{
    "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": "2026-05-11T22:14:37.986Z"
    },
    "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"
            }
        }
    }
}