CVE-2026-98481nfc: port100: reject frames whose declared length exceeds the received data
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: nfc: port100: reject frames whose declared length exceeds the received data port100_recv_response() passes the URB transfer buffer to port100_rx_frame_is_valid(), which checksums le16_to_cpu(frame->datalen) bytes of frame->data. datalen is a 16-bit field supplied by the device and is never checked against the number of bytes actually received (urb->actual_length), so a device reporting a datalen larger than the received frame makes port100_data_checksum() read out of bounds past the transfer buffer. Reject a response whose declared frame size does not fit the received length before validating it. Found by 0sec (https://0sec.ai) using automated source analysis; the missing bound is evident from source. Compile-tested.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 18, 2026
- First seen by InfoSec Signals
- Oct 18, 2026
Affected products
Linux Linux linux:linux (from the name) | 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 builds before 0d482995f0cdd0302450aa300c684c642d8ab31f; 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 builds before 9e8df087826b9999d1b83b06f5d85675d5a69c9e; from 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 before db66a30588630c7de30ef033f00daddef69f6ad9; 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 builds before 144ad477c381e2c592b64898d04ab4ce03b32861; from 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 before e4da1452e10c6472a4bac48dc2f6a35fff1fcd69; 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 builds before 14b1467cfc6630583650f33538174c5a1ec685ab; from 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 before 035056e07ea65be670284246d9bc62f2f00ff4a3; 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 builds before 092c6a605cbd6414ef499834c2e0da69c2c3388e | CNA record |
References
- https://git.kernel.org/stable/c/0d482995f0cdd0302450aa300c684c642d8ab31f
- https://git.kernel.org/stable/c/9e8df087826b9999d1b83b06f5d85675d5a69c9e
- https://git.kernel.org/stable/c/db66a30588630c7de30ef033f00daddef69f6ad9
- https://git.kernel.org/stable/c/144ad477c381e2c592b64898d04ab4ce03b32861
- https://git.kernel.org/stable/c/e4da1452e10c6472a4bac48dc2f6a35fff1fcd69
- https://git.kernel.org/stable/c/14b1467cfc6630583650f33538174c5a1ec685ab
- https://git.kernel.org/stable/c/035056e07ea65be670284246d9bc62f2f00ff4a3
- https://git.kernel.org/stable/c/092c6a605cbd6414ef499834c2e0da69c2c3388e
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.