FKIE_CVE-2021-0920

Vulnerability from fkie_nvd - Published: 2021-12-15 19:15 - Updated: 2026-06-17 03:30
Severity
6.4 (Medium) - CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
6.4 (Medium) - CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Summary
In unix_scm_to_skb of af_unix.c, there is a possible use after free bug due to a race condition. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-196926917References: Upstream kernel
References
security@android.comhttps://lists.debian.org/debian-lts-announce/2021/12/msg00012.htmlMailing List, Third Party Advisory
security@android.comhttps://source.android.com/security/bulletin/2021-11-01Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2021/12/msg00012.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://source.android.com/security/bulletin/2021-11-01Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-0920Third Party Advisory, US Government Resource
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel 5.14
linux linux_kernel 5.14
linux linux_kernel 5.14
google android -
debian debian_linux 9.0
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "Android",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "Android kernel"
            }
          ]
        }
      ],
      "source": "security@android.com"
    }
  ],
  "cisaActionDue": "2022-06-13",
  "cisaExploitAdd": "2022-05-23",
  "cisaRequiredAction": "Apply updates per vendor instructions.",
  "cisaVulnerabilityName": "Android Kernel Race Condition Vulnerability",
  "configurations": [
    {
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        {
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              "versionEndIncluding": "5.13",
              "vulnerable": true
            },
            {
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              "matchCriteriaId": "71268287-21A8-4488-AA4F-23C473153131",
              "vulnerable": true
            },
            {
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              "matchCriteriaId": "23B9E5C6-FAB5-4A02-9E39-27C8787B0991",
              "vulnerable": true
            },
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              "matchCriteriaId": "D185CF67-7E4A-4154-93DB-CE379C67DB56",
              "vulnerable": true
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          ],
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In unix_scm_to_skb of af_unix.c, there is a possible use after free bug due to a race condition. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-196926917References: Upstream kernel"
    },
    {
      "lang": "es",
      "value": "En la funci\u00f3n unix_scm_to_skb del archivo af_unix.c, se presenta un posible error de uso de memoria previamente liberada debido a una condici\u00f3n de carrera. Esto podr\u00eda conllevar a una escalada local de privilegios con los privilegios de ejecuci\u00f3n System requeridos. No es requerida una interacci\u00f3n del usuario para su explotaci\u00f3n. Producto: Android. Versiones: Android kernel. ID de Android: A-196926917 Referencias: Kernel ascendente"
    }
  ],
  "id": "CVE-2021-0920",
  "lastModified": "2026-06-17T03:30:39.430",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "LOCAL",
          "authentication": "NONE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 6.9,
          "confidentialityImpact": "COMPLETE",
          "integrityImpact": "COMPLETE",
          "vectorString": "AV:L/AC:M/Au:N/C:C/I:C/A:C",
          "version": "2.0"
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        "impactScore": 10.0,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
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          "role": "CISA Coordinator",
          "timestamp": "2024-02-06T16:18:51.272894Z",
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  "published": "2021-12-15T19:15:11.017",
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  "sourceIdentifier": "security@android.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
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      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}



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