{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-72200",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-08-09T03:40:39.911Z",
        "datePublished": "2026-08-15T05:53:58.100Z",
        "dateUpdated": "2026-08-18T06:56:17.738Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-18T06:56:17.738Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nntfs: detect mapping-pairs LCN accumulator overflow\n\nThe NTFS mapping-pairs parser accumulates relative LCN deltas in a\nsigned integer.  A corrupted attribute can drive that addition past\nthe representable range.\n\nOne corrupt runlist shape sets the accumulated LCN to S64_MAX and\nthen adds a delta of 1 in the next mapping-pairs entry.\n\nSigned overflow is undefined and can turn an invalid runlist into a\ndifferent set of physical clusters.\n\nCheck the LCN addition for overflow before storing the next run."
                }
            ],
            "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 - Legacy NTFS is NFS-exportable (ntfs_export_ops) and commonly served via ksmbd; remote SMB/NFS reads on an exported NTFS mount reach ntfs_mapping_pairs_decompress() through VFS read/iomap and ntfs_map_runlist() without local shell access.\nAC:L - An attacker fully controls crafted on-disk mapping pairs offline (e.g., drive LCN to S64_MAX then add +1) and can reliably trigger decompression on mount or the next attribute access that maps the runlist; no races or victim-specific layout are required.\nPR:N - Triggering decompression needs only permission to cause server-side parsing of mounted NTFS metadata (e.g., guest/anonymous SMB or permissive NFS read, or unprivileged local open/read on an already-mounted volume), not init-namespace root or CAP_SYS_ADMIN at trigger time.\nUI:N - After the volume is mounted/exported, exploitation requires only normal remote or local filesystem read/open operations on files whose non-resident attributes carry the poisoned mapping pairs; no additional victim mount dialogs, USB insertion, or other user actions are needed during the attack.\nS:U - Impact stays within the kernel/host context (runlist corruption and misdirected block I/O on the mounted volume); it does not cross a VM, container, or IOMMU boundary to another security authority.\nC:H - Signed LCN accumulator overflow (undefined behavior) yields attacker-controlled cluster mappings, so subsequent reads can be directed to arbitrary on-volume clusters and disclose other files' data and metadata beyond the accessed object.\nI:H - Corrupted LCN values misdirect kernel writeback and allocation I/O to arbitrary physical clusters on the volume, enabling cross-file/metadata tampering and further corruption exploitable for broader integrity compromise.\nA:H - Misdirected cluster I/O and corrupt runlists cause mount/read/write failures, can destroy critical structures like $MFT, and repeated remote access can deny service to the host or exported filesystem."
                        }
                    ]
                }
            ],
            "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": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
                            "lessThan": "7fb64788812d137b37f6d8724e1e41c624c1e814",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
                            "lessThan": "ec4f061f2219e0f0c6465d56d0380bf749235a53",
                            "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": "2.6.12",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "2.6.12",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.1.5",
                            "lessThanOrEqual": "7.1.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.2",
                            "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": "2.6.12",
                                    "versionEndExcluding": "7.1.5"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "2.6.12",
                                    "versionEndExcluding": "7.2"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/7fb64788812d137b37f6d8724e1e41c624c1e814"
                },
                {
                    "url": "https://git.kernel.org/stable/c/ec4f061f2219e0f0c6465d56d0380bf749235a53"
                }
            ],
            "title": "ntfs: detect mapping-pairs LCN accumulator overflow",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}