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ntfs3: bound to_move in indx_insert_into_root before hdr_insert_head

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: ntfs3: bound to_move in indx_insert_into_root before hdr_insert_head indx_insert_into_root() promotes a full resident $INDEX_ROOT into $INDEX_ALLOCATION and copies all non-last resident root entries into a newly allocated INDEX_BUFFER via hdr_insert_head(). The source byte count 'to_move' is summed from the on-disk resident entry sizes and is independent of the destination buffer size, which comes from root->index_block_size (via indx->index_bits). A crafted NTFS image that keeps a valid, full resident root but shrinks root->index_block_size down to 512 after the root has been populated makes hdr_insert_head() memcpy attacker-controlled resident entry bytes past the end of the kmalloc(1u << indx->index_bits) allocation returned by indx_new(). For a 512-byte destination and a resident root whose non-last entries total 560 bytes, the memcpy overruns by 120 bytes and a following memmove extends the highest written offset to 136 bytes past the allocation. The overflow bytes are a direct copy of on-disk entries (via kmemdup), so they are fully attacker-controlled. The write is reachable from unprivileged open(O_CREAT) on a mounted crafted NTFS image: a single sufficiently long create in a directory whose resident root is already full forces root promotion and triggers the copy. This is a controlled out-of-bounds write of 120-136 bytes past a kmalloc(index_block_size) allocation, with attacker-controlled content. I

Announced Source revision 1
Original source ↗

CVE-2026-72192

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-72192

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "82cae269cfa953032fbb8980a7d554d60fb00b17",
        "lessThan": "0af83b8155cc848e9f5d2c36e20a70d024214649",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "82cae269cfa953032fbb8980a7d554d60fb00b17",
        "lessThan": "cb3161deebcaf8d36d3115abf452c633f2180fc1",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "82cae269cfa953032fbb8980a7d554d60fb00b17",
        "lessThan": "53c5f3b2da3774b41534728aba295c098c9efa19",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "82cae269cfa953032fbb8980a7d554d60fb00b17",
        "lessThan": "194b00c99ba971fa7cf6acd747a36032c6de54eb",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "82cae269cfa953032fbb8980a7d554d60fb00b17",
        "lessThan": "aaa1f956c0fc41089a4a534da7df91552a08a47c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "82cae269cfa953032fbb8980a7d554d60fb00b17",
        "lessThan": "d240f5f9d036b8180224954d9873f172b6be4dd8",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "82cae269cfa953032fbb8980a7d554d60fb00b17",
        "lessThan": "9b6926ac9c970ae0b2c2fe6289b16e9aa10b6a67",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "fs/ntfs3/index.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.15"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.15",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.15.212",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.178",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.145",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.97",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.40",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.5",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "fs/ntfs3/index.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-72192

Source reference: /cveMetadata/cveId

Publisher severity

critical

Source reference: /containers/cna/metrics

Event
#32969 · Revision 1
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Publisher date
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