CVE-2021-26708 (GCVE-0-2021-26708)

Vulnerability from cvelistv5 – Published: 2021-02-05 07:41 – Updated: 2024-08-03 20:33
VLAI
Summary
A local privilege escalation was discovered in the Linux kernel before 5.10.13. Multiple race conditions in the AF_VSOCK implementation are caused by wrong locking in net/vmw_vsock/af_vsock.c. The race conditions were implicitly introduced in the commits that added VSOCK multi-transport support.
Severity
7.0 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
  • n/a
Assigner
mitre CNA under the mitre root
CNA scorecard E 28/100 over 2331 records in the last 180 days details
References
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T20:33:41.296Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c518adafa39f37858697ac9309c6cf1805581446"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.13"
          },
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://www.openwall.com/lists/oss-security/2021/02/04/5"
          },
          {
            "name": "[oss-security] 20210205 Re: Linux kernel: Exploitable vulnerabilities in AF_VSOCK implementation",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2021/02/05/6"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20210312-0008/"
          },
          {
            "name": "[oss-security] 20210409 Re: Linux kernel: Exploitable vulnerabilities in AF_VSOCK implementation",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2021/04/09/2"
          },
          {
            "name": "[oss-security] 20220125 CVE-2022-0185: Linux kernel slab out-of-bounds write: exploit and writeup",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2022/01/25/14"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A local privilege escalation was discovered in the Linux kernel before 5.10.13. Multiple race conditions in the AF_VSOCK implementation are caused by wrong locking in net/vmw_vsock/af_vsock.c. The race conditions were implicitly introduced in the commits that added VSOCK multi-transport support."
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "n/a",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-01-26T00:06:12.000Z",
        "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
        "shortName": "mitre"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c518adafa39f37858697ac9309c6cf1805581446"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.13"
        },
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://www.openwall.com/lists/oss-security/2021/02/04/5"
        },
        {
          "name": "[oss-security] 20210205 Re: Linux kernel: Exploitable vulnerabilities in AF_VSOCK implementation",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2021/02/05/6"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://security.netapp.com/advisory/ntap-20210312-0008/"
        },
        {
          "name": "[oss-security] 20210409 Re: Linux kernel: Exploitable vulnerabilities in AF_VSOCK implementation",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2021/04/09/2"
        },
        {
          "name": "[oss-security] 20220125 CVE-2022-0185: Linux kernel slab out-of-bounds write: exploit and writeup",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2022/01/25/14"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2021-26708",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "n/a",
                      "version": {
                        "version_data": [
                          {
                            "version_value": "n/a"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "n/a"
              }
            ]
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "A local privilege escalation was discovered in the Linux kernel before 5.10.13. Multiple race conditions in the AF_VSOCK implementation are caused by wrong locking in net/vmw_vsock/af_vsock.c. The race conditions were implicitly introduced in the commits that added VSOCK multi-transport support."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "n/a"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c518adafa39f37858697ac9309c6cf1805581446",
              "refsource": "MISC",
              "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c518adafa39f37858697ac9309c6cf1805581446"
            },
            {
              "name": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.13",
              "refsource": "MISC",
              "url": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.13"
            },
            {
              "name": "https://www.openwall.com/lists/oss-security/2021/02/04/5",
              "refsource": "MISC",
              "url": "https://www.openwall.com/lists/oss-security/2021/02/04/5"
            },
            {
              "name": "[oss-security] 20210205 Re: Linux kernel: Exploitable vulnerabilities in AF_VSOCK implementation",
              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2021/02/05/6"
            },
            {
              "name": "https://security.netapp.com/advisory/ntap-20210312-0008/",
              "refsource": "CONFIRM",
              "url": "https://security.netapp.com/advisory/ntap-20210312-0008/"
            },
            {
              "name": "[oss-security] 20210409 Re: Linux kernel: Exploitable vulnerabilities in AF_VSOCK implementation",
              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2021/04/09/2"
            },
            {
              "name": "[oss-security] 20220125 CVE-2022-0185: Linux kernel slab out-of-bounds write: exploit and writeup",
              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2022/01/25/14"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
    "assignerShortName": "mitre",
    "cveId": "CVE-2021-26708",
    "datePublished": "2021-02-05T07:41:12.000Z",
    "dateReserved": "2021-02-05T00:00:00.000Z",
    "dateUpdated": "2024-08-03T20:33:41.296Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2021-26708",
      "date": "2026-10-15",
      "epss": "0.01602",
      "percentile": "0.75362"
    },
    "microsoft_vex": {
      "current_release_date": "2021-02-11T00:00:00.000Z",
      "cve": "CVE-2021-26708",
      "id": "msrc_CVE-2021-26708",
      "initial_release_date": "2021-02-02T00:00:00.000Z",
      "product_status:fixed": "16",
      "product_status:known_affected": "16",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "A local privilege escalation was discovered in the Linux kernel before 5.10.13. Multiple race conditions in the AF_VSOCK implementation are caused by wrong locking in net/vmw_vsock/af_vsock.c. The race conditions were implicitly introduced in the commits that added VSOCK multi-transport support.",
      "url": "https://msrc.microsoft.com/csaf/vex/2021/msrc_cve-2021-26708.json",
      "version": "1"
    },
    "nvd": {
      "cve": {
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "3BAC0A75-D645-4EBB-AACE-66F1241386BE",
                    "versionEndExcluding": "5.10.13",
                    "versionStartIncluding": "5.5",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          },
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:a:netapp:aff_baseboard_management_controller:-:*:*:*:*:*:*:*",
                    "matchCriteriaId": "5C0ADE5D-F91D-4E0D-B6C5-3511B19665F1",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:netapp:cloud_backup:-:*:*:*:*:*:*:*",
                    "matchCriteriaId": "5C2089EE-5D7F-47EC-8EA5-0F69790564C4",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:netapp:fas_baseboard_management_controller:-:*:*:*:*:*:*:*",
                    "matchCriteriaId": "6DD5AF44-1C16-4F25-84C1-8AE3CD89B7B1",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:netapp:solidfire_\\\u0026_hci_management_node:-:*:*:*:*:*:*:*",
                    "matchCriteriaId": "D6D700C5-F67F-4FFB-BE69-D524592A3D2E",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:netapp:solidfire_baseboard_management_controller:-:*:*:*:*:*:*:*",
                    "matchCriteriaId": "83FAD281-BF77-4A8A-8F29-B557A6903BE0",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          },
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:netapp:baseboard_management_controller_500f_firmware:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "C89007F1-A34D-4C65-B563-22A34440B9F0",
                    "versionEndExcluding": "15.3",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              },
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:h:netapp:500f:-:*:*:*:*:*:*:*",
                    "matchCriteriaId": "F21DE67F-CDFD-4D36-9967-633CD0240C6F",
                    "vulnerable": false
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ],
            "operator": "AND"
          },
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:netapp:baseboard_management_controller_a250_firmware:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "3E596F9C-2F51-4D38-82B5-A934A482D58D",
                    "versionEndExcluding": "15.3",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              },
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:h:netapp:a250:-:*:*:*:*:*:*:*",
                    "matchCriteriaId": "281DFC67-46BB-4FC2-BE03-3C65C9311F65",
                    "vulnerable": false
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ],
            "operator": "AND"
          },
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:netapp:hci_h410c_firmware:-:*:*:*:*:*:*:*",
                    "matchCriteriaId": "08C564D8-E21F-403C-B4BB-7B14B7FB5DAE",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              },
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:h:netapp:hci_h410c:-:*:*:*:*:*:*:*",
                    "matchCriteriaId": "8532F5F0-00A1-4FA9-A80B-09E46D03F74F",
                    "vulnerable": false
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ],
            "operator": "AND"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "A local privilege escalation was discovered in the Linux kernel before 5.10.13. Multiple race conditions in the AF_VSOCK implementation are caused by wrong locking in net/vmw_vsock/af_vsock.c. The race conditions were implicitly introduced in the commits that added VSOCK multi-transport support."
          },
          {
            "lang": "es",
            "value": "Se detect\u00f3 una escalada de privilegios local en el kernel de Linux versiones anteriores a 5.10.13.\u0026#xa0;M\u00faltiples condiciones de carrera en la implementaci\u00f3n de AF_VSOCK son causadas mediante un bloqueo incorrecto en el archivo net/vmw_vsock / af_vsock.c.\u0026#xa0;Las condiciones de carrera se introdujeron impl\u00edcitamente en las commits que agregaron soporte de transporte m\u00faltiple de VSOCK"
          }
        ],
        "id": "CVE-2021-26708",
        "lastModified": "2024-11-21T05:56:42.880",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "MEDIUM",
              "cvssData": {
                "accessComplexity": "MEDIUM",
                "accessVector": "LOCAL",
                "authentication": "NONE",
                "availabilityImpact": "COMPLETE",
                "baseScore": 6.9,
                "confidentialityImpact": "COMPLETE",
                "integrityImpact": "COMPLETE",
                "vectorString": "AV:L/AC:M/Au:N/C:C/I:C/A:C",
                "version": "2.0"
              },
              "exploitabilityScore": 3.4,
              "impactScore": 10.0,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ],
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "HIGH",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.0,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.0,
              "impactScore": 5.9,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2021-02-05T14:15:18.780",
        "references": [
          {
            "source": "cve@mitre.org",
            "tags": [
              "Mailing List",
              "Patch",
              "Third Party Advisory"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2021/02/05/6"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Mailing List"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2021/04/09/2"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Mailing List"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2022/01/25/14"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Release Notes",
              "Vendor Advisory"
            ],
            "url": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.13"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Patch",
              "Vendor Advisory"
            ],
            "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c518adafa39f37858697ac9309c6cf1805581446"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20210312-0008/"
          },
          {
            "source": "cve@mitre.org",
            "tags": [
              "Mailing List",
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://www.openwall.com/lists/oss-security/2021/02/04/5"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List",
              "Patch",
              "Third Party Advisory"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2021/02/05/6"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2021/04/09/2"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2022/01/25/14"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Release Notes",
              "Vendor Advisory"
            ],
            "url": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.13"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch",
              "Vendor Advisory"
            ],
            "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c518adafa39f37858697ac9309c6cf1805581446"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://security.netapp.com/advisory/ntap-20210312-0008/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List",
              "Patch",
              "Third Party Advisory"
            ],
            "url": "https://www.openwall.com/lists/oss-security/2021/02/04/5"
          }
        ],
        "sourceIdentifier": "cve@mitre.org",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-667"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-06-28T11:40:37+00:00",
      "cve": "CVE-2021-26708",
      "id": "CVE-2021-26708",
      "initial_release_date": "2021-02-05T00:00:00+00:00",
      "product_status:fixed": "150",
      "product_status:known_not_affected": "149",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: race conditions caused by wrong locking in net/vmw_vsock/af_vsock.c",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-26708.json",
      "version": "3"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON

Loading timeline…




    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.