{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-72204",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-08-09T03:40:39.912Z",
        "datePublished": "2026-08-15T05:54:01.070Z",
        "dateUpdated": "2026-08-18T06:56:23.160Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-18T06:56:23.160Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nntfs: centalize $INDEX_ROOT header validation\n\nAdd a dedicated helper to perform stricter validation of $INDEX_ROOT and\nuse it for both directory inodes and named index inodes. This keeps the\nroot size and header geometry checks consistent across both read paths."
                }
            ],
            "metrics": [
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                        "baseScore": 8.4,
                        "baseSeverity": "HIGH"
                    },
                    "scenarios": [
                        {
                            "lang": "en",
                            "value": "AV:L - The bug is reached only when the legacy fs/ntfs driver parses a crafted $INDEX_ROOT during mount or local VFS inode load (ntfs_fill_super→ntfs_iget/ntfs_index_iget→ntfs_read_locked_inode or ntfs_read_locked_index_inode); there is no network-facing handler.\nAC:L - The attacker fully controls on-disk $INDEX_ROOT header geometry (value_length, entries_offset, index_length, allocated_size), so the missing checks and resulting out-of-bounds access in ntfs_lookup_inode_by_name are reliably triggerable with no race or uncontrollable layout dependency.\nPR:N - The attacker needs no account or capabilities on the victim—only a malicious NTFS image presented via USB, loop device, or dual-boot partition that root, udisks2, or automount loads on their behalf.\nUI:N - On kiosks, desktops, and automotive/embedded systems that automount removable NTFS media, inserting the device alone runs ntfs_fill_super and inode read of directory/index metadata with no further deliberate victim action beyond presenting the volume.\nS:U - Impact is confined to kernel heap parsing within the same OS security authority; this is not a VM escape, IOMMU bypass, or cross-sandbox boundary crossing.\nC:H - Without full header validation, crafted entries_offset/index_length pairs let ntfs_lookup_inode_by_name and inode-read paths read past the resident $INDEX_ROOT value into adjacent kmalloc MFT/slab memory, enabling unbounded kernel information disclosure.\nI:H - The same unchecked header fields drive index entry walks and later RW index memmove/insert paths on a writable mount; attacker-controlled geometry can corrupt heap metadata beyond the resident value, yielding a write primitive suitable for privilege escalation.\nA:H - Out-of-bounds reads of index entries and header fields from malformed $INDEX_ROOT during mount or directory access can fault on unmapped memory and oops/panic the kernel, fully denying availability."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "fs/ntfs/index.c",
                        "fs/ntfs/index.h",
                        "fs/ntfs/inode.c"
                    ],
                    "versions": [
                        {
                            "version": "0a8ac0c1fa0b99a5b29002bc7f232ed7eafddef0",
                            "lessThan": "b06730c6af58d3569883f8dd7c36a90aba5ecc0a",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "0a8ac0c1fa0b99a5b29002bc7f232ed7eafddef0",
                            "lessThan": "8b97b302f553a480fb76d2afd53cd6c0635a9dcd",
                            "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/index.c",
                        "fs/ntfs/index.h",
                        "fs/ntfs/inode.c"
                    ],
                    "versions": [
                        {
                            "version": "7.1",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "7.1",
                            "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": "7.1",
                                    "versionEndExcluding": "7.1.5"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "7.1",
                                    "versionEndExcluding": "7.2"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/b06730c6af58d3569883f8dd7c36a90aba5ecc0a"
                },
                {
                    "url": "https://git.kernel.org/stable/c/8b97b302f553a480fb76d2afd53cd6c0635a9dcd"
                }
            ],
            "title": "ntfs: centalize $INDEX_ROOT header validation",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
        }
    }
}