{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-90254",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-11T19:38:34.796Z",
        "datePublished": "2026-09-17T16:07:54.123Z",
        "dateUpdated": "2026-10-19T09:00:30.990Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T09:00:30.990Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_sync: free the advertising instance on the failure and cancel paths\n\nadv_timeout_expire() hands a kmalloc()ed instance byte to\nhci_cmd_sync_queue() with a NULL destroy callback, and only\nadv_timeout_expire_sync() frees it. That leaks on two paths:\n\n - the return value is not checked, and hci_cmd_sync_queue() does not\n   take ownership when it fails (-ENETDOWN, -ENODEV, -ENOMEM);\n\n - a cancelled entry is not released, as _hci_cmd_sync_cancel_entry()\n   does not free entry->data when there is no destroy callback.\n   hci_cmd_sync_clear() cancels every pending entry when the controller\n   is unregistered.\n\nFree the buffer from a destroy callback, and in the caller when the entry\ncould not be queued at all."
                }
            ],
            "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": "c249ea9b4309cf3250c5bbb42a05d38d0ed9071c",
                            "lessThan": "c2019224a766245b7db39d87fdfe84c3fdc879d9",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c249ea9b4309cf3250c5bbb42a05d38d0ed9071c",
                            "lessThan": "193182c6467f508a8a61d5db506d796ffed6eee6",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c249ea9b4309cf3250c5bbb42a05d38d0ed9071c",
                            "lessThan": "2e3d827cd56865c14f6ca118bbccd7801091fb21",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c249ea9b4309cf3250c5bbb42a05d38d0ed9071c",
                            "lessThan": "9c3b6c1413bd0b4993642d987616331f84d9b7f5",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c249ea9b4309cf3250c5bbb42a05d38d0ed9071c",
                            "lessThan": "bb5ca1cc7744c41c59002bd6523714a685ae6595",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c249ea9b4309cf3250c5bbb42a05d38d0ed9071c",
                            "lessThan": "120d8dc042e3d45073bb6e50ee7b058a0b182627",
                            "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": "6.1",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.1",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.188",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.157",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.110",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.52",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.6",
                            "lessThanOrEqual": "7.2.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.3",
                            "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": "6.1",
                                    "versionEndExcluding": "6.1.188"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.1",
                                    "versionEndExcluding": "6.6.157"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.1",
                                    "versionEndExcluding": "6.12.110"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.1",
                                    "versionEndExcluding": "6.18.52"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.1",
                                    "versionEndExcluding": "7.2.6"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.1",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/c2019224a766245b7db39d87fdfe84c3fdc879d9"
                },
                {
                    "url": "https://git.kernel.org/stable/c/193182c6467f508a8a61d5db506d796ffed6eee6"
                },
                {
                    "url": "https://git.kernel.org/stable/c/2e3d827cd56865c14f6ca118bbccd7801091fb21"
                },
                {
                    "url": "https://git.kernel.org/stable/c/9c3b6c1413bd0b4993642d987616331f84d9b7f5"
                },
                {
                    "url": "https://git.kernel.org/stable/c/bb5ca1cc7744c41c59002bd6523714a685ae6595"
                },
                {
                    "url": "https://git.kernel.org/stable/c/120d8dc042e3d45073bb6e50ee7b058a0b182627"
                }
            ],
            "title": "Bluetooth: hci_sync: free the advertising instance on the failure and cancel paths",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}