{"id":"CVE-2026-98481","title":"nfc: port100: reject frames whose declared length exceeds the received data","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: port100: reject frames whose declared length exceeds the received data\n\nport100_recv_response() passes the URB transfer buffer to\nport100_rx_frame_is_valid(), whic…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 < 0d482995f0cdd0302450aa300c684c642d8ab31f","Linux >= 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 < 9e8df087826b9999d1b83b06f5d85675d5a69c9e","Linux >= 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 < db66a30588630c7de30ef033f00daddef69f6ad9","Linux >= 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 < 144ad477c381e2c592b64898d04ab4ce03b32861","Linux >= 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 < e4da1452e10c6472a4bac48dc2f6a35fff1fcd69","Linux >= 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 < 14b1467cfc6630583650f33538174c5a1ec685ab","Linux >= 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 < 035056e07ea65be670284246d9bc62f2f00ff4a3","Linux >= 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 < 092c6a605cbd6414ef499834c2e0da69c2c3388e","Linux 3.13"],"published":"2026-10-18","updated":"2026-10-18","sourceUpdated":"2026-10-18T15:15:55.360Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98481","references":[{"url":"https://git.kernel.org/stable/c/0d482995f0cdd0302450aa300c684c642d8ab31f"},{"url":"https://git.kernel.org/stable/c/9e8df087826b9999d1b83b06f5d85675d5a69c9e"},{"url":"https://git.kernel.org/stable/c/db66a30588630c7de30ef033f00daddef69f6ad9"},{"url":"https://git.kernel.org/stable/c/144ad477c381e2c592b64898d04ab4ce03b32861"},{"url":"https://git.kernel.org/stable/c/e4da1452e10c6472a4bac48dc2f6a35fff1fcd69"},{"url":"https://git.kernel.org/stable/c/14b1467cfc6630583650f33538174c5a1ec685ab"},{"url":"https://git.kernel.org/stable/c/035056e07ea65be670284246d9bc62f2f00ff4a3"},{"url":"https://git.kernel.org/stable/c/092c6a605cbd6414ef499834c2e0da69c2c3388e"}],"tags":["cve.org"],"ingestedAt":"2026-10-18T15:45:12.296Z","slug":"CVE-2026-98481","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnfc: port100: reject frames whose declared length exceeds the received data\n\nport100_recv_response() passes the URB transfer buffer to\nport100_rx_frame_is_valid(), which checksums le16_to_cpu(frame->datalen)\nbytes of frame->data. datalen is a 16-bit field supplied by the device\nand is never checked against the number of bytes actually received\n(urb->actual_length), so a device reporting a datalen larger than the\nreceived frame makes port100_data_checksum() read out of bounds past the\ntransfer buffer.\n\nReject a response whose declared frame size does not fit the received\nlength before validating it.\n\nFound by 0sec (https://0sec.ai) using automated source analysis; the\nmissing bound is evident from source. Compile-tested.\n\n## Affected\n\n- `Linux >= 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 < 0d482995f0cdd0302450aa300c684c642d8ab31f`\n- `Linux >= 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 < 9e8df087826b9999d1b83b06f5d85675d5a69c9e`\n- `Linux >= 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 < db66a30588630c7de30ef033f00daddef69f6ad9`\n- `Linux >= 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 < 144ad477c381e2c592b64898d04ab4ce03b32861`\n- `Linux >= 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 < e4da1452e10c6472a4bac48dc2f6a35fff1fcd69`\n- `Linux >= 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 < 14b1467cfc6630583650f33538174c5a1ec685ab`\n- `Linux >= 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 < 035056e07ea65be670284246d9bc62f2f00ff4a3`\n- `Linux >= 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06 < 092c6a605cbd6414ef499834c2e0da69c2c3388e`\n- `Linux 3.13`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}