142 lines
7.6 KiB
JSON
142 lines
7.6 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-72204",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-08-09T03:40:39.912Z",
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"datePublished": "2026-08-15T05:54:01.070Z",
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"dateUpdated": "2026-08-18T06:56:23.160Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-18T06:56:23.160Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 8.4,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"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."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"fs/ntfs/index.c",
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"fs/ntfs/index.h",
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"fs/ntfs/inode.c"
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],
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"versions": [
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{
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"version": "0a8ac0c1fa0b99a5b29002bc7f232ed7eafddef0",
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"lessThan": "b06730c6af58d3569883f8dd7c36a90aba5ecc0a",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "0a8ac0c1fa0b99a5b29002bc7f232ed7eafddef0",
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"lessThan": "8b97b302f553a480fb76d2afd53cd6c0635a9dcd",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"fs/ntfs/index.c",
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"fs/ntfs/index.h",
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"fs/ntfs/inode.c"
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],
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"versions": [
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{
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"version": "7.1",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "7.1",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.1.5",
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"lessThanOrEqual": "7.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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"operator": "OR",
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"negate": false,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "7.1",
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"versionEndExcluding": "7.1.5"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "7.1",
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/b06730c6af58d3569883f8dd7c36a90aba5ecc0a"
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},
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{
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"url": "https://git.kernel.org/stable/c/8b97b302f553a480fb76d2afd53cd6c0635a9dcd"
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}
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],
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"title": "ntfs: centalize $INDEX_ROOT header validation",
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