FKIE_CVE-2021-46991

Vulnerability from fkie_nvd - Published: 2024-02-28 09:15 - Updated: 2026-06-17 04:16
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: i40e: Fix use-after-free in i40e_client_subtask() Currently the call to i40e_client_del_instance frees the object pf->cinst, however pf->cinst->lan_info is being accessed after the free. Fix this by adding the missing return. Addresses-Coverity: ("Read from pointer after free")
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1fd5d262e7442192ac7611ff1597a36c5b044323Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/38318f23a7ef86a8b1862e5e8078c4de121960c3Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4ebc10aa7cd17fd9857dedac69600465c9dd16d1Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/829a713450b8fb127cbabfc1244c1d8179ec5107Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c1322eaeb8af0d8985b5cc5fa759140fa0e57b84Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d718c15a2bf9ae082d5ae4d177fb19ef23cb4132Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/1fd5d262e7442192ac7611ff1597a36c5b044323Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/38318f23a7ef86a8b1862e5e8078c4de121960c3Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/4ebc10aa7cd17fd9857dedac69600465c9dd16d1Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/829a713450b8fb127cbabfc1244c1d8179ec5107Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/c1322eaeb8af0d8985b5cc5fa759140fa0e57b84Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/d718c15a2bf9ae082d5ae4d177fb19ef23cb4132Patch
Impacted products
Vendor Product Version
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/ethernet/intel/i40e/i40e_client.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c1322eaeb8af0d8985b5cc5fa759140fa0e57b84",
              "status": "affected",
              "version": "7b0b1a6d0ac983ce1928432285d0222d4fb7c38b",
              "versionType": "git"
            },
            {
              "lessThan": "d718c15a2bf9ae082d5ae4d177fb19ef23cb4132",
              "status": "affected",
              "version": "7b0b1a6d0ac983ce1928432285d0222d4fb7c38b",
              "versionType": "git"
            },
            {
              "lessThan": "829a713450b8fb127cbabfc1244c1d8179ec5107",
              "status": "affected",
              "version": "7b0b1a6d0ac983ce1928432285d0222d4fb7c38b",
              "versionType": "git"
            },
            {
              "lessThan": "4ebc10aa7cd17fd9857dedac69600465c9dd16d1",
              "status": "affected",
              "version": "7b0b1a6d0ac983ce1928432285d0222d4fb7c38b",
              "versionType": "git"
            },
            {
              "lessThan": "1fd5d262e7442192ac7611ff1597a36c5b044323",
              "status": "affected",
              "version": "7b0b1a6d0ac983ce1928432285d0222d4fb7c38b",
              "versionType": "git"
            },
            {
              "lessThan": "38318f23a7ef86a8b1862e5e8078c4de121960c3",
              "status": "affected",
              "version": "7b0b1a6d0ac983ce1928432285d0222d4fb7c38b",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/intel/i40e/i40e_client.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.16"
            },
            {
              "lessThan": "4.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.191",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.120",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.38",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.11.*",
              "status": "unaffected",
              "version": "5.11.22",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.12.*",
              "status": "unaffected",
              "version": "5.12.5",
              "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": "F677F1C8-2451-43EC-9555-E283697C189E",
              "versionEndExcluding": "4.19.191",
              "versionStartIncluding": "4.16",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "2BDC71CF-4451-4D53-93E9-61DE7C4E25B0",
              "versionEndExcluding": "5.4.120",
              "versionStartIncluding": "4.20",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "2BB4E5E8-4AAD-475A-A1B9-F287254C7D72",
              "versionEndExcluding": "5.10.38",
              "versionStartIncluding": "5.5",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "83B53E9A-F426-4C03-9A5F-A931FF79827E",
              "versionEndExcluding": "5.11.22",
              "versionStartIncluding": "5.11",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "0274929A-B36C-4F4C-AB22-30A0DD6B995B",
              "versionEndExcluding": "5.12.5",
              "versionStartIncluding": "5.12",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ni40e: Fix use-after-free in i40e_client_subtask()\n\nCurrently the call to i40e_client_del_instance frees the object\npf-\u003ecinst, however pf-\u003ecinst-\u003elan_info is being accessed after\nthe free. Fix this by adding the missing return.\n\nAddresses-Coverity: (\"Read from pointer after free\")"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: i40e: Se corrige use-after-free en i40e_client_subtask() Actualmente la llamada a i40e_client_del_instance libera el objeto pf-\u0026gt;cinst, sin embargo se accede a pf-\u0026gt;cinst-\u0026gt;lan_info despu\u00e9s de gratis. Solucione este problema agregando la declaraci\u00f3n que falta. Direcciones-Cobertura: (\"Leer desde el puntero despu\u00e9s de estar libre\")"
    }
  ],
  "id": "CVE-2021-46991",
  "lastModified": "2026-06-17T04:16:06.270",
  "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-2021-46991",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-02-28T20:37:08.164275Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-02-28T09:15:37.787",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/1fd5d262e7442192ac7611ff1597a36c5b044323"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/38318f23a7ef86a8b1862e5e8078c4de121960c3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/4ebc10aa7cd17fd9857dedac69600465c9dd16d1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/829a713450b8fb127cbabfc1244c1d8179ec5107"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/c1322eaeb8af0d8985b5cc5fa759140fa0e57b84"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/d718c15a2bf9ae082d5ae4d177fb19ef23cb4132"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/1fd5d262e7442192ac7611ff1597a36c5b044323"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/38318f23a7ef86a8b1862e5e8078c4de121960c3"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/4ebc10aa7cd17fd9857dedac69600465c9dd16d1"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/829a713450b8fb127cbabfc1244c1d8179ec5107"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/c1322eaeb8af0d8985b5cc5fa759140fa0e57b84"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/d718c15a2bf9ae082d5ae4d177fb19ef23cb4132"
    }
  ],
  "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

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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.
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  • 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.