{
  "id": "CVE-2021-44879",
  "sourceIdentifier": "cve@mitre.org",
  "published": "2022-02-14T12:15:15.697",
  "lastModified": "2022-02-22T18:26:53.867",
  "vulnStatus": "Analyzed",
  "descriptions": [
    {
      "lang": "en",
      "value": "In gc_data_segment in fs/f2fs/gc.c in the Linux kernel before 5.16.3, special files are not considered, leading to a move_data_page NULL pointer dereference."
    },
    {
      "lang": "es",
      "value": "En la funci\u00f3n gc_data_segment en el archivo fs/f2fs/gc.c en el kernel de Linux versiones anteriores a 5.16.3, no son considerados los archivos especiales, conllevando a una desreferencia de puntero NULL de move_data_page"
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "nvd@nist.gov",
        "type": "Primary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "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:N/AC:M/Au:N/C:N/I:N/A:P",
          "accessVector": "NETWORK",
          "accessComplexity": "MEDIUM",
          "authentication": "NONE",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 4.3
        },
        "baseSeverity": "MEDIUM",
        "exploitabilityScore": 8.6,
        "impactScore": 2.9,
        "acInsufInfo": false,
        "obtainAllPrivilege": false,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": true
      }
    ]
  },
  "weaknesses": [
    {
      "source": "nvd@nist.gov",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "versionEndExcluding": "5.16.3",
              "matchCriteriaId": "6FBCF385-C05A-44CC-AF30-EDA38785D4BD"
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  ],
  "references": [
    {
      "url": "https://bugzilla.kernel.org/show_bug.cgi?id=215231",
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Issue Tracking",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16.3",
      "source": "cve@mitre.org",
      "tags": [
        "Mailing List",
        "Vendor Advisory"
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    },
    {
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9056d6489f5a41cfbb67f719d2c0ce61ead72d9f",
      "source": "cve@mitre.org",
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        "Patch",
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    },
    {
      "url": "https://lore.kernel.org/linux-f2fs-devel/20211206144421.3735-3-chao@kernel.org/T/",
      "source": "cve@mitre.org",
      "tags": [
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}