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fs: ntfs3: fix infinite loop triggered by zero-sized ATTR_LIST

Type: advisorySources: OSV

In the Linux kernel, the following vulnerability has been resolved: fs: ntfs3: fix infinite loop triggered by zero-sized ATTR_LIST We found an infinite loop bug in the ntfs3 file system that can lead to a Denial-of-Service (DoS) condition. A malformed NTFS image can cause an infinite loop when an ATTR_LIST attribute indicates a zero data size while the driver allocates memory for it. When ntfs_load_attr_list() processes a resident ATTR_LIST with data_size set to zero, it still allocates memory because of al_aligned(0). This creates an inconsistent state where ni->attr_list.size is zero, but ni->attr_list.le is non-null. This causes ni_enum_attr_ex to incorrectly assume that no attribute list exists and enumerates only the primary MFT record. When it finds ATTR_LIST, the code reloads it and restarts the enumeration, repeating indefinitely. The mount operation never completes, hanging the kernel thread. This patch adds validation to ensure that data_size is non-zero before memory allocation. When a zero-sized ATTR_LIST is detected, the function returns -EINVAL, preventing a DoS vulnerability.

Products
Kernel
Affected versions
Not specified
Fixed versions
5.15.202, 6.1.165, 6.12.75, 6.18.16, 6.19.6, 6.6.128
CVEs
CVE-2025-71267
Confirmed fixed CVEs
Not specified
Updated in this feed
3 Nov 2026, 06:54 UTC · Revision 1

Source evidence

fs: ntfs3: fix infinite loop triggered by zero-sized ATTR_LIST

core-osv · Original source

Published 18 Mar 2026, 10:05 UTC

In the Linux kernel, the following vulnerability has been resolved: fs: ntfs3: fix infinite loop triggered by zero-sized ATTR_LIST We found an infinite loop bug in the ntfs3 file system that can lead to a Denial-of-Service (DoS) condition. A malformed NTFS image can cause an infinite loop when an ATTR_LIST attribute indicates a zero data size while the driver allocates memory for it. When ntfs_load_attr_list() processes a resident ATTR_LIST with data_size set to zero, it still allocates memory because of al_aligned(0). This creates an inconsistent state where ni->attr_list.size is zero, but ni->attr_list.le is non-null. This causes ni_enum_attr_ex to incorrectly assume that no attribute list exists and enumerates only the primary MFT record. When it finds ATTR_LIST, the code reloads it and restarts the enumeration, repeating indefinitely. The mount operation never completes, hanging the kernel thread. This patch adds validation to ensure that data_size is non-zero before memory allocation. When a zero-sized ATTR_LIST is detected, the function returns -EINVAL, preventing a DoS vulnerability.

osv:CVE-2025-71267

Kernel

Fixed versions: 5.15.202, 6.1.165, 6.6.128, 6.12.75, 6.18.16, 6.19.6

Complete source record
{
  "id": "14b58d60d364021d2416c30b6963f186c3e8835c9909157590b59c0c9828d6f7",
  "url": "https://osv.dev/vulnerability/CVE-2025-71267",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "fs: ntfs3: fix infinite loop triggered by zero-sized ATTR_LIST",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: fs: ntfs3: fix infinite loop triggered by zero-sized ATTR_LIST We found an infinite loop bug in the ntfs3 file system that can lead to a Denial-of-Service (DoS) condition. A malformed NTFS image can cause an infinite loop when an ATTR_LIST attribute indicates a zero data size while the driver allocates memory for it. When ntfs_load_attr_list() processes a resident ATTR_LIST with data_size set to zero, it still allocates memory because of al_aligned(0). This creates an inconsistent state where ni->attr_list.size is zero, but ni->attr_list.le is non-null. This causes ni_enum_attr_ex to incorrectly assume that no attribute list exists and enumerates only the primary MFT record. When it finds ATTR_LIST, the code reloads it and restarts the enumeration, repeating indefinitely. The mount operation never completes, hanging the kernel thread. This patch adds validation to ensure that data_size is non-zero before memory allocation. When a zero-sized ATTR_LIST is detected, the function returns -EINVAL, preventing a DoS vulnerability.",
    "evidence": "osv:CVE-2025-71267",
    "products": [
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          "evidence": "/affected/1/package/name"
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            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
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      "aliases": [
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      "affected": [
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            },
            {
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          ],
          "package": {
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        }
      ],
      "modified": "2026-10-28T02:30:26.755287109Z",
      "provider": "osv",
      "references": [
        "https://cert-portal.siemens.com/productcert/html/ssa-019113.html",
        "https://cert-portal.siemens.com/productcert/html/ssa-082556.html",
        "https://cert-portal.siemens.com/productcert/html/ssa-457936.html",
        "https://git.kernel.org/stable/c/06909b2549d631a47fcda249d34be26f7ca1711d",
        "https://git.kernel.org/stable/c/7ef219656febf5ae06ae56b1fce47ebd05f92b68",
        "https://git.kernel.org/stable/c/8d8c70b57dbeda3eb165c0940b97e85373ca9354",
        "https://git.kernel.org/stable/c/9267d99fade76d44d4a133599524031fe684156e",
        "https://git.kernel.org/stable/c/976e6a7c51fabf150478decbe8ef5d9a26039b7c",
        "https://git.kernel.org/stable/c/9779a6eaaabdf47aa57910d352b398ad742e6a5f",
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        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/71xxx/CVE-2025-71267.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-71267",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/71xxx/CVE-2025-71267.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-71267",
        "evidence": "/id"
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    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 493173,
  "published_at": "2026-03-18T10:05:04.008+00:00"
}