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vuln-cve/data/2026/31xxx/CVE-2026-31729.json
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{
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"cveMetadata": {
"cveId": "CVE-2026-31729",
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"state": "PUBLISHED",
"assignerShortName": "Linux",
"dateReserved": "2026-03-09T15:48:24.134Z",
"datePublished": "2026-05-01T14:14:28.868Z",
"dateUpdated": "2026-11-06T15:32:23.764Z"
},
"containers": {
"cna": {
"providerMetadata": {
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux",
"dateUpdated": "2026-05-11T22:14:37.986Z"
},
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: typec: ucsi: validate connector number in ucsi_notify_common()\n\nThe connector number extracted from CCI via UCSI_CCI_CONNECTOR() is a\n7-bit field (0-127) that is used to index into the connector array in\nucsi_connector_change(). However, the array is only allocated for the\nnumber of connectors reported by the device (typically 2-4 entries).\n\nA malicious or malfunctioning device could report an out-of-range\nconnector number in the CCI, causing an out-of-bounds array access in\nucsi_connector_change().\n\nAdd a bounds check in ucsi_notify_common(), the central point where CCI\nis parsed after arriving from hardware, so that bogus connector numbers\nare rejected before they propagate further."
}
],
"affected": [
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "unaffected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/usb/typec/ucsi/ucsi.c"
],
"versions": [
{
"version": "bdc62f2bae8fb0e8e99574de5232f0a3c54a27df",
"lessThan": "f6dcbf2b024d55549959402f1db6c614e51d52cb",
"status": "affected",
"versionType": "git"
},
{
"version": "bdc62f2bae8fb0e8e99574de5232f0a3c54a27df",
"lessThan": "f4e608fe12b7ac6a4a57176ab0296bb5a110a078",
"status": "affected",
"versionType": "git"
},
{
"version": "bdc62f2bae8fb0e8e99574de5232f0a3c54a27df",
"lessThan": "98429e9ec89a5e3a204112dfaa2dbe6ca28493a0",
"status": "affected",
"versionType": "git"
},
{
"version": "bdc62f2bae8fb0e8e99574de5232f0a3c54a27df",
"lessThan": "d2d8c17ac01a1b1f638ea5d340a884ccc5015186",
"status": "affected",
"versionType": "git"
}
]
},
{
"product": "Linux",
"vendor": "Linux",
"defaultStatus": "affected",
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"programFiles": [
"drivers/usb/typec/ucsi/ucsi.c"
],
"versions": [
{
"version": "5.5",
"status": "affected"
},
{
"version": "0",
"lessThan": "5.5",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.12.81",
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.18.22",
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "6.19.12",
"lessThanOrEqual": "6.19.*",
"status": "unaffected",
"versionType": "semver"
},
{
"version": "7.0",
"lessThanOrEqual": "*",
"status": "unaffected",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"operator": "OR",
"negate": false,
"cpeMatch": [
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.5",
"versionEndExcluding": "6.12.81"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.5",
"versionEndExcluding": "6.18.22"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.5",
"versionEndExcluding": "6.19.12"
},
{
"vulnerable": true,
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionStartIncluding": "5.5",
"versionEndExcluding": "7.0"
}
]
}
]
}
],
"references": [
{
"url": "https://git.kernel.org/stable/c/f6dcbf2b024d55549959402f1db6c614e51d52cb"
},
{
"url": "https://git.kernel.org/stable/c/f4e608fe12b7ac6a4a57176ab0296bb5a110a078"
},
{
"url": "https://git.kernel.org/stable/c/98429e9ec89a5e3a204112dfaa2dbe6ca28493a0"
},
{
"url": "https://git.kernel.org/stable/c/d2d8c17ac01a1b1f638ea5d340a884ccc5015186"
}
],
"title": "usb: typec: ucsi: validate connector number in ucsi_notify_common()",
"x_generator": {
"engine": "bippy-1.2.0"
}
},
"adp": [
{
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"id": "CVE-2026-31729",
"role": "CISA Coordinator",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2026-11-06T15:24:39.973230Z"
}
}
}
],
"title": "CISA ADP Vulnrichment",
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-11-06T15:32:23.764Z"
}
}
]
}
}