CVE-2026-98481

nfc: port100: reject frames whose declared length exceeds the received data

State: Published
Severity: Not scored
Published: Oct 18, 2026
Updated: Oct 19, 2026
Reserved: Sep 25, 2026

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 to before 0d482995f0cdd0302450aa300c684c642d8ab31fAffected 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 to before 9e8df087826b9999d1b83b06f5d85675d5a69c9eAffected 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 to before db66a30588630c7de30ef033f00daddef69f6ad9Affected 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 to before 144ad477c381e2c592b64898d04ab4ce03b32861Affected 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 to before e4da1452e10c6472a4bac48dc2f6a35fff1fcd69Affected 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 to before 14b1467cfc6630583650f33538174c5a1ec685abAffected 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 to before 035056e07ea65be670284246d9bc62f2f00ff4a3Affected 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 to before 092c6a605cbd6414ef499834c2e0da69c2c3388eAffected
LinuxLinux	3.13Affected before 3.13Not affected 5.10.271 through 5.10.Not affected 5.15.222 through 5.15.Not affected 6.1.189 through 6.1.Not affected 6.6.158 through 6.6.Not affected 6.12.112 through 6.12.Not affected 6.18.55 through 6.18.Not affected 7.2.9 through 7.2.*Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 to before 0d482995f0cdd0302450aa300c684c642d8ab31fAffected
562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 to before 9e8df087826b9999d1b83b06f5d85675d5a69c9eAffected
562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 to before db66a30588630c7de30ef033f00daddef69f6ad9Affected
562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 to before 144ad477c381e2c592b64898d04ab4ce03b32861Affected
562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 to before e4da1452e10c6472a4bac48dc2f6a35fff1fcd69Affected
562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 to before 14b1467cfc6630583650f33538174c5a1ec685abAffected
562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 to before 035056e07ea65be670284246d9bc62f2f00ff4a3Affected
562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 to before 092c6a605cbd6414ef499834c2e0da69c2c3388eAffected

LinuxLinux

3.13Affected
before 3.13Not affected
5.10.271 through 5.10.*Not affected
5.15.222 through 5.15.*Not affected
6.1.189 through 6.1.*Not affected
6.6.158 through 6.6.*Not affected
6.12.112 through 6.12.*Not affected
6.18.55 through 6.18.*Not affected
7.2.9 through 7.2.*Not affected
7.3 and laterNot affected

References

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