{"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": "2026-08-17T05:41:31.750Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:41:31.750Z"}, "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\u2192ntfs_iget/ntfs_index_iget\u2192ntfs_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\u2014only 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": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "b06730c6af58d3569883f8dd7c36a90aba5ecc0a", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "8b97b302f553a480fb76d2afd53cd6c0635a9dcd", "status": "affected", "versionType": "git"}, {"version": "0", "lessThan": "7.1.5", "status": "affected", "versionType": "semver"}]}, {"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": "7.1.5", "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:*:*:*:*:*:*:*:*", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "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"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/ntfs/index.c", "fs/ntfs/index.h", "fs/ntfs/inode.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "b06730c6af58d3569883f8dd7c36a90aba5ecc0a", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "8b97b302f553a480fb76d2afd53cd6c0635a9dcd", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "7.1.5", "status": "affected", "version": "0", "versionType": "semver"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/ntfs/index.c", "fs/ntfs/index.h", "fs/ntfs/inode.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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."}], "id": "CVE-2026-72204", "lastModified": "2026-08-17T06:18:21.293", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8.4, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.5, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-08-15T06:21:39.090", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8b97b302f553a480fb76d2afd53cd6c0635a9dcd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b06730c6af58d3569883f8dd7c36a90aba5ecc0a"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,b06730c6af58d3569883f8dd7c36a90aba5ecc0a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,8b97b302f553a480fb76d2afd53cd6c0635a9dcd)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,7.1.5)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1.5,*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-15T17:30:11.603106+00:00", "title": "NTFS $INDEX_ROOT header validation defect in Linux kernel", "updated": "2026-08-15T19:45:12.098066+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}