{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-98262",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-25T10:25:14.332Z",
        "datePublished": "2026-10-06T08:45:26.118Z",
        "dateUpdated": "2026-10-19T09:16:33.319Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T09:16:33.319Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nata: libahci: clear PxCLBU and PxFBU for AHCI_HFLAG_32BIT_ONLY\n\nA user reported that commit 105c42566a55 (\"ata: ahci: force 32-bit DMA for\nJMicron JMB582/JMB585\") made the JMicron JMB585 unusable on his board.\n\nThe failure is seen as soon as the ahci driver is probed, and booting with\niommu=off does not solve the problem.\n\nLooking at the AHCI specification, PxCLBU and PxFBU are both read only '0'\nfor HBAs that do not support 64-bit addressing.\n\nFor HBAs that do support 64-bit addressing, the registers are read write,\nwith a reset value that is Implementation Specific.\n\nWhen using the AHCI_HFLAG_32BIT_ONLY flag, the HBA does support 64-bit\naddressing, and a 32-bit DMA mask is set by simply clearing HOST_CAP_64.\nThus, in this case, we need to explicitly clear the registers to 0."
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/ata/libahci.c"
                    ],
                    "versions": [
                        {
                            "version": "c7a42156d99bcea7f8173ba7a6034bbaa2ecb77c",
                            "lessThan": "0191c9ff23ef1678dbfb5ad253a2dee92feb5d71",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c7a42156d99bcea7f8173ba7a6034bbaa2ecb77c",
                            "lessThan": "8f510f68208a1f673d7c7234a687be4671490e9c",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c7a42156d99bcea7f8173ba7a6034bbaa2ecb77c",
                            "lessThan": "4719424bb7cb9f20b73986bcb72dd528f0e5c6eb",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c7a42156d99bcea7f8173ba7a6034bbaa2ecb77c",
                            "lessThan": "a5a8b4737f68bbac8aa0685af0c8921e6003c22b",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c7a42156d99bcea7f8173ba7a6034bbaa2ecb77c",
                            "lessThan": "b28a17d4a9bb0aa38b48681c3927b012ba40eabe",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c7a42156d99bcea7f8173ba7a6034bbaa2ecb77c",
                            "lessThan": "b691a3e244278362e552439d6d3ee5a5d3703488",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c7a42156d99bcea7f8173ba7a6034bbaa2ecb77c",
                            "lessThan": "7912ad8fb5233bb8cfe21d50df639c7f4854ff9d",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "c7a42156d99bcea7f8173ba7a6034bbaa2ecb77c",
                            "lessThan": "82e47533221d4746947b74d2e79a478c36c6433a",
                            "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/ata/libahci.c"
                    ],
                    "versions": [
                        {
                            "version": "2.6.22",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.22",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.10.271",
                            "lessThanOrEqual": "5.10.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "5.15.222",
                            "lessThanOrEqual": "5.15.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.1.189",
                            "lessThanOrEqual": "6.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.6.158",
                            "lessThanOrEqual": "6.6.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.12.112",
                            "lessThanOrEqual": "6.12.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.54",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.8",
                            "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": "2.6.22",
                                    "versionEndExcluding": "5.10.271"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.22",
                                    "versionEndExcluding": "5.15.222"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.22",
                                    "versionEndExcluding": "6.1.189"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.22",
                                    "versionEndExcluding": "6.6.158"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.22",
                                    "versionEndExcluding": "6.12.112"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.22",
                                    "versionEndExcluding": "6.18.54"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.22",
                                    "versionEndExcluding": "7.2.8"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.22",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/0191c9ff23ef1678dbfb5ad253a2dee92feb5d71"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8f510f68208a1f673d7c7234a687be4671490e9c"
                },
                {
                    "url": "https://git.kernel.org/stable/c/4719424bb7cb9f20b73986bcb72dd528f0e5c6eb"
                },
                {
                    "url": "https://git.kernel.org/stable/c/a5a8b4737f68bbac8aa0685af0c8921e6003c22b"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b28a17d4a9bb0aa38b48681c3927b012ba40eabe"
                },
                {
                    "url": "https://git.kernel.org/stable/c/b691a3e244278362e552439d6d3ee5a5d3703488"
                },
                {
                    "url": "https://git.kernel.org/stable/c/7912ad8fb5233bb8cfe21d50df639c7f4854ff9d"
                },
                {
                    "url": "https://git.kernel.org/stable/c/82e47533221d4746947b74d2e79a478c36c6433a"
                }
            ],
            "title": "ata: libahci: clear PxCLBU and PxFBU for AHCI_HFLAG_32BIT_ONLY",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}