FKIE_CVE-2021-47311

Vulnerability from fkie_nvd - Published: 2024-05-21 15:15 - Updated: 2026-06-17 04:17
Severity
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: net: qcom/emac: fix UAF in emac_remove adpt is netdev private data and it cannot be used after free_netdev() call. Using adpt after free_netdev() can cause UAF bug. Fix it by moving free_netdev() at the end of the function.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/11e9d163d631198bb3eb41a677a61b499516c0f7Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2b70ca92847c619d6264c7372ef74fcbfd1e048cPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4d04a42b926e682140776e54188f4a44f1f01a81Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8a225a6e07a57a1538d53637cb3d82bd3e477839Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ad297cd2db8953e2202970e9504cab247b6c7cb4Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b1e091331920f8fbfc747dcbd16263fcd71abb2dPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b560521eca03d0a2db6093a5a632cbdd0a0cf833Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/11e9d163d631198bb3eb41a677a61b499516c0f7Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/2b70ca92847c619d6264c7372ef74fcbfd1e048cPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/4d04a42b926e682140776e54188f4a44f1f01a81Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/8a225a6e07a57a1538d53637cb3d82bd3e477839Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/ad297cd2db8953e2202970e9504cab247b6c7cb4Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b1e091331920f8fbfc747dcbd16263fcd71abb2dPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/b560521eca03d0a2db6093a5a632cbdd0a0cf833Patch
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 5.14
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/qualcomm/emac/emac.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "4d04a42b926e682140776e54188f4a44f1f01a81",
              "status": "affected",
              "version": "54e19bc74f3380d414681762ceed9f7245bc6a6e",
              "versionType": "git"
            },
            {
              "lessThan": "b1e091331920f8fbfc747dcbd16263fcd71abb2d",
              "status": "affected",
              "version": "54e19bc74f3380d414681762ceed9f7245bc6a6e",
              "versionType": "git"
            },
            {
              "lessThan": "11e9d163d631198bb3eb41a677a61b499516c0f7",
              "status": "affected",
              "version": "54e19bc74f3380d414681762ceed9f7245bc6a6e",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "54e19bc74f3380d414681762ceed9f7245bc6a6e",
              "versionType": "git"
            },
            {
              "lessThan": "b560521eca03d0a2db6093a5a632cbdd0a0cf833",
              "status": "affected",
              "version": "54e19bc74f3380d414681762ceed9f7245bc6a6e",
              "versionType": "git"
            },
            {
              "lessThan": "8a225a6e07a57a1538d53637cb3d82bd3e477839",
              "status": "affected",
              "version": "54e19bc74f3380d414681762ceed9f7245bc6a6e",
              "versionType": "git"
            },
            {
              "lessThan": "ad297cd2db8953e2202970e9504cab247b6c7cb4",
              "status": "affected",
              "version": "54e19bc74f3380d414681762ceed9f7245bc6a6e",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/qualcomm/emac/emac.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.9"
            },
            {
              "lessThan": "4.9",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.9.*",
              "status": "unaffected",
              "version": "4.9.277",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.241",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.199",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.135",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.13.*",
              "status": "unaffected",
              "version": "5.13.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.14",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "142407A7-68FB-47C1-A785-2A31ECA9EF8E",
              "versionEndExcluding": "4.9.277",
              "versionStartIncluding": "4.9",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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              "versionEndExcluding": "4.14.241",
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            {
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              "matchCriteriaId": "D1C5B0E1-06E7-4615-AA17-02585202D86E",
              "versionEndExcluding": "4.19.199",
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            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "3EF7BA79-262D-4A55-A0A1-E0D0BCA7C320",
              "versionEndExcluding": "5.4.135",
              "versionStartIncluding": "4.20",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "08E2D438-D50E-43C5-AF10-D62FE49B5815",
              "versionEndExcluding": "5.10.53",
              "versionStartIncluding": "5.5",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "808DF8D9-4913-4CC7-B91F-B4146556B7ED",
              "versionEndExcluding": "5.13.5",
              "versionStartIncluding": "5.11",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:5.14:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "71268287-21A8-4488-AA4F-23C473153131",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: qcom/emac: fix UAF in emac_remove\n\nadpt is netdev private data and it cannot be\nused after free_netdev() call. Using adpt after free_netdev()\ncan cause UAF bug. Fix it by moving free_netdev() at the end of the\nfunction."
    },
    {
      "lang": "es",
      "value": " En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: net: qcom/emac: corrige UAF en emac_remove adpt son datos privados de netdev y no se pueden usar despu\u00e9s de la llamada a free_netdev(). Usar adpt despu\u00e9s de free_netdev() puede causar un error en UAF. Solucionadlo moviendo free_netdev() al final de la funci\u00f3n."
    }
  ],
  "id": "CVE-2021-47311",
  "lastModified": "2026-06-17T04:17:09.953",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2021-47311",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-08-19T18:50:38.591727Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-05-21T15:15:18.590",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
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      ],
      "url": "https://git.kernel.org/stable/c/11e9d163d631198bb3eb41a677a61b499516c0f7"
    },
    {
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    },
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    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-416"
        }
      ],
      "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.