c_data_ind()
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-111735?
CVE-2026-111735 is a high-severity vulnerability in RT-Labs P-Net, published on 29 Oct 2026.
Official 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.
Which versions are affected by CVE-2026-111735?
How do I fix CVE-2026-111735?
No fix has been published for CVE-2026-111735 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-111735 being exploited?
There is no known exploitation of CVE-2026-111735 in the wild and no public exploit code.
Sources
Also known as GHSA-pmgf-c5w3-wm94.