CVE-2022-33743 (GCVE-0-2022-33743)

Vulnerability from cvelistv5 – Published: 2022-07-05 12:50 – Updated: 2024-08-03 08:09
VLAI
Summary
network backend may cause Linux netfront to use freed SKBs While adding logic to support XDP (eXpress Data Path), a code label was moved in a way allowing for SKBs having references (pointers) retained for further processing to nevertheless be freed.
Severity
No CVSS data available.
CWE
  • unknown
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Unknown: consult Xen advisory XSA-405
Create a notification for this product.
Credits
{'credit_data': {'description': {'description_data': [{'lang': 'eng', 'value': 'This issue was discovered by Jan Beulich of SUSE.'}]}}}
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T08:09:22.607Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_refsource_MISC",
              "x_transferred"
            ],
            "url": "https://xenbits.xenproject.org/xsa/advisory-405.txt"
          },
          {
            "tags": [
              "x_refsource_CONFIRM",
              "x_transferred"
            ],
            "url": "http://xenbits.xen.org/xsa/advisory-405.html"
          },
          {
            "name": "[oss-security] 20220705 Xen Security Advisory 405 v3 (CVE-2022-33743) - network backend may cause Linux netfront to use freed SKBs",
            "tags": [
              "mailing-list",
              "x_refsource_MLIST",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2022/07/05/5"
          },
          {
            "name": "DSA-5191",
            "tags": [
              "vendor-advisory",
              "x_refsource_DEBIAN",
              "x_transferred"
            ],
            "url": "https://www.debian.org/security/2022/dsa-5191"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "Linux",
          "vendor": "Linux",
          "versions": [
            {
              "status": "unknown",
              "version": "consult Xen advisory XSA-405"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "{\u0027credit_data\u0027: {\u0027description\u0027: {\u0027description_data\u0027: [{\u0027lang\u0027: \u0027eng\u0027, \u0027value\u0027: \u0027This issue was discovered by Jan Beulich of SUSE.\u0027}]}}}"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "network backend may cause Linux netfront to use freed SKBs While adding logic to support XDP (eXpress Data Path), a code label was moved in a way allowing for SKBs having references (pointers) retained for further processing to nevertheless be freed."
        }
      ],
      "metrics": [
        {
          "other": {
            "content": {
              "description": {
                "description_data": [
                  {
                    "lang": "eng",
                    "value": "A misbehaving or malicious backend may cause a Denial of Service (DoS)\nin the guest.  Information leaks or privilege escalation cannot be\nruled out."
                  }
                ]
              }
            },
            "type": "unknown"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "unknown",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2022-07-27T10:06:51.000Z",
        "orgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
        "shortName": "XEN"
      },
      "references": [
        {
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://xenbits.xenproject.org/xsa/advisory-405.txt"
        },
        {
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "http://xenbits.xen.org/xsa/advisory-405.html"
        },
        {
          "name": "[oss-security] 20220705 Xen Security Advisory 405 v3 (CVE-2022-33743) - network backend may cause Linux netfront to use freed SKBs",
          "tags": [
            "mailing-list",
            "x_refsource_MLIST"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2022/07/05/5"
        },
        {
          "name": "DSA-5191",
          "tags": [
            "vendor-advisory",
            "x_refsource_DEBIAN"
          ],
          "url": "https://www.debian.org/security/2022/dsa-5191"
        }
      ],
      "x_legacyV4Record": {
        "CVE_data_meta": {
          "ASSIGNER": "security@xen.org",
          "ID": "CVE-2022-33743",
          "STATE": "PUBLIC"
        },
        "affects": {
          "vendor": {
            "vendor_data": [
              {
                "product": {
                  "product_data": [
                    {
                      "product_name": "Linux",
                      "version": {
                        "version_data": [
                          {
                            "version_affected": "?",
                            "version_value": "consult Xen advisory XSA-405"
                          }
                        ]
                      }
                    }
                  ]
                },
                "vendor_name": "Linux"
              }
            ]
          }
        },
        "configuration": {
          "configuration_data": {
            "description": {
              "description_data": [
                {
                  "lang": "eng",
                  "value": "Linux versions 5.9 - 5.18 are vulnerable.  Linux versions 5.8 and\nearlier are not vulnerable.\n\nThis vulnerability only increases the capability of an attacker in systems\nwith less than fully privileged network backends (e.g. network driver\ndomains).  For systems where netback runs in dom0 (the default\nconfiguration), this vulnerability does not increase the capabilities of\nan attacker."
                }
              ]
            }
          }
        },
        "credit": {
          "credit_data": {
            "description": {
              "description_data": [
                {
                  "lang": "eng",
                  "value": "This issue was discovered by Jan Beulich of SUSE."
                }
              ]
            }
          }
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "lang": "eng",
              "value": "network backend may cause Linux netfront to use freed SKBs While adding logic to support XDP (eXpress Data Path), a code label was moved in a way allowing for SKBs having references (pointers) retained for further processing to nevertheless be freed."
            }
          ]
        },
        "impact": {
          "impact_data": {
            "description": {
              "description_data": [
                {
                  "lang": "eng",
                  "value": "A misbehaving or malicious backend may cause a Denial of Service (DoS)\nin the guest.  Information leaks or privilege escalation cannot be\nruled out."
                }
              ]
            }
          }
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "eng",
                  "value": "unknown"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "https://xenbits.xenproject.org/xsa/advisory-405.txt",
              "refsource": "MISC",
              "url": "https://xenbits.xenproject.org/xsa/advisory-405.txt"
            },
            {
              "name": "http://xenbits.xen.org/xsa/advisory-405.html",
              "refsource": "CONFIRM",
              "url": "http://xenbits.xen.org/xsa/advisory-405.html"
            },
            {
              "name": "[oss-security] 20220705 Xen Security Advisory 405 v3 (CVE-2022-33743) - network backend may cause Linux netfront to use freed SKBs",
              "refsource": "MLIST",
              "url": "http://www.openwall.com/lists/oss-security/2022/07/05/5"
            },
            {
              "name": "DSA-5191",
              "refsource": "DEBIAN",
              "url": "https://www.debian.org/security/2022/dsa-5191"
            }
          ]
        },
        "workaround": {
          "workaround_data": {
            "description": {
              "description_data": [
                {
                  "lang": "eng",
                  "value": "There is no mitigation available other than not using PV devices in case\na backend is suspected to be potentially malicious."
                }
              ]
            }
          }
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
    "assignerShortName": "XEN",
    "cveId": "CVE-2022-33743",
    "datePublished": "2022-07-05T12:50:19.000Z",
    "dateReserved": "2022-06-15T00:00:00.000Z",
    "dateUpdated": "2024-08-03T08:09:22.607Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2022-33743",
      "date": "2026-10-12",
      "epss": "0.00353",
      "percentile": "0.27006"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "Linux",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "unknown",
                    "version": "consult Xen advisory XSA-405"
                  }
                ]
              }
            ],
            "source": "security@xen.org"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "5CD32F0B-F455-46C3-B510-AD6FC97DC3A2",
                    "versionEndIncluding": "5.18",
                    "versionStartIncluding": "5.9",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:xen:xen:-:*:*:*:*:*:*:*",
                    "matchCriteriaId": "BFA1950D-1D9F-4401-AA86-CF3028EFD286",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          },
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*",
                    "matchCriteriaId": "FA6FEEC2-9F11-4643-8827-749718254FED",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "network backend may cause Linux netfront to use freed SKBs While adding logic to support XDP (eXpress Data Path), a code label was moved in a way allowing for SKBs having references (pointers) retained for further processing to nevertheless be freed."
          },
          {
            "lang": "es",
            "value": "El backend de la red puede hacer que Linux netfront use SKB liberados Al agregar l\u00f3gica para admitir XDP (ruta de datos eXpress), se movi\u00f3 una etiqueta de c\u00f3digo de una manera que permit\u00eda que los SKB tuvieran referencias (punteros) retenidas para un procesamiento posterior para, no obstante, ser liberados"
          }
        ],
        "id": "CVE-2022-33743",
        "lastModified": "2026-06-17T04:49:21.577",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "MEDIUM",
              "cvssData": {
                "accessComplexity": "LOW",
                "accessVector": "LOCAL",
                "authentication": "NONE",
                "availabilityImpact": "PARTIAL",
                "baseScore": 4.6,
                "confidentialityImpact": "PARTIAL",
                "integrityImpact": "PARTIAL",
                "vectorString": "AV:L/AC:L/Au:N/C:P/I:P/A:P",
                "version": "2.0"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 6.4,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ],
          "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"
            }
          ]
        },
        "published": "2022-07-05T13:15:08.613",
        "references": [
          {
            "source": "security@xen.org",
            "tags": [
              "Mailing List",
              "Patch",
              "Third Party Advisory"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2022/07/05/5"
          },
          {
            "source": "security@xen.org",
            "tags": [
              "Patch",
              "Vendor Advisory"
            ],
            "url": "http://xenbits.xen.org/xsa/advisory-405.html"
          },
          {
            "source": "security@xen.org",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://www.debian.org/security/2022/dsa-5191"
          },
          {
            "source": "security@xen.org",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "https://xenbits.xenproject.org/xsa/advisory-405.txt"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List",
              "Patch",
              "Third Party Advisory"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2022/07/05/5"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch",
              "Vendor Advisory"
            ],
            "url": "http://xenbits.xen.org/xsa/advisory-405.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://www.debian.org/security/2022/dsa-5191"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Vendor Advisory"
            ],
            "url": "https://xenbits.xenproject.org/xsa/advisory-405.txt"
          }
        ],
        "sourceIdentifier": "security@xen.org",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "NVD-CWE-noinfo"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2025-11-21T15:39:42+00:00",
      "cve": "CVE-2022-33743",
      "id": "CVE-2022-33743",
      "initial_release_date": "2022-07-04T09:00:00+00:00",
      "product_status:fixed": "453",
      "product_status:known_not_affected": "114",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: network backend may cause Linux netfront to use freed SKBs (XSA-405)",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-33743.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-10-09T01:32:02Z",
      "cve": "CVE-2022-33743",
      "id": "CVE-2022-33743",
      "initial_release_date": "2023-02-15T03:25:05Z",
      "product_status:known_affected": "259",
      "product_status:known_not_affected": "683",
      "product_status:recommended": "644",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-33743",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-33743.json",
      "version": "43"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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.



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.