CVE-2026-98481

/// Technical 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.

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References