CVE-2026-72198

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-72198", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.911Z", "datePublished": "2026-08-15T05:53:56.782Z", "dateUpdated": "2026-10-30T12:28:54.419Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:28:54.419Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nntfs: reject non-resident records for resident-only attributes\n\nThe shared lookup-time attribute validator rejects non-resident\n$FILE_NAME and $VOLUME_NAME records because their formats require\nresident values and callers handle returned records as resident\nattributes. Other resident-only attribute types still pass through the\ngeneric non-resident mapping-pairs checks.\n\nThat leaves real resident/non-resident union confusion paths. Inode load\nlooks up $STANDARD_INFORMATION and then reads data.resident.value_offset\nwithout checking a->non_resident. ntfs_inode_sync_standard_information()\ndoes the same when updating the standard information value.\nntfs_write_volume_flags() also looks up $VOLUME_INFORMATION and reads\ndata.resident.value_offset directly. $INDEX_ROOT callers in dir.c and\nindex.c depend on the same lookup contract before consuming the resident\nindex root value.\n\nReject non-resident records for all resident-only attribute types in the\nshared validator. Keep the existing $FILE_NAME and $VOLUME_NAME behavior,\nbut factor it through a helper and extend it to\n$STANDARD_INFORMATION, $OBJECT_ID, $VOLUME_INFORMATION, $INDEX_ROOT, and\n$EA_INFORMATION. For $OBJECT_ID and $EA_INFORMATION this is contract\nhardening for resident-only formats; this patch only rejects the\nnon-resident form and does not add new resident value validation for\nthose types."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The bug is in the in-kernel NTFS filesystem driver parsing on-disk MFT attribute records from a block device; exploitation requires mounting or accessing a crafted NTFS image via local syscalls (mount/fsopen), not remote network packet handling.\nAC:L - An attacker fully controls crafted NTFS metadata and can reliably mark resident-only attributes (e.g. $STANDARD_INFORMATION) as non-resident with attacker-chosen union fields that pass generic non-resident validation, deterministically triggering resident/non-resident type confusion.\nPR:L - Reaching the vulnerable ntfs_attr_lookup/ntfs_read_locked_inode paths requires mounting the filesystem (CAP_SYS_ADMIN), which unprivileged attackers can obtain in a user+mount namespace on typical Linux configurations without real init-namespace root.\nUI:N - No victim interaction is required when the attacker mounts their own malicious NTFS image (e.g. loop device) inside a user namespace; inode load and writeback then parse the poisoned attributes automatically during normal filesystem operations.\nS:U - Exploitation corrupts kernel memory and can yield local privilege escalation within the same kernel/host security boundary; it does not inherently cross VM, container, or IOMMU isolation boundaries on its own.\nC:H - Callers such as ntfs_read_locked_inode() dereference data.resident.value_offset on attributes validated as non-resident, interpreting non-resident union bytes as a resident offset and performing out-of-bounds reads of MFT/kernel memory controllable by the attacker.\nI:H - Write paths including ntfs_inode_sync_standard_information() and ntfs_write_volume_flags() use the same misinterpreted resident offset to write standard-information and volume-information fields, giving attacker-influenced out-of-bounds kernel memory writes and type-confusion primitives.\nA:H - Malformed resident/non-resident metadata can cause kernel oops/panics during inode load, directory traversal, or inode sync on mount and routine file activity, and memory corruption can crash or hang the system even before full exploitation."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/ntfs/attrib.c"], "versions": [{"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "b06b4fc2138ded8ee0b3dc602991ff6dbb10dd0a", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "6626fb859f4c4772f2f59751d23937716e03f98f", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "7ffa8f3d30236e0ab897c30bdb01224ff1fe1c89", "status": "affected", "versionType": "git"}, {"version": "1e9ea7e04472d4e5e12e58c881eaacfb3e49b669", "lessThan": "b54c9beb90e570bae17a9c18442aeeaf17165ccb", "status": "affected", "versionType": "git"}, {"version": "1e9ea7e04472d4e5e12e58c881eaacfb3e49b669", "lessThan": "097cdfd0a55df5af82c9753833f39a8bfadbcfcb", "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/attrib.c"], "versions": [{"version": "2.6.12", "status": "affected"}, {"version": "7.1", "status": "affected"}, {"version": "0", "lessThan": "2.6.12", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.9", "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": "2.6.12", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.9"}, {"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/b06b4fc2138ded8ee0b3dc602991ff6dbb10dd0a"}, {"url": "https://git.kernel.org/stable/c/6626fb859f4c4772f2f59751d23937716e03f98f"}, {"url": "https://git.kernel.org/stable/c/7ffa8f3d30236e0ab897c30bdb01224ff1fe1c89"}, {"url": "https://git.kernel.org/stable/c/b54c9beb90e570bae17a9c18442aeeaf17165ccb"}, {"url": "https://git.kernel.org/stable/c/097cdfd0a55df5af82c9753833f39a8bfadbcfcb"}], "title": "ntfs: reject non-resident records for resident-only attributes", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/ntfs/attrib.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "b06b4fc2138ded8ee0b3dc602991ff6dbb10dd0a", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "6626fb859f4c4772f2f59751d23937716e03f98f", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "7ffa8f3d30236e0ab897c30bdb01224ff1fe1c89", "status": "affected", "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "versionType": "git"}, {"lessThan": "b54c9beb90e570bae17a9c18442aeeaf17165ccb", "status": "affected", "version": "1e9ea7e04472d4e5e12e58c881eaacfb3e49b669", "versionType": "git"}, {"lessThan": "097cdfd0a55df5af82c9753833f39a8bfadbcfcb", "status": "affected", "version": "1e9ea7e04472d4e5e12e58c881eaacfb3e49b669", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/ntfs/attrib.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.12"}, {"status": "affected", "version": "7.1"}, {"lessThan": "2.6.12", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThan": "7.1", "status": "unaffected", "version": "6.9", "versionType": "semver"}, {"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: reject non-resident records for resident-only attributes\n\nThe shared lookup-time attribute validator rejects non-resident\n$FILE_NAME and $VOLUME_NAME records because their formats require\nresident values and callers handle returned records as resident\nattributes. Other resident-only attribute types still pass through the\ngeneric non-resident mapping-pairs checks.\n\nThat leaves real resident/non-resident union confusion paths. Inode load\nlooks up $STANDARD_INFORMATION and then reads data.resident.value_offset\nwithout checking a->non_resident. ntfs_inode_sync_standard_information()\ndoes the same when updating the standard information value.\nntfs_write_volume_flags() also looks up $VOLUME_INFORMATION and reads\ndata.resident.value_offset directly. $INDEX_ROOT callers in dir.c and\nindex.c depend on the same lookup contract before consuming the resident\nindex root value.\n\nReject non-resident records for all resident-only attribute types in the\nshared validator. Keep the existing $FILE_NAME and $VOLUME_NAME behavior,\nbut factor it through a helper and extend it to\n$STANDARD_INFORMATION, $OBJECT_ID, $VOLUME_INFORMATION, $INDEX_ROOT, and\n$EA_INFORMATION. For $OBJECT_ID and $EA_INFORMATION this is contract\nhardening for resident-only formats; this patch only rejects the\nnon-resident form and does not add new resident value validation for\nthose types."}], "id": "CVE-2026-72198", "lastModified": "2026-10-30T13:19:48.050", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-08-15T06:21:38.440", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/097cdfd0a55df5af82c9753833f39a8bfadbcfcb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6626fb859f4c4772f2f59751d23937716e03f98f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7ffa8f3d30236e0ab897c30bdb01224ff1fe1c89"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b06b4fc2138ded8ee0b3dc602991ff6dbb10dd0a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b54c9beb90e570bae17a9c18442aeeaf17165ccb"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: ntfs: reject non-resident records for resident-only attributes", "id": "2516281", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516281"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-843", "details": ["A flaw was found in the Linux kernel's NTFS file system driver. This vulnerability arises from the incorrect handling of non-resident records for attributes that are expected to be resident. This can lead to 'union confusion paths' where the kernel attempts to read data from an incorrect memory location or misinterprets attribute values. While the direct impact is not explicitly detailed, such issues can typically lead to system instability or a denial of service."], "name": "CVE-2026-72198", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-72198\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-72198\nhttps://lore.kernel.org/linux-cve-announce/2026081543-CVE-2026-72198-f9d1@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,b54c9beb90e570bae17a9c18442aeeaf17165ccb)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,097cdfd0a55df5af82c9753833f39a8bfadbcfcb)"}}, {"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": "[7.1.5,7.1.*]"}}, {"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": "2026-08-15T10:00:06.528414+00:00", "updated": "2026-08-18T14:15:07.936270+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-20", "CWE-843"]}