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fs/ntfs3: add depth limit to indx_find_buffer to prevent stack overflow

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: add depth limit to indx_find_buffer to prevent stack overflow indx_find_buffer() recursively descends the B+ tree index with no depth limit. A crafted NTFS image with circular index node references causes unbounded recursion, overflowing the kernel stack and panicking the system. This is reachable by mounting a malicious NTFS filesystem (e.g. from a USB drive via desktop automount) and deleting a file whose index entry triggers the rebalancing fallback path in indx_delete_entry(). Add a depth parameter and bail out with -EINVAL when it reaches the fnd->nodes array bound, matching the constraint already enforced by fnd_push() in indx_find(). The related function indx_find() was previously patched for a similar infinite-loop issue (commit 1732053c8a6b), but indx_find_buffer() was missed.

Announced Source revision 1
Original source ↗

CVE-2026-72194

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-2026-72194

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": "99031d4f63c785d2a985b6a4c64c4256f7117052",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "82cae269cfa953032fbb8980a7d554d60fb00b17",
        "lessThan": "65357a81f64cb3fbe13b4b937586755e4b3a072f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "82cae269cfa953032fbb8980a7d554d60fb00b17",
        "lessThan": "96fb64f9da86fd2dbd78fbe9d9e41ae27e12ce34",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "82cae269cfa953032fbb8980a7d554d60fb00b17",
        "lessThan": "78612f478f9fadcec4f9b3b089970da67ffb47e9",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "82cae269cfa953032fbb8980a7d554d60fb00b17",
        "lessThan": "908c9243ba309997b73cbda3e4c563d0fb345ee9",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "82cae269cfa953032fbb8980a7d554d60fb00b17",
        "lessThan": "fdf50c788e0991e42a187ff75479a0df7fb752f1",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "82cae269cfa953032fbb8980a7d554d60fb00b17",
        "lessThan": "1ebd684b8f627f75bc3e03f8b2ad8400fd1f02cd",
        "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-2026-72194

Source reference: /cveMetadata/cveId

Publisher severity

critical

Source reference: /containers/cna/metrics

Event
#32970 · Revision 1
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Publisher date
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