FKIE_CVE-2012-2121

Vulnerability from fkie_nvd - Published: 2012-05-17 11:00 - Updated: 2026-06-16 23:41
Severity
Summary
The KVM implementation in the Linux kernel before 3.3.4 does not properly manage the relationships between memory slots and the iommu, which allows guest OS users to cause a denial of service (memory leak and host OS crash) by leveraging administrative access to the guest OS to conduct hotunplug and hotplug operations on devices.
References
secalert@redhat.comhttp://rhn.redhat.com/errata/RHSA-2012-0676.html
secalert@redhat.comhttp://rhn.redhat.com/errata/RHSA-2012-0743.html
secalert@redhat.comhttp://secunia.com/advisories/50732
secalert@redhat.comhttp://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.3.4
secalert@redhat.comhttp://www.openwall.com/lists/oss-security/2012/04/19/16
secalert@redhat.comhttp://www.securitytracker.com/id?1027083
secalert@redhat.comhttp://www.ubuntu.com/usn/USN-1577-1
secalert@redhat.comhttp://www.ubuntu.com/usn/USN-2036-1
secalert@redhat.comhttp://www.ubuntu.com/usn/USN-2037-1
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=814149
secalert@redhat.comhttps://github.com/torvalds/linux/commit/09ca8e1173bcb12e2a449698c9ae3b86a8a10195
af854a3a-2127-422b-91ae-364da2661108http://rhn.redhat.com/errata/RHSA-2012-0676.html
af854a3a-2127-422b-91ae-364da2661108http://rhn.redhat.com/errata/RHSA-2012-0743.html
af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/50732
af854a3a-2127-422b-91ae-364da2661108http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.3.4
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2012/04/19/16
af854a3a-2127-422b-91ae-364da2661108http://www.securitytracker.com/id?1027083
af854a3a-2127-422b-91ae-364da2661108http://www.ubuntu.com/usn/USN-1577-1
af854a3a-2127-422b-91ae-364da2661108http://www.ubuntu.com/usn/USN-2036-1
af854a3a-2127-422b-91ae-364da2661108http://www.ubuntu.com/usn/USN-2037-1
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=814149
af854a3a-2127-422b-91ae-364da2661108https://github.com/torvalds/linux/commit/09ca8e1173bcb12e2a449698c9ae3b86a8a10195
Impacted products
Vendor Product Version
linux linux_kernel *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "secalert@redhat.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "6FF9F960-C2EA-4018-94CE-8D893CA8A7F9",
              "versionEndIncluding": "3.3.3",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The KVM implementation in the Linux kernel before 3.3.4 does not properly manage the relationships between memory slots and the iommu, which allows guest OS users to cause a denial of service (memory leak and host OS crash) by leveraging administrative access to the guest OS to conduct hotunplug and hotplug operations on devices."
    },
    {
      "lang": "es",
      "value": "La implementaci\u00f3n de KVM en el kernel de Linux en versiones anteriores a la v3.3.4 no gestiona correctamente la relaci\u00f3n entre las ranuras de memoria y el IOMMU, lo que permite causar una denegaci\u00f3n de servicio (ca\u00edda del sistema host) a los usuarios de sistemas operativos virtuales que funcionen bajo esa plataforma , aprovechandose del acceso de administraci\u00f3n a un sistema operativo invitado para llevar a cabo operaciones \u0027hotunplug\u0027 y \u0027hotplug\u0027 en los dispositivos."
    }
  ],
  "id": "CVE-2012-2121",
  "lastModified": "2026-06-16T23:41:01.990",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "LOCAL",
          "authentication": "NONE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 4.9,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:C",
          "version": "2.0"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 6.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ]
  },
  "published": "2012-05-17T11:00:38.210",
  "references": [
    {
      "source": "secalert@redhat.com",
      "url": "http://rhn.redhat.com/errata/RHSA-2012-0676.html"
    },
    {
      "source": "secalert@redhat.com",
      "url": "http://rhn.redhat.com/errata/RHSA-2012-0743.html"
    },
    {
      "source": "secalert@redhat.com",
      "url": "http://secunia.com/advisories/50732"
    },
    {
      "source": "secalert@redhat.com",
      "url": "http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.3.4"
    },
    {
      "source": "secalert@redhat.com",
      "url": "http://www.openwall.com/lists/oss-security/2012/04/19/16"
    },
    {
      "source": "secalert@redhat.com",
      "url": "http://www.securitytracker.com/id?1027083"
    },
    {
      "source": "secalert@redhat.com",
      "url": "http://www.ubuntu.com/usn/USN-1577-1"
    },
    {
      "source": "secalert@redhat.com",
      "url": "http://www.ubuntu.com/usn/USN-2036-1"
    },
    {
      "source": "secalert@redhat.com",
      "url": "http://www.ubuntu.com/usn/USN-2037-1"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=814149"
    },
    {
      "source": "secalert@redhat.com",
      "url": "https://github.com/torvalds/linux/commit/09ca8e1173bcb12e2a449698c9ae3b86a8a10195"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://rhn.redhat.com/errata/RHSA-2012-0676.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://rhn.redhat.com/errata/RHSA-2012-0743.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://secunia.com/advisories/50732"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.3.4"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.openwall.com/lists/oss-security/2012/04/19/16"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.securitytracker.com/id?1027083"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.ubuntu.com/usn/USN-1577-1"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.ubuntu.com/usn/USN-2036-1"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.ubuntu.com/usn/USN-2037-1"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=814149"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://github.com/torvalds/linux/commit/09ca8e1173bcb12e2a449698c9ae3b86a8a10195"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-264"
        }
      ],
      "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.