CVE-2022-26356 (GCVE-0-2022-26356)

Vulnerability from cvelistv5 – Published: 2022-04-05 00:00 – Updated: 2024-08-03 05:03
VLAI
Summary
Racy interactions between dirty vram tracking and paging log dirty hypercalls Activation of log dirty mode done by XEN_DMOP_track_dirty_vram (was named HVMOP_track_dirty_vram before Xen 4.9) is racy with ongoing log dirty hypercalls. A suitably timed call to XEN_DMOP_track_dirty_vram can enable log dirty while another CPU is still in the process of tearing down the structures related to a previously enabled log dirty mode (XEN_DOMCTL_SHADOW_OP_OFF). This is due to lack of mutually exclusive locking between both operations and can lead to entries being added in already freed slots, resulting in a memory leak.
Severity
No CVSS data available.
CWE
  • unknown
Assigner
References
Impacted products
Vendor Product Version
Xen xen Unknown: consult Xen advisory XSA-397
Create a notification for this product.
Credits
{'credit_data': {'description': {'description_data': [{'lang': 'eng', 'value': 'This issue was discovered by Roger Pau Monné of Citrix.'}]}}}
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-03T05:03:32.753Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://xenbits.xenproject.org/xsa/advisory-397.txt"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "http://xenbits.xen.org/xsa/advisory-397.html"
          },
          {
            "name": "[oss-security] 20220405 Xen Security Advisory 397 v2 (CVE-2022-26356) - Racy interactions between dirty vram tracking and paging log dirty hypercalls",
            "tags": [
              "mailing-list",
              "x_transferred"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2022/04/05/1"
          },
          {
            "name": "DSA-5117",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://www.debian.org/security/2022/dsa-5117"
          },
          {
            "name": "FEDORA-2022-dfbf7e2372",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UHFSRVLM2JUCPDC2KGB7ETPQYJLCGBLD/"
          },
          {
            "name": "FEDORA-2022-64b2c02d29",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6ETPM2OVZZ6KOS2L7QO7SIW6XWT5OW3F/"
          },
          {
            "name": "GLSA-202402-07",
            "tags": [
              "vendor-advisory",
              "x_transferred"
            ],
            "url": "https://security.gentoo.org/glsa/202402-07"
          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "xen",
          "vendor": "Xen",
          "versions": [
            {
              "status": "unknown",
              "version": "consult Xen advisory XSA-397"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "{\u0027credit_data\u0027: {\u0027description\u0027: {\u0027description_data\u0027: [{\u0027lang\u0027: \u0027eng\u0027, \u0027value\u0027: \u0027This issue was discovered by Roger Pau Monn\u00e9 of Citrix.\u0027}]}}}"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Racy interactions between dirty vram tracking and paging log dirty hypercalls Activation of log dirty mode done by XEN_DMOP_track_dirty_vram (was named HVMOP_track_dirty_vram before Xen 4.9) is racy with ongoing log dirty hypercalls. A suitably timed call to XEN_DMOP_track_dirty_vram can enable log dirty while another CPU is still in the process of tearing down the structures related to a previously enabled log dirty mode (XEN_DOMCTL_SHADOW_OP_OFF). This is due to lack of mutually exclusive locking between both operations and can lead to entries being added in already freed slots, resulting in a memory leak."
        }
      ],
      "metrics": [
        {
          "other": {
            "content": {
              "description": {
                "description_data": [
                  {
                    "lang": "eng",
                    "value": "An attacker can cause Xen to leak memory, eventually leading to a Denial of\nService (DoS) affecting the entire host."
                  }
                ]
              }
            },
            "type": "unknown"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "unknown",
              "lang": "en",
              "type": "text"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-02-04T08:06:38.987Z",
        "orgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
        "shortName": "XEN"
      },
      "references": [
        {
          "url": "https://xenbits.xenproject.org/xsa/advisory-397.txt"
        },
        {
          "url": "http://xenbits.xen.org/xsa/advisory-397.html"
        },
        {
          "name": "[oss-security] 20220405 Xen Security Advisory 397 v2 (CVE-2022-26356) - Racy interactions between dirty vram tracking and paging log dirty hypercalls",
          "tags": [
            "mailing-list"
          ],
          "url": "http://www.openwall.com/lists/oss-security/2022/04/05/1"
        },
        {
          "name": "DSA-5117",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://www.debian.org/security/2022/dsa-5117"
        },
        {
          "name": "FEDORA-2022-dfbf7e2372",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UHFSRVLM2JUCPDC2KGB7ETPQYJLCGBLD/"
        },
        {
          "name": "FEDORA-2022-64b2c02d29",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6ETPM2OVZZ6KOS2L7QO7SIW6XWT5OW3F/"
        },
        {
          "name": "GLSA-202402-07",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://security.gentoo.org/glsa/202402-07"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "23aa2041-22e1-471f-9209-9b7396fa234f",
    "assignerShortName": "XEN",
    "cveId": "CVE-2022-26356",
    "datePublished": "2022-04-05T00:00:00.000Z",
    "dateReserved": "2022-03-02T00:00:00.000Z",
    "dateUpdated": "2024-08-03T05:03:32.753Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2022-26356",
      "date": "2026-10-04",
      "epss": "0.00241",
      "percentile": "0.1385"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "xen",
                "vendor": "Xen",
                "versions": [
                  {
                    "status": "unknown",
                    "version": "consult Xen advisory XSA-397"
                  }
                ]
              }
            ],
            "source": "security@xen.org"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:*",
                    "matchCriteriaId": "D4199860-E11E-4F84-BA0C-A9CB463C7A74",
                    "versionEndExcluding": "4.12.0",
                    "versionStartIncluding": "4.0.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:*",
                    "matchCriteriaId": "F64332BF-1144-4924-8413-FA14FB0A94B6",
                    "versionEndExcluding": "4.14.0",
                    "versionStartIncluding": "4.13.0",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:xen:xen:*:*:*:*:*:*:x86:*",
                    "matchCriteriaId": "71566154-EA2A-4C5F-AC6A-8EFBD6159BB9",
                    "versionEndExcluding": "4.16.0",
                    "versionStartIncluding": "4.15.0",
                    "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"
              }
            ]
          },
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*",
                    "matchCriteriaId": "A930E247-0B43-43CB-98FF-6CE7B8189835",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*",
                    "matchCriteriaId": "80E516C0-98A4-4ADE-B69F-66A772E2BAAA",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Racy interactions between dirty vram tracking and paging log dirty hypercalls Activation of log dirty mode done by XEN_DMOP_track_dirty_vram (was named HVMOP_track_dirty_vram before Xen 4.9) is racy with ongoing log dirty hypercalls. A suitably timed call to XEN_DMOP_track_dirty_vram can enable log dirty while another CPU is still in the process of tearing down the structures related to a previously enabled log dirty mode (XEN_DOMCTL_SHADOW_OP_OFF). This is due to lack of mutually exclusive locking between both operations and can lead to entries being added in already freed slots, resulting in a memory leak."
          },
          {
            "lang": "es",
            "value": "Una activaci\u00f3n del modo de registro sucio realizada por XEN_DMOP_track_dirty_vram (es llamada HVMOP_track_dirty_vram antes de Xen versi\u00f3n 4.9) es producido con las hiperllamadas de registro sucio en curso. Una llamada a XEN_DMOP_track_dirty_vram con el tiempo apropiado puede habilitar log dirty mientras otra CPU est\u00e1 todav\u00eda en el proceso de desmontar las estructuras relacionadas con un modo log dirty previamente habilitado (XEN_DOMCTL_SHADOW_OP_OFF). Esto es debido a una falta de bloqueo mutuamente excluyente entre ambas operaciones y puede conllevar a que son a\u00f1adidas entradas en ranuras ya liberadas, dando lugar a una p\u00e9rdida de memoria"
          }
        ],
        "id": "CVE-2022-26356",
        "lastModified": "2026-06-17T04:35:02.697",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "MEDIUM",
              "cvssData": {
                "accessComplexity": "HIGH",
                "accessVector": "LOCAL",
                "authentication": "NONE",
                "availabilityImpact": "COMPLETE",
                "baseScore": 4.0,
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "vectorString": "AV:L/AC:H/Au:N/C:N/I:N/A:C",
                "version": "2.0"
              },
              "exploitabilityScore": 1.9,
              "impactScore": 6.9,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ],
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "HIGH",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 5.6,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "CHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.1,
              "impactScore": 4.0,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2022-04-05T13:15:07.727",
        "references": [
          {
            "source": "security@xen.org",
            "tags": [
              "Mailing List",
              "Patch",
              "Third Party Advisory"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2022/04/05/1"
          },
          {
            "source": "security@xen.org",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "http://xenbits.xen.org/xsa/advisory-397.html"
          },
          {
            "source": "security@xen.org",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6ETPM2OVZZ6KOS2L7QO7SIW6XWT5OW3F/"
          },
          {
            "source": "security@xen.org",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UHFSRVLM2JUCPDC2KGB7ETPQYJLCGBLD/"
          },
          {
            "source": "security@xen.org",
            "url": "https://security.gentoo.org/glsa/202402-07"
          },
          {
            "source": "security@xen.org",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://www.debian.org/security/2022/dsa-5117"
          },
          {
            "source": "security@xen.org",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://xenbits.xenproject.org/xsa/advisory-397.txt"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Mailing List",
              "Patch",
              "Third Party Advisory"
            ],
            "url": "http://www.openwall.com/lists/oss-security/2022/04/05/1"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Patch",
              "Third Party Advisory"
            ],
            "url": "http://xenbits.xen.org/xsa/advisory-397.html"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6ETPM2OVZZ6KOS2L7QO7SIW6XWT5OW3F/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UHFSRVLM2JUCPDC2KGB7ETPQYJLCGBLD/"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "url": "https://security.gentoo.org/glsa/202402-07"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://www.debian.org/security/2022/dsa-5117"
          },
          {
            "source": "af854a3a-2127-422b-91ae-364da2661108",
            "tags": [
              "Third Party Advisory"
            ],
            "url": "https://xenbits.xenproject.org/xsa/advisory-397.txt"
          }
        ],
        "sourceIdentifier": "security@xen.org",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-667"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    }
  }
}



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.