nfc: port100: reject frames whose declared length exceeds the received data
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.
CVE-2026-98481
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-98481
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06",
"lessThan": "0d482995f0cdd0302450aa300c684c642d8ab31f",
"versionType": "git"
},
{
"status": "affected",
"version": "562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06",
"lessThan": "9e8df087826b9999d1b83b06f5d85675d5a69c9e",
"versionType": "git"
},
{
"status": "affected",
"version": "562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06",
"lessThan": "db66a30588630c7de30ef033f00daddef69f6ad9",
"versionType": "git"
},
{
"status": "affected",
"version": "562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06",
"lessThan": "144ad477c381e2c592b64898d04ab4ce03b32861",
"versionType": "git"
},
{
"status": "affected",
"version": "562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06",
"lessThan": "e4da1452e10c6472a4bac48dc2f6a35fff1fcd69",
"versionType": "git"
},
{
"status": "affected",
"version": "562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06",
"lessThan": "14b1467cfc6630583650f33538174c5a1ec685ab",
"versionType": "git"
},
{
"status": "affected",
"version": "562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06",
"lessThan": "035056e07ea65be670284246d9bc62f2f00ff4a3",
"versionType": "git"
},
{
"status": "affected",
"version": "562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06",
"lessThan": "092c6a605cbd6414ef499834c2e0da69c2c3388e",
"versionType": "git"
}
],
"programFiles": [
"drivers/nfc/port100.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.13"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.13",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.271",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.222",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.55",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.9",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/nfc/port100.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98481
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38527 · Revision 1
- Added to Heist Feed
- Publisher date