CVE-2026-98481
Description
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.
How to fix
- Linux Linux0d482995f0cdd0302450aa300c684c642d8ab31f, 9e8df087826b9999d1b83b06f5d85675d5a69c9e, db66a30588630c7de30ef033f00daddef69f6ad9, 144ad477c381e2c592b64898d04ab4ce03b32861, e4da1452e10c6472a4bac48dc2f6a35fff1fcd69, 14b1467cfc6630583650f33538174c5a1ec685ab, 035056e07ea65be670284246d9bc62f2f00ff4a3, 092c6a605cbd6414ef499834c2e0da69c2c3388e or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 ≤ v < 0d482995f0cdd0302450aa300c684c642d8ab31f, 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 ≤ v < 9e8df087826b9999d1b83b06f5d85675d5a69c9e, 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 ≤ v < db66a30588630c7de30ef033f00daddef69f6ad9, 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 ≤ v < 144ad477c381e2c592b64898d04ab4ce03b32861, 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 ≤ v < e4da1452e10c6472a4bac48dc2f6a35fff1fcd69, 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 ≤ v < 14b1467cfc6630583650f33538174c5a1ec685ab, 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 ≤ v < 035056e07ea65be670284246d9bc62f2f00ff4a3, 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 ≤ v < 092c6a605cbd6414ef499834c2e0da69c2c3388e, 3.13 | 0d482995f0cdd0302450aa300c684c642d8ab31f, 9e8df087826b9999d1b83b06f5d85675d5a69c9e, db66a30588630c7de30ef033f00daddef69f6ad9, 144ad477c381e2c592b64898d04ab4ce03b32861, e4da1452e10c6472a4bac48dc2f6a35fff1fcd69, 14b1467cfc6630583650f33538174c5a1ec685ab, 035056e07ea65be670284246d9bc62f2f00ff4a3, 092c6a605cbd6414ef499834c2e0da69c2c3388e |
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