{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-23443",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-01-13T15:37:46.018Z",
        "datePublished": "2026-04-03T15:15:27.698Z",
        "dateUpdated": "2026-05-11T22:07:00.396Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-05-11T22:07:00.396Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nACPI: processor: Fix previous acpi_processor_errata_piix4() fix\n\nAfter commi f132e089fe89 (\"ACPI: processor: Fix NULL-pointer dereference\nin acpi_processor_errata_piix4()\"), device pointers may be dereferenced\nafter dropping references to the device objects pointed to by them,\nwhich may cause a use-after-free to occur.\n\nMoreover, debug messages about enabling the errata may be printed\nif the errata flags corresponding to them are unset.\n\nAddress all of these issues by moving message printing to the points\nin the code where the errata flags are set."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/acpi/acpi_processor.c"
                    ],
                    "versions": [
                        {
                            "version": "06724a60cfa9767ea90b0f5d3dfb5cdd251b64f5",
                            "lessThan": "68408e8f9e366ad9850a66ac65cb569f13bf6cd4",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "ad86ac604f8391c0212a91412d4f764c7a85f254",
                            "lessThan": "2e369ba9eb7b8a06e9cc35a3e7fe73e59272f8c2",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "01e8751b37a366b1ca561add0042f2ceb18c03bf",
                            "lessThan": "edf4c2aaee08e8fd503fbae705c801e92a0b55d7",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "b803811485ac0b2f774b6bf3abc8b999ba3b7033",
                            "lessThan": "e0c470049344e9346fff79d7e2362212c216665e",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "29f60d3d06818d40118a30d663231f027ae87a05",
                            "lessThan": "98473309a36acc271009b85e0bb53a4c0dddf5c2",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0398b641be2b66c2fc7e0163c606ef19372e7ad5",
                            "lessThan": "8583f62259e1b315d5239371adfb36939cdab741",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "f132e089fe89cadc2098991f0a3cb05c3f824ac6",
                            "lessThan": "bf504b229cb8d534eccbaeaa23eba34c05131e25",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/acpi/acpi_processor.c"
                    ],
                    "versions": [
                        {
                            "version": "5.15.202",
                            "lessThan": "5.15.203",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.165",
                            "lessThan": "6.1.167",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.128",
                            "lessThan": "6.6.130",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.75",
                            "lessThan": "6.12.78",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.16",
                            "lessThan": "6.18.20",
                            "status": "affected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.6",
                            "lessThan": "6.19.10",
                            "status": "affected",
                            "versionType": "semver"
                        }
                    ]
                }
            ],
            "cpeApplicability": [
                {
                    "nodes": [
                        {
                            "operator": "OR",
                            "negate": false,
                            "cpeMatch": [
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "5.15.202",
                                    "versionEndExcluding": "5.15.203"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.1.165",
                                    "versionEndExcluding": "6.1.167"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.6.128",
                                    "versionEndExcluding": "6.6.130"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.12.75",
                                    "versionEndExcluding": "6.12.78"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.18.16",
                                    "versionEndExcluding": "6.18.20"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.19.6",
                                    "versionEndExcluding": "6.19.10"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/68408e8f9e366ad9850a66ac65cb569f13bf6cd4"
                },
                {
                    "url": "https://git.kernel.org/stable/c/2e369ba9eb7b8a06e9cc35a3e7fe73e59272f8c2"
                },
                {
                    "url": "https://git.kernel.org/stable/c/edf4c2aaee08e8fd503fbae705c801e92a0b55d7"
                },
                {
                    "url": "https://git.kernel.org/stable/c/e0c470049344e9346fff79d7e2362212c216665e"
                },
                {
                    "url": "https://git.kernel.org/stable/c/98473309a36acc271009b85e0bb53a4c0dddf5c2"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8583f62259e1b315d5239371adfb36939cdab741"
                },
                {
                    "url": "https://git.kernel.org/stable/c/bf504b229cb8d534eccbaeaa23eba34c05131e25"
                }
            ],
            "title": "ACPI: processor: Fix previous acpi_processor_errata_piix4() fix",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}