{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2022-50233",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2025-06-18T10:57:27.432Z",
        "datePublished": "2025-08-09T14:30:51.639Z",
        "dateUpdated": "2026-08-05T08:57:49.382Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-05T08:57:49.382Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: eir: Fix using strlen with hdev->{dev_name,short_name}\n\nBoth dev_name and short_name are not guaranteed to be NULL terminated so\nthis instead use strnlen and then attempt to determine if the resulting\nstring needs to be truncated or not."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                        "baseScore": 7.8,
                        "baseSeverity": "HIGH"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "AV:L - The vulnerable strlen/eir_append paths are reached through the local HCI management socket (HCI_CHANNEL_CONTROL) via SET_LOCAL_NAME or READ_EXT_INFO, not by processing Bluetooth packets from a peer on the radio link.\nAC:L - After bluetoothd sets a typical adapter name of length >= 10, hdev->short_name is filled with 10 non-NUL bytes by memcpy, so strlen reliably reads out of bounds; an attacker can also set this state and trigger it deterministically with no race or attacker-uncontrollable condition.\nPR:L - READ_EXT_INFO is HCI_MGMT_UNTRUSTED so any local user can invoke append_eir_data_to_buf once the common non-NUL-terminated short_name state exists; on Android/desktop, apps or polkit-mediated users can also drive SET_LOCAL_NAME without init-namespace root.\nUI:N - The attacker opens their own HCI control socket and sends the mgmt command themselves; no separate victim action such as mounting a device or accepting a pairing request is required.\nS:U - Impact is host-kernel memory safety failure (OOB read/write and crash) within the same OS authority; this is not a VM escape, IOMMU/DMA bypass, or other cross-boundary compromise.\nC:H - strlen walks past short_name/dev_name into adjacent hci_dev fields, and eir_append_data copies that inflated u8 length into the READ_EXT_INFO response returned to userspace, disclosing more than a few bytes of kernel memory; stack/heap corruption from the same inflated length further enables read primitives.\nI:H - Inflated strlen results are passed into eir_append_data and written into undersized destinations (legacy scan_rsp HCI_MAX_AD_LENGTH=31, or the 512-byte mgmt ext-info stack buffer), producing out-of-bounds writes that can corrupt stack/heap and enable control-flow hijacking.\nA:H - The bugzilla reproducer hits fortify_panic/BUG in append_eir_data_to_buf on SET_LOCAL_NAME, and without FORTIFY the OOB read/write paths cause kernel oops/panic, fully denying availability."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/bluetooth/eir.c",
                        "net/bluetooth/mgmt.c"
                    ],
                    "versions": [
                        {
                            "version": "4c3dbb2c312c9fafbac30d98c523b8b1f3455d78",
                            "lessThan": "dd7b8cdde098cf9f7c8de409b5b7bbb98f97be80",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/bluetooth/eir.c",
                        "net/bluetooth/mgmt.c"
                    ],
                    "versions": [
                        {
                            "version": "4.14",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "4.14",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.0",
                            "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": "4.14",
                                    "versionEndExcluding": "6.0"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/dd7b8cdde098cf9f7c8de409b5b7bbb98f97be80"
                }
            ],
            "title": "Bluetooth: eir: Fix using strlen with hdev->{dev_name,short_name}",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}