FKIE_CVE-2012-2136

Vulnerability from fkie_nvd - Published: 2012-08-09 10:29 - Updated: 2026-06-16 23:41
Severity
Summary
The sock_alloc_send_pskb function in net/core/sock.c in the Linux kernel before 3.4.5 does not properly validate a certain length value, which allows local users to cause a denial of service (heap-based buffer overflow and system crash) or possibly gain privileges by leveraging access to a TUN/TAP device.
References
secalert@redhat.comhttp://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=cc9b17ad29ecaa20bfe426a8d4dbfb94b13ff1ccBroken Link
secalert@redhat.comhttp://rhn.redhat.com/errata/RHSA-2012-0743.htmlThird Party Advisory, VDB Entry
secalert@redhat.comhttp://rhn.redhat.com/errata/RHSA-2012-1087.htmlThird Party Advisory
secalert@redhat.comhttp://secunia.com/advisories/50807URL Repurposed
secalert@redhat.comhttp://ubuntu.com/usn/usn-1529-1Third Party Advisory
secalert@redhat.comhttp://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.4.5Vendor Advisory
secalert@redhat.comhttp://www.securityfocus.com/bid/53721Third Party Advisory, VDB Entry
secalert@redhat.comhttp://www.ubuntu.com/usn/USN-1535-1Third Party Advisory
secalert@redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=816289Issue Tracking
secalert@redhat.comhttps://github.com/torvalds/linux/commit/cc9b17ad29ecaa20bfe426a8d4dbfb94b13ff1ccExploit, Patch
af854a3a-2127-422b-91ae-364da2661108http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=cc9b17ad29ecaa20bfe426a8d4dbfb94b13ff1ccBroken Link
af854a3a-2127-422b-91ae-364da2661108http://rhn.redhat.com/errata/RHSA-2012-0743.htmlThird Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://rhn.redhat.com/errata/RHSA-2012-1087.htmlThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/50807URL Repurposed
af854a3a-2127-422b-91ae-364da2661108http://ubuntu.com/usn/usn-1529-1Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.4.5Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/53721Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108http://www.ubuntu.com/usn/USN-1535-1Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=816289Issue Tracking
af854a3a-2127-422b-91ae-364da2661108https://github.com/torvalds/linux/commit/cc9b17ad29ecaa20bfe426a8d4dbfb94b13ff1ccExploit, Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
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": "11F3BF95-7AFA-4678-8F7C-1B29BDA05822",
              "versionEndExcluding": "3.0.37",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "8B4D48FD-F61E-4443-A0CD-A7A5D139C6D3",
              "versionEndExcluding": "3.2.23",
              "versionStartIncluding": "3.1",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "478D8BEC-1557-40DC-8AB2-42424B19D0A9",
              "versionEndExcluding": "3.4.5",
              "versionStartIncluding": "3.3",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The sock_alloc_send_pskb function in net/core/sock.c in the Linux kernel before 3.4.5 does not properly validate a certain length value, which allows local users to cause a denial of service (heap-based buffer overflow and system crash) or possibly gain privileges by leveraging access to a TUN/TAP device."
    },
    {
      "lang": "es",
      "value": "La funci\u00f3n sock_alloc_send_pskb en net/core/sock.c en el kernel de linux anterior a v3.4.5 no valida correctamente ciertos valores de longitud, permitiendo a usuarios locales causar una denegaci\u00f3n de servicio (desbordamiento de b\u00fafer basado en el heap o ca\u00edda del sistema) o ganar privilegios mediante el acceso a un dispositivo TUN/TAP"
    }
  ],
  "id": "CVE-2012-2136",
  "lastModified": "2026-06-16T23:41:03.817",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "LOCAL",
          "authentication": "NONE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 7.2,
          "confidentialityImpact": "COMPLETE",
          "integrityImpact": "COMPLETE",
          "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C",
          "version": "2.0"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 10.0,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ]
  },
  "published": "2012-08-09T10:29:46.870",
  "references": [
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Broken Link"
      ],
      "url": "http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=cc9b17ad29ecaa20bfe426a8d4dbfb94b13ff1cc"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "http://rhn.redhat.com/errata/RHSA-2012-0743.html"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "http://rhn.redhat.com/errata/RHSA-2012-1087.html"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
        "URL Repurposed"
      ],
      "url": "http://secunia.com/advisories/50807"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "http://ubuntu.com/usn/usn-1529-1"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.4.5"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "http://www.securityfocus.com/bid/53721"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "http://www.ubuntu.com/usn/USN-1535-1"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Issue Tracking"
      ],
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=816289"
    },
    {
      "source": "secalert@redhat.com",
      "tags": [
        "Exploit",
        "Patch"
      ],
      "url": "https://github.com/torvalds/linux/commit/cc9b17ad29ecaa20bfe426a8d4dbfb94b13ff1cc"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Broken Link"
      ],
      "url": "http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=cc9b17ad29ecaa20bfe426a8d4dbfb94b13ff1cc"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "http://rhn.redhat.com/errata/RHSA-2012-0743.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "http://rhn.redhat.com/errata/RHSA-2012-1087.html"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "URL Repurposed"
      ],
      "url": "http://secunia.com/advisories/50807"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "http://ubuntu.com/usn/usn-1529-1"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.4.5"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "http://www.securityfocus.com/bid/53721"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "http://www.ubuntu.com/usn/USN-1535-1"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Issue Tracking"
      ],
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=816289"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Exploit",
        "Patch"
      ],
      "url": "https://github.com/torvalds/linux/commit/cc9b17ad29ecaa20bfe426a8d4dbfb94b13ff1cc"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-20"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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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

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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.
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  • 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.



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