FKIE_CVE-2021-4148

Vulnerability from fkie_nvd - Published: 2022-03-23 20:15 - Updated: 2026-06-17 04:19
Severity
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
A vulnerability was found in the Linux kernel's block_invalidatepage in fs/buffer.c in the filesystem. A missing sanity check may allow a local attacker with user privilege to cause a denial of service (DOS) problem.
References
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2026487Issue Tracking, Third Party Advisory
secalert@redhat.comhttps://lkml.org/lkml/2021/9/12/323Exploit, Mailing List, Patch, Third Party Advisory
secalert@redhat.comhttps://lkml.org/lkml/2021/9/17/1037Exploit, Mailing List, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=2026487Issue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lkml.org/lkml/2021/9/12/323Exploit, Mailing List, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lkml.org/lkml/2021/9/17/1037Exploit, Mailing List, Patch, Third Party Advisory
Impacted products
Vendor Product Version
linux linux_kernel *
fedoraproject fedora 35
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "kernel",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "kernel 5.14.16"
            }
          ]
        }
      ],
      "source": "secalert@redhat.com"
    }
  ],
  "configurations": [
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      "nodes": [
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          "cpeMatch": [
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              "versionEndExcluding": "5.14.16",
              "vulnerable": true
            }
          ],
          "negate": false,
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A vulnerability was found in the Linux kernel\u0027s block_invalidatepage in fs/buffer.c in the filesystem. A missing sanity check may allow a local attacker with user privilege to cause a denial of service (DOS) problem."
    },
    {
      "lang": "es",
      "value": "Se encontr\u00f3 una vulnerabilidad en la funci\u00f3n block_invalidatepage del kernel de Linux en el archivo fs/buffer.c en el sistema de archivos. Una falta de comprobaci\u00f3n de saneo puede permitir a un atacante local con privilegios de usuario causar un problema de denegaci\u00f3n de servicio (DOS)"
    }
  ],
  "id": "CVE-2021-4148",
  "lastModified": "2026-06-17T04:19:07.113",
  "metrics": {
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      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "LOCAL",
          "authentication": "NONE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 4.9,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:C",
          "version": "2.0"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 6.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV31": [
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          "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"
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  "published": "2022-03-23T20:15:09.947",
  "references": [
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  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Modified",
  "weaknesses": [
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      "description": [
        {
          "lang": "en",
          "value": "CWE-354"
        }
      ],
      "source": "secalert@redhat.com",
      "type": "Secondary"
    },
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-354"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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Nomenclature

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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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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.