{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-68390",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-07-30T09:28:09.388Z",
        "datePublished": "2026-08-10T12:04:09.373Z",
        "dateUpdated": "2026-08-17T05:04:37.940Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-17T05:04:37.940Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: hold hdev->lock for hci_conn_params lookups\n\nhci_conn_params_lookup requires hdev->lock be held, otherwise the list\niteration or param access is not safe.\n\nHold hdev->lock for params lookups in hci_sync."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                        "baseScore": 8.8,
                        "baseSeverity": "HIGH"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "AV:A - The vulnerable hci_sync paths are Bluetooth LE host-stack code: hci_le_create_conn_sync is queued autonomously from check_pending_le_conn() on incoming LE advertising reports, and the racing hci_conn_params_del() side is driven by LE connection-complete/failure and disconnect events, so a device in radio range drives the bug over the air.\nAC:L - The attacker controls both sides of the race — repeated LE connect/disconnect and PA-sync setup/teardown cycles queue the cmd_sync work while the event workqueue concurrently runs hci_conn_params_del()/hci_conn_del() under hdev->lock — and the sleeping hci_pause_advertising_sync() right before the unlocked lookup widens the window, so it can be retried until won.\nPR:N - No credentials, pairing, or local account are needed: the host stack queues hci_le_create_conn_sync automatically in response to advertising reports from a device on the accept list, and the freeing side is triggered by connection-complete/failure events the peer controls.\nUI:N - Background LE scanning, auto-connect, accept-list programming, and connection-failure cleanup are performed autonomously by the kernel whenever connection state changes; no victim action such as pairing confirmation or opening a device is required.\nS:U - The corruption is confined to kernel heap objects owned by the Bluetooth subsystem within the same security authority; no hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - hci_conn_params_lookup() iterates and dereferences a list entry that another CPU may have list_del()'d and kfree()'d, and hci_le_pa_create_sync() reads le->dst/le->handle from a possibly freed hci_conn; a groomed slab yields an arbitrary read primitive, and the stale values are copied into the outgoing HCI command, leaking kernel heap contents over the air.\nI:H - This is a classic slab use-after-free on hci_conn_params/hci_conn: reclaiming the freed object with attacker-controlled data gives write and control-flow primitives, and the corrupted values are written into conn->le_conn_* fields and the HCI command payload, so kernel memory corruption and privilege escalation are leverageable.\nA:H - Walking le_conn_params without hdev->lock while an entry is removed dereferences LIST_POISON1 or freed memory, producing slab-use-after-free KASAN splats, oopses, or a kernel panic in the Bluetooth workqueues."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "net/bluetooth/hci_sync.c"
                    ],
                    "versions": [
                        {
                            "version": "c530569adc19b5f0c62955de41f067bad34e3fe0",
                            "lessThan": "8d892bec1dd134761cabec6ba23fe315d0f20f98",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c530569adc19b5f0c62955de41f067bad34e3fe0",
                            "lessThan": "c363202ec841df36421ec280eea3d5f94f556143",
                            "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/hci_sync.c"
                    ],
                    "versions": [
                        {
                            "version": "6.19",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.19",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.6",
                            "lessThanOrEqual": "7.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2",
                            "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": "6.19",
                                    "versionEndExcluding": "7.1.6"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.19",
                                    "versionEndExcluding": "7.2"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/8d892bec1dd134761cabec6ba23fe315d0f20f98"
                },
                {
                    "url": "https://git.kernel.org/stable/c/c363202ec841df36421ec280eea3d5f94f556143"
                }
            ],
            "title": "Bluetooth: hci_sync: hold hdev->lock for hci_conn_params lookups",
            "x_generator": {
                "engine": "bippy-1.2.0"
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        }
    }
}