{
  "id": "CVE-2021-4150",
  "sourceIdentifier": "secalert@redhat.com",
  "published": "2022-03-23T20:15:10.050",
  "lastModified": "2022-06-22T15:55:44.063",
  "vulnStatus": "Analyzed",
  "descriptions": [
    {
      "lang": "en",
      "value": "A use-after-free flaw was found in the add_partition in block/partitions/core.c in the Linux kernel. A local attacker with user privileges could cause a denial of service on the system. The issue results from the lack of code cleanup when device_add call fails when adding a partition to the disk."
    },
    {
      "lang": "es",
      "value": "Se ha encontrado un fallo de uso de memoria previamente liberada en la funci\u00f3n add_partition en el archivo block/partitions/core.c en el kernel de Linux. Un atacante local con privilegios de usuario podr\u00eda causar una denegaci\u00f3n de servicio en el sistema. El problema es debido a una falta de saneo del c\u00f3digo cuando la llamada device_add falla cuando es a\u00f1adida una partici\u00f3n al disco"
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6
      }
    ],
    "cvssMetricV2": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "2.0",
          "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:C",
          "accessVector": "LOCAL",
          "accessComplexity": "LOW",
          "authentication": "NONE",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 4.9
        },
        "baseSeverity": "MEDIUM",
        "exploitabilityScore": 3.9,
        "impactScore": 6.9,
        "acInsufInfo": false,
        "obtainAllPrivilege": false,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "weaknesses": [
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ]
    },
    {
      "source": "secalert@redhat.com",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "versionEndExcluding": "5.15",
              "matchCriteriaId": "037A6DFB-B41D-4CC7-86C1-A201809B79C4"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.15:*:*:*:*:*:*:*",
              "matchCriteriaId": "F3A5AEB8-1E0D-4F0F-9B26-CFCB02A8577A"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "E46C74C6-B76B-4C94-A6A4-FD2FFF62D644"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:*",
              "matchCriteriaId": "60134C3A-06E4-48C1-B04F-2903732A4E56"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:*",
              "matchCriteriaId": "0460DA88-8FE1-46A2-9DDA-1F1ABA552E71"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.15:rc4:*:*:*:*:*:*",
              "matchCriteriaId": "AF55383D-4DF2-45DC-93F7-571F4F978EAB"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.15:rc5:*:*:*:*:*:*",
              "matchCriteriaId": "9E9481B2-8AA6-4CBD-B5D3-C10F51FF6D01"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.15:rc6:*:*:*:*:*:*",
              "matchCriteriaId": "EBD45831-4B79-42BC-ABC0-86870F0DEA89"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2025938",
      "source": "secalert@redhat.com",
      "tags": [
        "Issue Tracking",
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://lkml.org/lkml/2021/10/18/485",
      "source": "secalert@redhat.com",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://lkml.org/lkml/2021/9/6/781",
      "source": "secalert@redhat.com",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ]
    }
  ]
}