{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-92521",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-16T12:21:13.874Z",
        "datePublished": "2026-09-17T16:10:28.144Z",
        "dateUpdated": "2026-10-19T09:04:27.575Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T09:04:27.575Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nACPI: PCI: Clear driver_data on all paths that free the acpi_pci_root\n\nacpi_pci_root_add() assigns the freshly allocated root to\ndevice->driver_data before dmar_device_add() and pci_acpi_scan_root().\nBoth failure paths reach the end: label where root is kfree()'d, but\nonly the pci_acpi_scan_root() path clears driver_data first.\n\nWhen dmar_device_add() fails during a hot-add, root is freed while\ndevice->driver_data still points at it.  The ACPI core does not clear\ndriver_data on attach failure, so a later acpi_pci_find_root() call may\ndereference this dangling pointer.\n\nacpi_pci_root_remove() has the same problem: it frees root without\nclearing device->driver_data, leaving a dangling pointer behind after\nthe root bridge is removed.\n\nMove the NULL assignment to the shared end: label so every error path in\nacpi_pci_root_add() clears driver_data before freeing root, and clear it\nin acpi_pci_root_remove() as well, so the object is never left reachable\nthrough driver_data after being freed."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/acpi/pci_root.c"
                    ],
                    "versions": [
                        {
                            "version": "db89b4f0dbab837d0f3de2c3e9427a8d5393afa3",
                            "lessThan": "321bb0eb1486a0d575f02e24e3f4170e408c2f51",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "db89b4f0dbab837d0f3de2c3e9427a8d5393afa3",
                            "lessThan": "3c1e8a14f9d06c1ed6f3e4bd2d283a62079109e2",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "db89b4f0dbab837d0f3de2c3e9427a8d5393afa3",
                            "lessThan": "a285fa3780c768dcc51c76768707d099a2cc611d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "db89b4f0dbab837d0f3de2c3e9427a8d5393afa3",
                            "lessThan": "6aaf6dbf54fdfae096f3f90a79e9614e46579280",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "db89b4f0dbab837d0f3de2c3e9427a8d5393afa3",
                            "lessThan": "70cf773cca30a10b4964c24520a71279c974b899",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "db89b4f0dbab837d0f3de2c3e9427a8d5393afa3",
                            "lessThan": "3eee4c21931dc048ce63b86809f04e4e6f0dcad5",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "db89b4f0dbab837d0f3de2c3e9427a8d5393afa3",
                            "lessThan": "6e11ac626f9f9fc3a2ed27dfa44ccbe5fb762217",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "db89b4f0dbab837d0f3de2c3e9427a8d5393afa3",
                            "lessThan": "8a742141f7ab84975aa758b775567ef4740ef0cf",
                            "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/acpi/pci_root.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.28",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.28",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.270",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.221",
                            "lessThanOrEqual": "5.15.*",
                            "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": "2.6.28",
                                    "versionEndExcluding": "5.10.270"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.28",
                                    "versionEndExcluding": "5.15.221"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.28",
                                    "versionEndExcluding": "6.1.188"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.28",
                                    "versionEndExcluding": "6.6.157"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.28",
                                    "versionEndExcluding": "6.12.110"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.28",
                                    "versionEndExcluding": "6.18.52"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.28",
                                    "versionEndExcluding": "7.2.6"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.28",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/321bb0eb1486a0d575f02e24e3f4170e408c2f51"
                },
                {
                    "url": "https://git.kernel.org/stable/c/3c1e8a14f9d06c1ed6f3e4bd2d283a62079109e2"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a285fa3780c768dcc51c76768707d099a2cc611d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/6aaf6dbf54fdfae096f3f90a79e9614e46579280"
                },
                {
                    "url": "https://git.kernel.org/stable/c/70cf773cca30a10b4964c24520a71279c974b899"
                },
                {
                    "url": "https://git.kernel.org/stable/c/3eee4c21931dc048ce63b86809f04e4e6f0dcad5"
                },
                {
                    "url": "https://git.kernel.org/stable/c/6e11ac626f9f9fc3a2ed27dfa44ccbe5fb762217"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8a742141f7ab84975aa758b775567ef4740ef0cf"
                }
            ],
            "title": "ACPI: PCI: Clear driver_data on all paths that free the acpi_pci_root",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}