FKIE_CVE-2021-47164

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/mlx5e: Fix null deref accessing lag dev It could be the lag dev is null so stop processing the event. In bond_enslave() the active/backup slave being set before setting the upper dev so first event is without an upper dev. After setting the upper dev with bond_master_upper_dev_link() there is a second event and in that event we have an upper dev.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2e4b0b95a489259f9d35a3db17023061f8f3d587Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/83026d83186bc48bb41ee4872f339b83f31dfc55Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bdfd3593a8248eea6ecfcbf7b47b56b86515672dPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/2e4b0b95a489259f9d35a3db17023061f8f3d587Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/83026d83186bc48bb41ee4872f339b83f31dfc55Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/bdfd3593a8248eea6ecfcbf7b47b56b86515672dPatch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/mellanox/mlx5/core/en/rep/bond.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2e4b0b95a489259f9d35a3db17023061f8f3d587",
              "status": "affected",
              "version": "7e51891a237f9ea319f53f9beb83afb0077d88e6",
              "versionType": "git"
            },
            {
              "lessThan": "bdfd3593a8248eea6ecfcbf7b47b56b86515672d",
              "status": "affected",
              "version": "7e51891a237f9ea319f53f9beb83afb0077d88e6",
              "versionType": "git"
            },
            {
              "lessThan": "83026d83186bc48bb41ee4872f339b83f31dfc55",
              "status": "affected",
              "version": "7e51891a237f9ea319f53f9beb83afb0077d88e6",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/mellanox/mlx5/core/en/rep/bond.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.8"
            },
            {
              "lessThan": "5.8",
              "status": "unaffected",
              "version": "0",
              "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": "AEC61F06-F018-4A5F-84C4-4A6BE3E894E3",
              "versionEndExcluding": "5.10.42",
              "versionStartIncluding": "5.8",
              "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/mlx5e: Fix null deref accessing lag dev\n\nIt could be the lag dev is null so stop processing the event.\nIn bond_enslave() the active/backup slave being set before setting the\nupper dev so first event is without an upper dev.\nAfter setting the upper dev with bond_master_upper_dev_link() there is\na second event and in that event we have an upper dev."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: net/mlx5e: corrigi\u00f3 el deref nulo al acceder a lag dev. Podr\u00eda ser que el lag dev sea nulo, as\u00ed que deje de procesar el evento. En bond_enslave(), el esclavo activo/de respaldo se configura antes de configurar el desarrollo superior, por lo que el primer evento es sin un desarrollo superior. Despu\u00e9s de configurar el desarrollo superior con bond_master_upper_dev_link() hay un segundo evento y en ese evento tenemos un desarrollo superior."
    }
  ],
  "id": "CVE-2021-47164",
  "lastModified": "2026-06-17T04:16:48.510",
  "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-2021-47164",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-03-28T18:24:43.257372Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-03-25T10:15:08.577",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/2e4b0b95a489259f9d35a3db17023061f8f3d587"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/83026d83186bc48bb41ee4872f339b83f31dfc55"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/bdfd3593a8248eea6ecfcbf7b47b56b86515672d"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/2e4b0b95a489259f9d35a3db17023061f8f3d587"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/83026d83186bc48bb41ee4872f339b83f31dfc55"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/bdfd3593a8248eea6ecfcbf7b47b56b86515672d"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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