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CVE-2022-42319

Estado: ModificadaMedia (6.5)—

Xenstore: Los invitados pueden hacer que Xenstore no libere memoria temporal Cuando trabaja en una solicitud de un invitado, es posible que xenstored necesite asignar cantidades bastante grandes de memoria temporalmente. Esta memoria se libera sólo después de que la solicitud haya finalizado por completo. Una solicitud se considera finalizada sólo después de que el huésped haya leído el mensaje de respuesta de la solicitud desde la página de timbre. Por lo tanto, un invitado que no lea la respuesta puede hacer que xenstored no libere la memoria temporal. Esto puede provocar escasez de memoria y provocar Denegación de Servicio (DoS) de xenstored.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (3)

Debian — Debian LinuxFedoraproject — FedoraXEN — XEN

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2022-42319",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "CHANGED",
          "version": "3.1",
          "baseScore": 6.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 4,
        "exploitabilityScore": 2
      }
    ]
  },
  "affected": [
    {
      "source": "security@xen.org",
      "affectedData": [
        {
          "vendor": "Xen",
          "product": "xen",
          "versions": [
            {
              "status": "unknown",
              "version": "consult Xen advisory XSA-416"
            }
          ]
        }
      ]
    }
  ],
  "published": "2022-11-01T13:15:11.763",
  "references": [
    {
      "url": "http://www.openwall.com/lists/oss-security/2022/11/01/6",
      "tags": [
        "Mailing List",
        "Third Party Advisory"
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    },
    {
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      "tags": [
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        "Vendor Advisory"
      ],
      "source": "security@xen.org"
    },
    {
      "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YTMITQBGC23MSDHUCAPCVGLMVXIBXQTQ/",
      "source": "security@xen.org"
    },
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      "source": "security@xen.org"
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    {
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      "source": "security@xen.org"
    },
    {
      "url": "https://security.gentoo.org/glsa/202402-07",
      "source": "security@xen.org"
    },
    {
      "url": "https://www.debian.org/security/2022/dsa-5272",
      "tags": [
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      "source": "security@xen.org"
    },
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      "tags": [
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        "Vendor Advisory"
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      "source": "security@xen.org"
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    },
    {
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
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    },
    {
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      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://security.gentoo.org/glsa/202402-07",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.debian.org/security/2022/dsa-5272",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://xenbits.xenproject.org/xsa/advisory-416.txt",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-401"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Xenstore: Guests can cause Xenstore to not free temporary memory When working on a request of a guest, xenstored might need to allocate quite large amounts of memory temporarily. This memory is freed only after the request has been finished completely. A request is regarded to be finished only after the guest has read the response message of the request from the ring page. Thus a guest not reading the response can cause xenstored to not free the temporary memory. This can result in memory shortages causing Denial of Service (DoS) of xenstored."
    },
    {
      "lang": "es",
      "value": "Xenstore: Los invitados pueden hacer que Xenstore no libere memoria temporal Cuando trabaja en una solicitud de un invitado, es posible que xenstored necesite asignar cantidades bastante grandes de memoria temporalmente. Esta memoria se libera sólo después de que la solicitud haya finalizado por completo. Una solicitud se considera finalizada sólo después de que el huésped haya leído el mensaje de respuesta de la solicitud desde la página de timbre. Por lo tanto, un invitado que no lea la respuesta puede hacer que xenstored no libere la memoria temporal. Esto puede provocar escasez de memoria y provocar Denegación de Servicio (DoS) de xenstored."
    }
  ],
  "lastModified": "2026-06-17T05:04:43.020",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:xen:xen:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "49311C62-4662-40C1-9F0D-B366D8C1379F",
              "versionStartIncluding": "4.9.0"
            }
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          "operator": "OR"
        }
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    },
    {
      "nodes": [
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            },
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  "sourceIdentifier": "security@xen.org"
}