CVE-2025-71266 (GCVE-0-2025-71266)

Vulnerability from cvelistv5 – Published: 2026-03-18 10:05 – Updated: 2026-03-18 16:21
VLAI?
Title
fs: ntfs3: check return value of indx_find to avoid infinite loop
Summary
In the Linux kernel, the following vulnerability has been resolved: fs: ntfs3: check return value of indx_find to avoid infinite loop We found an infinite loop bug in the ntfs3 file system that can lead to a Denial-of-Service (DoS) condition. A malformed dentry in the ntfs3 filesystem can cause the kernel to hang during the lookup operations. By setting the HAS_SUB_NODE flag in an INDEX_ENTRY within a directory's INDEX_ALLOCATION block and manipulating the VCN pointer, an attacker can cause the indx_find() function to repeatedly read the same block, allocating 4 KB of memory each time. The kernel lacks VCN loop detection and depth limits, causing memory exhaustion and an OOM crash. This patch adds a return value check for fnd_push() to prevent a memory exhaustion vulnerability caused by infinite loops. When the index exceeds the size of the fnd->nodes array, fnd_push() returns -EINVAL. The indx_find() function checks this return value and stops processing, preventing further memory allocation.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 82cae269cfa953032fbb8980a7d554d60fb00b17 , < 14c3188afbedfd5178bbabb8002487ea14b37b56 (git)
Affected: 82cae269cfa953032fbb8980a7d554d60fb00b17 , < 435d34719db0e130f6f0c621d67ed524cc1a7d10 (git)
Affected: 82cae269cfa953032fbb8980a7d554d60fb00b17 , < 68e32694be231c1cdb99b7637a657314e88e1a96 (git)
Affected: 82cae269cfa953032fbb8980a7d554d60fb00b17 , < 398e768d1accd1f5645492ab996005d7aa84a5b0 (git)
Affected: 82cae269cfa953032fbb8980a7d554d60fb00b17 , < b0ea441f44ce64fa514a415d4a9e6e2b06e7946c (git)
Affected: 82cae269cfa953032fbb8980a7d554d60fb00b17 , < 0ad7a1be44479503dbe5c699759861ef5b8bd70c (git)
Affected: 82cae269cfa953032fbb8980a7d554d60fb00b17 , < 1732053c8a6b360e2d5afb1b34fe9779398b072c (git)
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    Linux Linux Affected: 5.15
Unaffected: 0 , < 5.15 (semver)
Unaffected: 5.15.202 , ≤ 5.15.* (semver)
Unaffected: 6.1.165 , ≤ 6.1.* (semver)
Unaffected: 6.6.128 , ≤ 6.6.* (semver)
Unaffected: 6.12.75 , ≤ 6.12.* (semver)
Unaffected: 6.18.16 , ≤ 6.18.* (semver)
Unaffected: 6.19.6 , ≤ 6.19.* (semver)
Unaffected: 7.0-rc1 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs: ntfs3: check return value of indx_find to avoid infinite loop\n\nWe found an infinite loop bug in the ntfs3 file system that can lead to a\nDenial-of-Service (DoS) condition.\n\nA malformed dentry in the ntfs3 filesystem can cause the kernel to hang\nduring the lookup operations. By setting the HAS_SUB_NODE flag in an\nINDEX_ENTRY within a directory\u0027s INDEX_ALLOCATION block and manipulating the\nVCN pointer, an attacker can cause the indx_find() function to repeatedly\nread the same block, allocating 4 KB of memory each time. The kernel lacks\nVCN loop detection and depth limits, causing memory exhaustion and an OOM\ncrash.\n\nThis patch adds a return value check for fnd_push() to prevent a memory\nexhaustion vulnerability caused by infinite loops. When the index exceeds the\nsize of the fnd-\u003enodes array, fnd_push() returns -EINVAL. The indx_find()\nfunction checks this return value and stops processing, preventing further\nmemory allocation."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-03-18T16:21:45.388Z",
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    "dateReserved": "2026-03-17T09:08:18.457Z",
    "dateUpdated": "2026-03-18T16:21:45.388Z",
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  }
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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