GHSA-76WJ-CCJF-8Q4P
Vulnerability from github – Published: 2026-10-18 18:31 – Updated: 2026-10-18 18:31In 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.
{
"affected": [],
"aliases": [
"CVE-2026-98481"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-10-18T16:16:58Z",
"severity": null
},
"details": "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(), which checksums le16_to_cpu(frame-\u003edatalen)\nbytes of frame-\u003edata. datalen is a 16-bit field supplied by the device\nand is never checked against the number of bytes actually received\n(urb-\u003eactual_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.",
"id": "GHSA-76wj-ccjf-8q4p",
"modified": "2026-10-18T18:31:50Z",
"published": "2026-10-18T18:31:50Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98481"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/035056e07ea65be670284246d9bc62f2f00ff4a3"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/092c6a605cbd6414ef499834c2e0da69c2c3388e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0d482995f0cdd0302450aa300c684c642d8ab31f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/144ad477c381e2c592b64898d04ab4ce03b32861"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/14b1467cfc6630583650f33538174c5a1ec685ab"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9e8df087826b9999d1b83b06f5d85675d5a69c9e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/db66a30588630c7de30ef033f00daddef69f6ad9"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e4da1452e10c6472a4bac48dc2f6a35fff1fcd69"
}
],
"schema_version": "1.4.0",
"severity": []
}
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