{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-89613",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-09-11T19:38:34.735Z",
        "datePublished": "2026-09-11T19:45:14.081Z",
        "dateUpdated": "2026-10-19T08:49:45.874Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-10-19T08:49:45.874Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nntfs: reject invalid empty mapping pairs\n\nReject an attribute with empty mapping pairs if it has inconsistent\nhighest VCN and size."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                        "baseScore": 9.8,
                        "baseSeverity": "CRITICAL"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "AV:N - fs/ntfs registers ntfs_export_ops, so nfsd/ksmbd VFS reads on an exported NTFS volume reach ntfs_map_runlist()->ntfs_mapping_pairs_decompress() for crafted on-disk mapping pairs without local shell access.\nAC:L - The attacker fully controls the empty mapping-pairs terminator, lowest/highest VCN, and allocated/data/initialized sizes; decompressing that attribute and merging the resulting degenerate runlist is deterministic with no race or victim-specific layout.\nPR:N - Triggering the decoder needs only permission to cause server-side parsing of mounted NTFS metadata (guest/anonymous SMB or a permissive NFS export, or an unprivileged open/read on an already-mounted volume), not init-namespace root or CAP_SYS_ADMIN at trigger time.\nUI:N - After the crafted volume is mounted and exported, ordinary remote or local reads decompress the invalid empty mapping pairs and enter the merge path; no extra victim mount dialog, USB insertion, or confirmation is required during the attack.\nS:U - Heap corruption of the in-memory runlist and subsequent misdirected cluster I/O remain in the host kernel security domain and do not cross a VM, container, or IOMMU boundary to another authority.\nC:H - Merging the degenerate unmapped runlist computes a negative source size and indexes src+ssize-1 / dst[marker] outside the allocation, an unbounded kernel heap out-of-bounds read that can disclose adjacent objects.\nI:H - The same merge performs out-of-bounds runlist writes via marker/loc arithmetic with ssize<0 and later I/O using corrupted VCN/LCN mappings, a kernel heap write primitive sufficient for control-flow hijacking.\nA:H - WARN_ON on an entirely unmapped source runlist, heap out-of-bounds access, and corrupted runlist walks oops or panic the kernel, fully denying availability even when exploitation is not completed."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/ntfs/runlist.c"
                    ],
                    "versions": [
                        {
                            "version": "11ccc9107dc460de28af90fac1f42404d9802735",
                            "lessThan": "b0cc6dbc655e037251874b3e0dd1a760dcf29007",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "11ccc9107dc460de28af90fac1f42404d9802735",
                            "lessThan": "766062a82e1ce4087c7dc077224144dfd34b3661",
                            "status": "affected",
                            "versionType": "git"
                        }
                    ]
                },
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "affected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/ntfs/runlist.c"
                    ],
                    "versions": [
                        {
                            "version": "7.1",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "7.1",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2.4",
                            "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": "7.1",
                                    "versionEndExcluding": "7.2.4"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "7.1",
                                    "versionEndExcluding": "7.3"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/b0cc6dbc655e037251874b3e0dd1a760dcf29007"
                },
                {
                    "url": "https://git.kernel.org/stable/c/766062a82e1ce4087c7dc077224144dfd34b3661"
                }
            ],
            "title": "ntfs: reject invalid empty mapping pairs",
            "x_generator": {
                "engine": "bippy-1.2.0"
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        }
    }
}