FKIE_CVE-2021-20321

Vulnerability from fkie_nvd - Published: 2022-02-18 18:15 - Updated: 2026-06-17 03:33
Severity
4.7 (Medium) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
A race condition accessing file object in the Linux kernel OverlayFS subsystem was found in the way users do rename in specific way with OverlayFS. A local user could use this flaw to crash the system.
References
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=2013242Issue Tracking, Third Party Advisory
secalert@redhat.comhttps://lists.debian.org/debian-lts-announce/2022/03/msg00012.htmlMailing List, Third Party Advisory
secalert@redhat.comhttps://lore.kernel.org/all/20211011134508.748956131%40linuxfoundation.org/
secalert@redhat.comhttps://www.debian.org/security/2022/dsa-5096Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=2013242Issue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2022/03/msg00012.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lore.kernel.org/all/20211011134508.748956131%40linuxfoundation.org/
af854a3a-2127-422b-91ae-364da2661108https://www.debian.org/security/2022/dsa-5096Third Party Advisory
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel 5.15
linux linux_kernel 5.15
linux linux_kernel 5.15
linux linux_kernel 5.15
linux linux_kernel 5.15
redhat enterprise_linux 7.0
redhat enterprise_linux 8.0
debian debian_linux 9.0
debian debian_linux 10.0
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "kernel",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "kernel 5.15-rc5"
            }
          ]
        }
      ],
      "source": "secalert@redhat.com"
    }
  ],
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A race condition accessing file object in the Linux kernel OverlayFS subsystem was found in the way users do rename in specific way with OverlayFS. A local user could use this flaw to crash the system."
    },
    {
      "lang": "es",
      "value": "Se encontr\u00f3 una condici\u00f3n de carrera al acceder a un objeto de archivo en el subsistema OverlayFS del kernel de Linux en la forma en que usuarios hacen el cambio de nombre de manera espec\u00edfica con OverlayFS. Un usuario local podr\u00eda usar este fallo para bloquear el sistema"
    }
  ],
  "id": "CVE-2021-20321",
  "lastModified": "2026-06-17T03:33:40.157",
  "metrics": {
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        "baseSeverity": "MEDIUM",
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          "accessVector": "LOCAL",
          "authentication": "NONE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 4.7,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:L/AC:M/Au:N/C:N/I:N/A:C",
          "version": "2.0"
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        "exploitabilityScore": 3.4,
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        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
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          "baseScore": 4.7,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
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          "scope": "UNCHANGED",
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          "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
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        "impactScore": 3.6,
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  "published": "2022-02-18T18:15:08.947",
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  "vulnStatus": "Modified",
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      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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