Vulnerability-Lookup

FKIE_CVE-2021-47168

Vulnerability from fkie_nvd - Published: 2024-03-25 10:15 - Updated: 2026-08-04 10:16

Severity

9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: NFS: fix an incorrect limit in filelayout_decode_layout() The "sizeof(struct nfs_fh)" is two bytes too large and could lead to memory corruption. It should be NFS_MAXFHSIZE because that's the size of the ->data[] buffer. I reversed the size of the arguments to put the variable on the left.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/769b01ea68b6c49dc3cde6adf7e53927dacbd3a8	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/945ebef997227ca8c20bad7f8a8358c8ee57a84a	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9b367fe770b1b80d7bf64ed0d177544a44405f6e	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9d280ab53df1d4a1043bd7a9e7c6a2f9cfbfe040	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b287521e9e94bb342ebe5fd8c3fd7db9aef4e6f1	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d34fb628f6ef522f996205a9e578216bbee09e84	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e411df81cd862ef3d5b878120b2a2fef0ca9cdb1	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f299522eda1566cbfbae4b15c82970fc41b03714	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/769b01ea68b6c49dc3cde6adf7e53927dacbd3a8	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/945ebef997227ca8c20bad7f8a8358c8ee57a84a	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/9b367fe770b1b80d7bf64ed0d177544a44405f6e	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/9d280ab53df1d4a1043bd7a9e7c6a2f9cfbfe040	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/b287521e9e94bb342ebe5fd8c3fd7db9aef4e6f1	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/d34fb628f6ef522f996205a9e578216bbee09e84	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/e411df81cd862ef3d5b878120b2a2fef0ca9cdb1	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/f299522eda1566cbfbae4b15c82970fc41b03714	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	5.13
linux	linux_kernel	5.13
linux	linux_kernel	5.13

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/nfs/filelayout/filelayout.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "9d280ab53df1d4a1043bd7a9e7c6a2f9cfbfe040",
              "status": "affected",
              "version": "16b374ca439fb406e46e071f75428f5b033056f8",
              "versionType": "git"
            },
            {
              "lessThan": "b287521e9e94bb342ebe5fd8c3fd7db9aef4e6f1",
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              "versionType": "git"
            },
            {
              "lessThan": "f299522eda1566cbfbae4b15c82970fc41b03714",
              "status": "affected",
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              "versionType": "git"
            },
            {
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              "status": "affected",
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              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "16b374ca439fb406e46e071f75428f5b033056f8",
              "versionType": "git"
            },
            {
              "lessThan": "9b367fe770b1b80d7bf64ed0d177544a44405f6e",
              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "d34fb628f6ef522f996205a9e578216bbee09e84",
              "status": "affected",
              "version": "16b374ca439fb406e46e071f75428f5b033056f8",
              "versionType": "git"
            },
            {
              "lessThan": "769b01ea68b6c49dc3cde6adf7e53927dacbd3a8",
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/nfs/filelayout/filelayout.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.37"
            },
            {
              "lessThan": "2.6.37",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.4.*",
              "status": "unaffected",
              "version": "4.4.271",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.9.*",
              "status": "unaffected",
              "version": "4.9.271",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.235",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.193",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.124",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.42",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.12.*",
              "status": "unaffected",
              "version": "5.12.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.13",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "AA9C0516-0AB8-4BC5-8058-1896E469EB2D",
              "versionEndExcluding": "4.4.271",
              "versionStartIncluding": "2.6.37",
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              "versionEndExcluding": "5.10.42",
              "versionStartIncluding": "5.5",
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            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "2C8A1D02-81A7-44E5-ACFD-CC6A6694F930",
              "versionEndExcluding": "5.12.9",
              "versionStartIncluding": "5.11",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "0CBAD0FC-C281-4666-AB2F-F8E6E1165DF7",
              "vulnerable": true
            },
            {
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              "matchCriteriaId": "96AC23B2-D46A-49D9-8203-8E1BEDCA8532",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.13:rc3:*:*:*:*:*:*",
              "matchCriteriaId": "DA610E30-717C-4700-9F77-A3C9244F3BFD",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nNFS: fix an incorrect limit in filelayout_decode_layout()\n\nThe \"sizeof(struct nfs_fh)\" is two bytes too large and could lead to\nmemory corruption.  It should be NFS_MAXFHSIZE because that\u0027s the size\nof the -\u003edata[] buffer.\n\nI reversed the size of the arguments to put the variable on the left."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: NFS: corrige un l\u00edmite incorrecto en filelayout_decode_layout() El \"sizeof(struct nfs_fh)\" es dos bytes demasiado grande y podr\u00eda provocar da\u00f1os en la memoria. Deber\u00eda ser NFS_MAXFHSIZE porque ese es el tama\u00f1o del b\u00fafer -\u0026gt;datos[]. Invert\u00ed el tama\u00f1o de los argumentos para poner la variable a la izquierda."
    }
  ],
  "id": "CVE-2021-47168",
  "lastModified": "2026-08-04T10:16:50.143",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-47168",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-09-10T15:54:34.857777Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-03-25T10:15:08.773",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
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      "url": "https://git.kernel.org/stable/c/769b01ea68b6c49dc3cde6adf7e53927dacbd3a8"
    },
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    },
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  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
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      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
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      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
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  ]
}

CVE-2021-47168 (GCVE-0-2021-47168)

Vulnerability from cvelistv5 – Published: 2024-03-25 09:16 – Updated: 2026-08-05 08:46

Title

NFS: fix an incorrect limit in filelayout_decode_layout()

Summary

Severity

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-09-10 15:54 UTC

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 7056 records in the last 180 days details

References

8 references

URL	Tags
https://git.kernel.org/stable/c/9d280ab53df1d4a10…
https://git.kernel.org/stable/c/b287521e9e94bb342…
https://git.kernel.org/stable/c/f299522eda1566cbf…
https://git.kernel.org/stable/c/945ebef997227ca8c…
https://git.kernel.org/stable/c/e411df81cd862ef3d…
https://git.kernel.org/stable/c/9b367fe770b1b80d7…
https://git.kernel.org/stable/c/d34fb628f6ef522f9…
https://git.kernel.org/stable/c/769b01ea68b6c49dc…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 16b374ca439fb406e46e071f75428f5b033056f8 , < 9d280ab53df1d4a1043bd7a9e7c6a2f9cfbfe040 (git) Affected: 16b374ca439fb406e46e071f75428f5b033056f8 , < b287521e9e94bb342ebe5fd8c3fd7db9aef4e6f1 (git) Affected: 16b374ca439fb406e46e071f75428f5b033056f8 , < f299522eda1566cbfbae4b15c82970fc41b03714 (git) Affected: 16b374ca439fb406e46e071f75428f5b033056f8 , < 945ebef997227ca8c20bad7f8a8358c8ee57a84a (git) Affected: 16b374ca439fb406e46e071f75428f5b033056f8 , < e411df81cd862ef3d5b878120b2a2fef0ca9cdb1 (git) Affected: 16b374ca439fb406e46e071f75428f5b033056f8 , < 9b367fe770b1b80d7bf64ed0d177544a44405f6e (git) Affected: 16b374ca439fb406e46e071f75428f5b033056f8 , < d34fb628f6ef522f996205a9e578216bbee09e84 (git) Affected: 16b374ca439fb406e46e071f75428f5b033056f8 , < 769b01ea68b6c49dc3cde6adf7e53927dacbd3a8 (git)
Linux	Linux	Affected: 2.6.37 Unaffected: 0 , < 2.6.37 (semver) Unaffected: 4.4.271 , ≤ 4.4.* (semver) Unaffected: 4.9.271 , ≤ 4.9.* (semver) Unaffected: 4.14.235 , ≤ 4.14.* (semver) Unaffected: 4.19.193 , ≤ 4.19.* (semver) Unaffected: 5.4.124 , ≤ 5.4.* (semver) Unaffected: 5.10.42 , ≤ 5.10.* (semver) Unaffected: 5.12.9 , ≤ 5.12.* (semver) Unaffected: 5.13 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-04T05:24:39.927Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
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Sightings

Author	Source	Type	Date	Other

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.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

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