Vulnerability-Lookup

GHSA-F43G-CFGJ-442P

Vulnerability from github – Published: 2026-03-18 12:31 – Updated: 2026-03-18 12:31

Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2025-71266"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-03-18T11:16:15Z",
    "severity": null
  },
  "details": "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.",
  "id": "GHSA-f43g-cfgj-442p",
  "modified": "2026-03-18T12:31:52Z",
  "published": "2026-03-18T12:31:52Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-71266"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0ad7a1be44479503dbe5c699759861ef5b8bd70c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/14c3188afbedfd5178bbabb8002487ea14b37b56"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1732053c8a6b360e2d5afb1b34fe9779398b072c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/398e768d1accd1f5645492ab996005d7aa84a5b0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/435d34719db0e130f6f0c621d67ed524cc1a7d10"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/68e32694be231c1cdb99b7637a657314e88e1a96"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b0ea441f44ce64fa514a415d4a9e6e2b06e7946c"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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

Vulnerability from cvelistv5 – Published: 2026-03-18 10:05 – Updated: 2026-03-18 16:21

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

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/14c3188afbedfd517…
	https://git.kernel.org/stable/c/435d34719db0e130f…
	https://git.kernel.org/stable/c/68e32694be231c1cd…
	https://git.kernel.org/stable/c/398e768d1accd1f56…
	https://git.kernel.org/stable/c/b0ea441f44ce64fa5…
	https://git.kernel.org/stable/c/0ad7a1be44479503d…
	https://git.kernel.org/stable/c/1732053c8a6b360e2…

Impacted products

Vendor

Product

Version

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)

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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{
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        {
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              "status": "unaffected",
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            {
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              "status": "unaffected",
              "version": "6.6.128",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.75",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0-rc1",
              "versionType": "original_commit_for_fix"
            }
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        }
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        }
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    "datePublished": "2026-03-18T10:05:02.997Z",
    "dateReserved": "2026-03-17T09:08:18.457Z",
    "dateUpdated": "2026-03-18T16:21:45.388Z",
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}

Sightings

Author	Source	Type	Date

Nomenclature

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.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-F43G-CFGJ-442P

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

Tags

Sightings

Nomenclature