FKIE_CVE-2021-47620

Vulnerability from fkie_nvd - Published: 2024-06-20 11:15 - Updated: 2026-06-17 04:18
Severity
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: refactor malicious adv data check Check for out-of-bound read was being performed at the end of while num_reports loop, and would fill journal with false positives. Added check to beginning of loop processing so that it doesn't get checked after ptr has been advanced.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/305e92f525450f3e1b5f5c9dc7eadb152d66a082Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5a539c08d743d9910631448da78af5e961664c0ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5c968affa804ba98c3c603f37ffea6fba618025ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7889b38a7f21ed19314f83194622b195d328465cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/835d3706852537bf92eb23eb8635b8dee0c0aa67Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/83d5196b65d1b29e27d7dd16a3b9b439fb1d2dbaPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8819f93cd4a443dfe547aa622b21f723757df3fbPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/899663be5e75dc0174dc8bda0b5e6826edf0b29aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bcea886771c3f22a590c8c8b9139a107bd7f1e1cPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/305e92f525450f3e1b5f5c9dc7eadb152d66a082Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/5a539c08d743d9910631448da78af5e961664c0ePatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/5c968affa804ba98c3c603f37ffea6fba618025ePatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/7889b38a7f21ed19314f83194622b195d328465cPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/835d3706852537bf92eb23eb8635b8dee0c0aa67Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/83d5196b65d1b29e27d7dd16a3b9b439fb1d2dbaPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/8819f93cd4a443dfe547aa622b21f723757df3fbPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/899663be5e75dc0174dc8bda0b5e6826edf0b29aPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/bcea886771c3f22a590c8c8b9139a107bd7f1e1cPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/hci_event.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "versionType": "git"
            },
            {
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              "version": "4a1491432394b22e585a185ffca49086e4046aae",
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            },
            {
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              "versionType": "git"
            },
            {
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              "status": "affected",
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              "versionType": "git"
            },
            {
              "lessThan": "bcea886771c3f22a590c8c8b9139a107bd7f1e1c",
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            },
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              "status": "affected",
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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              "status": "affected",
              "version": "4.4.300",
              "versionType": "semver"
            },
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              "status": "affected",
              "version": "4.9.298",
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            },
            {
              "lessThan": "4.14.265",
              "status": "affected",
              "version": "4.14.263",
              "versionType": "semver"
            },
            {
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              "status": "affected",
              "version": "4.19.226",
              "versionType": "semver"
            },
            {
              "lessThan": "5.4.176",
              "status": "affected",
              "version": "5.4.174",
              "versionType": "semver"
            },
            {
              "lessThan": "5.10.96",
              "status": "affected",
              "version": "5.10.94",
              "versionType": "semver"
            },
            {
              "lessThan": "5.15.19",
              "status": "affected",
              "version": "5.15.17",
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            },
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              "status": "affected",
              "version": "5.16.3",
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            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
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              "matchCriteriaId": "09609993-CA3F-47E6-ABB6-BF512D8AFF65",
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            },
            {
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              "matchCriteriaId": "1AD9E77E-B27E-450C-8FD8-B64EC5FB002D",
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          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: refactor malicious adv data check\n\nCheck for out-of-bound read was being performed at the end of while\nnum_reports loop, and would fill journal with false positives. Added\ncheck to beginning of loop processing so that it doesn\u0027t get checked\nafter ptr has been advanced."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: Bluetooth: refactorizaci\u00f3n de verificaci\u00f3n de datos publicitarios maliciosos. Se estaba realizando una verificaci\u00f3n de lectura fuera de los l\u00edmites al final del bucle while num_reports y llenar\u00eda el diario con falsos positivos. Se agreg\u00f3 una verificaci\u00f3n al comienzo del procesamiento del bucle para que no se verifique despu\u00e9s de que se haya avanzado ptr."
    }
  ],
  "id": "CVE-2021-47620",
  "lastModified": "2026-06-17T04:18:10.770",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "NONE",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-47620",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-06-20T13:36:51.279922Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-06-20T11:15:54.653",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/305e92f525450f3e1b5f5c9dc7eadb152d66a082"
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    },
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    },
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  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.