Integer underflow leads to out-of-bounds read in pf_cpm_c_data_ind()
Impact
P-Net before 1.0.3 has an integer underflow in pf_cpm_c_data_ind(), causing an out-of-bounds read when handling a crafted short cyclic data frame, potentially leading to a crash or memory content disclosure. The issue occurs when the consumer is in the FRUN or RUN state. A crafted frame can make the offset wrap around, reading outside the receive buffer.
Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.What to do
Upgrade to P-Net 1.0.3 or later.
Affected packages
Affected products
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RT-Labs · rt-labs
P-Net
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RT-Labs · rt-labs
P-Net
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affected
0 → before 1.0.3
semver versions
Other versions: unaffected
Original source 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.
Inside the record
Evidence available
Describes the evidence in this view, not whether the product is safe.
Original records
CVE-2026-111735View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.
cve.new JSON →Underlying weaknesses
The source’s classification of what caused the vulnerability.
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What changed
Follow changesLarge field values are marked as truncated previews. Original source snapshots remain retained.