CVE-2011-2512

Status: ModifiedMedium (5.8)—

The virtio_queue_notify in qemu-kvm 0.14.0 and earlier does not properly validate the virtqueue number, which allows guest users to cause a denial of service (guest crash) and possibly execute arbitrary code via a negative number in the Queue Notify field of the Virtio Header, which bypasses a signed comparison.

CVSS

Version: 2.0
Vector: AV:A/AC:L/Au:N/C:P/I:P/A:P
Base score: 5.8

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 1.90%
Percentile among all scored CVEs: 79
Score date: 10/5/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

KVM Group — Qemu-kvm

CWEs

CWE-20

References

Raw JSON (NVD)

Show

{
  "id": "CVE-2011-2512",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5.8,
          "accessVector": "ADJACENT_NETWORK",
          "vectorString": "AV:A/AC:L/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "PARTIAL"
        },
        "acInsufInfo": false,
        "impactScore": 6.4,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 6.5,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "affected": [
    {
      "source": "secalert@redhat.com",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2012-06-21T15:55:09.740",
  "references": [
    {
      "url": "http://git.kernel.org/?p=virt/kvm/qemu-kvm.git%3Ba=commitdiff%3Bh=7157e2e23e89adcd436caeab31fdd6b47eded377",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://lists.opensuse.org/opensuse-security-announce/2011-07/msg00007.html",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://rhn.redhat.com/errata/RHSA-2011-0919.html",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://secunia.com/advisories/44458",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://secunia.com/advisories/44648",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://secunia.com/advisories/45158",
      "tags": [
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      "source": "secalert@redhat.com"
    },
    {
      "url": "http://secunia.com/advisories/45170",
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      "source": "secalert@redhat.com"
    },
    {
      "url": "http://secunia.com/advisories/45301",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://ubuntu.com/usn/usn-1165-1",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2011/06/28/13",
      "tags": [
        "Patch"
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      "source": "secalert@redhat.com"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2011/06/29/15",
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      "source": "secalert@redhat.com"
    },
    {
      "url": "http://www.osvdb.org/74751",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://hermes.opensuse.org/messages/9605323",
      "source": "secalert@redhat.com"
    },
    {
      "url": "https://www.debian.org/security/2011/dsa-2270",
      "source": "secalert@redhat.com"
    },
    {
      "url": "http://git.kernel.org/?p=virt/kvm/qemu-kvm.git%3Ba=commitdiff%3Bh=7157e2e23e89adcd436caeab31fdd6b47eded377",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://lists.opensuse.org/opensuse-security-announce/2011-07/msg00007.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://rhn.redhat.com/errata/RHSA-2011-0919.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://secunia.com/advisories/44458",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://secunia.com/advisories/44648",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://secunia.com/advisories/45158",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://secunia.com/advisories/45170",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://secunia.com/advisories/45301",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://ubuntu.com/usn/usn-1165-1",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2011/06/28/13",
      "tags": [
        "Patch"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.openwall.com/lists/oss-security/2011/06/29/15",
      "tags": [
        "Patch"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.osvdb.org/74751",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://hermes.opensuse.org/messages/9605323",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.debian.org/security/2011/dsa-2270",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "The virtio_queue_notify in qemu-kvm 0.14.0 and earlier does not properly validate the virtqueue number, which allows guest users to cause a denial of service (guest crash) and possibly execute arbitrary code via a negative number in the Queue Notify field of the Virtio Header, which bypasses a signed comparison."
    },
    {
      "lang": "es",
      "value": "virtio_queue_notify en qemu-kvm v0.14.0 y anteriores no valida correctamente el número virtqueue, lo que permite que los usuarios invitados puedan causar una denegación de servicio y posiblemente ejecutar código de su elección a través de un número negativo en el campo 'Queue Notify' de la cabecera Virtio, lo cual se salta una comparación de signo."
    }
  ],
  "lastModified": "2026-06-16T23:31:29.383",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:kvm_group:qemu-kvm:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A32F37FD-F3EC-44B6-B428-5E7F5E79A095",
              "versionEndIncluding": "0.14.0"
            },
            {
              "criteria": "cpe:2.3:a:kvm_group:qemu-kvm:0.12:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A7E67322-2B2B-450B-B16F-67673557F8E1"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "secalert@redhat.com"
}