FKIE_CVE-2021-47171

Vulnerability from fkie_nvd - Published: 2024-03-25 10:15 - Updated: 2026-06-17 04:16
Severity
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: net: usb: fix memory leak in smsc75xx_bind Syzbot reported memory leak in smsc75xx_bind(). The problem was is non-freed memory in case of errors after memory allocation. backtrace: [<ffffffff84245b62>] kmalloc include/linux/slab.h:556 [inline] [<ffffffff84245b62>] kzalloc include/linux/slab.h:686 [inline] [<ffffffff84245b62>] smsc75xx_bind+0x7a/0x334 drivers/net/usb/smsc75xx.c:1460 [<ffffffff82b5b2e6>] usbnet_probe+0x3b6/0xc30 drivers/net/usb/usbnet.c:1728
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/200dbfcad8011e50c3cec269ed7b980836eeb1faPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/22c840596af0c09068b6cf948616e6496e59e07fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/46a8b29c6306d8bbfd92b614ef65a47c900d8e70Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/635ac38b36255d3cfb8312cf7c471334f4d537e0Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/70c886ac93f87ae7214a0c69151a28a8075dd95bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9e6a3eccb28779710cbbafc4f4258d92509c6d07Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9e6b8c1ff9d997e1fa16cbd2d60739adf6dc1bbcPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b95fb96e6339e34694dd578fb6bde3575b01af17Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/200dbfcad8011e50c3cec269ed7b980836eeb1faPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/22c840596af0c09068b6cf948616e6496e59e07fPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/46a8b29c6306d8bbfd92b614ef65a47c900d8e70Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/635ac38b36255d3cfb8312cf7c471334f4d537e0Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/70c886ac93f87ae7214a0c69151a28a8075dd95bPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/9e6a3eccb28779710cbbafc4f4258d92509c6d07Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/9e6b8c1ff9d997e1fa16cbd2d60739adf6dc1bbcPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b95fb96e6339e34694dd578fb6bde3575b01af17Patch
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 *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/usb/smsc75xx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "200dbfcad8011e50c3cec269ed7b980836eeb1fa",
              "status": "affected",
              "version": "d0cad871703b898a442e4049c532ec39168e5b57",
              "versionType": "git"
            },
            {
              "lessThan": "22c840596af0c09068b6cf948616e6496e59e07f",
              "status": "affected",
              "version": "d0cad871703b898a442e4049c532ec39168e5b57",
              "versionType": "git"
            },
            {
              "lessThan": "9e6b8c1ff9d997e1fa16cbd2d60739adf6dc1bbc",
              "status": "affected",
              "version": "d0cad871703b898a442e4049c532ec39168e5b57",
              "versionType": "git"
            },
            {
              "lessThan": "9e6a3eccb28779710cbbafc4f4258d92509c6d07",
              "status": "affected",
              "version": "d0cad871703b898a442e4049c532ec39168e5b57",
              "versionType": "git"
            },
            {
              "lessThan": "b95fb96e6339e34694dd578fb6bde3575b01af17",
              "status": "affected",
              "version": "d0cad871703b898a442e4049c532ec39168e5b57",
              "versionType": "git"
            },
            {
              "lessThan": "635ac38b36255d3cfb8312cf7c471334f4d537e0",
              "status": "affected",
              "version": "d0cad871703b898a442e4049c532ec39168e5b57",
              "versionType": "git"
            },
            {
              "lessThan": "70c886ac93f87ae7214a0c69151a28a8075dd95b",
              "status": "affected",
              "version": "d0cad871703b898a442e4049c532ec39168e5b57",
              "versionType": "git"
            },
            {
              "lessThan": "46a8b29c6306d8bbfd92b614ef65a47c900d8e70",
              "status": "affected",
              "version": "d0cad871703b898a442e4049c532ec39168e5b57",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/usb/smsc75xx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.34"
            },
            {
              "lessThan": "2.6.34",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.4.*",
              "status": "unaffected",
              "version": "4.4.271",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.9.*",
              "status": "unaffected",
              "version": "4.9.271",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.235",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.193",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.124",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.42",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.12.*",
              "status": "unaffected",
              "version": "5.12.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.13",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "A33A1AB8-3E91-4E38-B988-A00527F09E06",
              "versionEndExcluding": "4.4.271",
              "versionStartIncluding": "2.6.34",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "1E7DAE3A-78E9-45DB-96D8-4541CD7DC26B",
              "versionEndExcluding": "4.9.271",
              "versionStartIncluding": "4.5",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "03A23445-0C1A-42AB-AC5C-768360DDF32C",
              "versionEndExcluding": "4.14.235",
              "versionStartIncluding": "4.10",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "C8DEF3EC-88D9-4B89-8CF9-64BD6C863C9D",
              "versionEndExcluding": "4.19.193",
              "versionStartIncluding": "4.15",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "06FE0F99-F7A9-462A-8355-30E2EDA9826B",
              "versionEndExcluding": "5.4.124",
              "versionStartIncluding": "4.20",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "C3E7E799-1C8A-45FB-9E07-4731996144C9",
              "versionEndExcluding": "5.10.42",
              "versionStartIncluding": "5.5",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "2C8A1D02-81A7-44E5-ACFD-CC6A6694F930",
              "versionEndExcluding": "5.12.9",
              "versionStartIncluding": "5.11",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: usb: fix memory leak in smsc75xx_bind\n\nSyzbot reported memory leak in smsc75xx_bind().\nThe problem was is non-freed memory in case of\nerrors after memory allocation.\n\nbacktrace:\n  [\u003cffffffff84245b62\u003e] kmalloc include/linux/slab.h:556 [inline]\n  [\u003cffffffff84245b62\u003e] kzalloc include/linux/slab.h:686 [inline]\n  [\u003cffffffff84245b62\u003e] smsc75xx_bind+0x7a/0x334 drivers/net/usb/smsc75xx.c:1460\n  [\u003cffffffff82b5b2e6\u003e] usbnet_probe+0x3b6/0xc30 drivers/net/usb/usbnet.c:1728"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: net: usb: corrige la p\u00e9rdida de memoria en smsc75xx_bind Syzbot inform\u00f3 una p\u00e9rdida de memoria en smsc75xx_bind(). El problema era que la memoria no se liberaba en caso de errores despu\u00e9s de la asignaci\u00f3n de memoria. backtrace: [] kmalloc include/linux/slab.h:556 [en l\u00ednea] [] kzalloc include/linux/slab.h:686 [en l\u00ednea] [] smsc75xx_bind+0x7a/0x334 controladores/ net/usb/smsc75xx.c:1460 [] usbnet_probe+0x3b6/0xc30 controladores/net/usb/usbnet.c:1728"
    }
  ],
  "id": "CVE-2021-47171",
  "lastModified": "2026-06-17T04:16:49.533",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "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-2021-47171",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-09-10T15:54:28.610486Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-03-25T10:15:08.917",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      "url": "https://git.kernel.org/stable/c/200dbfcad8011e50c3cec269ed7b980836eeb1fa"
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    },
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    },
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      "url": "https://git.kernel.org/stable/c/b95fb96e6339e34694dd578fb6bde3575b01af17"
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  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-401"
        }
      ],
      "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

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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.