FKIE_CVE-2018-12232

Vulnerability from fkie_nvd - Published: 2018-06-12 12:29 - Updated: 2026-06-17 01:37
Severity
5.9 (Medium) - CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
In net/socket.c in the Linux kernel through 4.17.1, there is a race condition between fchownat and close in cases where they target the same socket file descriptor, related to the sock_close and sockfs_setattr functions. fchownat does not increment the file descriptor reference count, which allows close to set the socket to NULL during fchownat's execution, leading to a NULL pointer dereference and system crash.
References
cve@mitre.orghttp://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6d8c50dcb029872b298eea68cc6209c866fd3e14Patch, Third Party Advisory
cve@mitre.orghttp://www.securityfocus.com/bid/104453Third Party Advisory, VDB Entry
cve@mitre.orghttps://access.redhat.com/errata/RHSA-2018:2948
cve@mitre.orghttps://github.com/torvalds/linux/commit/6d8c50dcb029872b298eea68cc6209c866fd3e14Patch, Third Party Advisory
cve@mitre.orghttps://lkml.org/lkml/2018/6/5/14Third Party Advisory
cve@mitre.orghttps://patchwork.ozlabs.org/patch/926519/Patch, Third Party Advisory
cve@mitre.orghttps://usn.ubuntu.com/3752-1/
cve@mitre.orghttps://usn.ubuntu.com/3752-2/
cve@mitre.orghttps://usn.ubuntu.com/3752-3/
af854a3a-2127-422b-91ae-364da2661108http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6d8c50dcb029872b298eea68cc6209c866fd3e14Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/104453Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108https://access.redhat.com/errata/RHSA-2018:2948
af854a3a-2127-422b-91ae-364da2661108https://github.com/torvalds/linux/commit/6d8c50dcb029872b298eea68cc6209c866fd3e14Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lkml.org/lkml/2018/6/5/14Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://patchwork.ozlabs.org/patch/926519/Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/3752-1/
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/3752-2/
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/3752-3/
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": "cve@mitre.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "5CF7338D-D530-4EEA-B1D6-926A91AC72BE",
              "versionEndIncluding": "4.17.1",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In net/socket.c in the Linux kernel through 4.17.1, there is a race condition between fchownat and close in cases where they target the same socket file descriptor, related to the sock_close and sockfs_setattr functions. fchownat does not increment the file descriptor reference count, which allows close to set the socket to NULL during fchownat\u0027s execution, leading to a NULL pointer dereference and system crash."
    },
    {
      "lang": "es",
      "value": "En net/socket.c en el kernel de Linux hasta la versi\u00f3n 4.17.1, hay una condici\u00f3n de carrera entre fchownat y close en los casos en los que apuntan al mismo descriptor de archivo socket. Esto est\u00e1 relacionado con las funciones sock_close y sockfs_setattr. fchownat no incrementa el conteo de referencia del descriptor de archivos, lo que permite que close establezca el socket como NULL durante la ejecuci\u00f3n de fchownat lo que conduce a una desreferencia de puntero NULL y a un cierre inesperado del sistema."
    }
  ],
  "id": "CVE-2018-12232",
  "lastModified": "2026-06-17T01:37:23.680",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "MEDIUM",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 7.1,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:C",
          "version": "2.0"
        },
        "exploitabilityScore": 8.6,
        "impactScore": 6.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 5.9,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.0"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2018-06-12T12:29:00.210",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Patch",
        "Third Party Advisory"
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    },
    {
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      ],
      "url": "http://www.securityfocus.com/bid/104453"
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    {
      "source": "cve@mitre.org",
      "url": "https://access.redhat.com/errata/RHSA-2018:2948"
    },
    {
      "source": "cve@mitre.org",
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    },
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    },
    {
      "source": "cve@mitre.org",
      "tags": [
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        "Third Party Advisory"
      ],
      "url": "https://patchwork.ozlabs.org/patch/926519/"
    },
    {
      "source": "cve@mitre.org",
      "url": "https://usn.ubuntu.com/3752-1/"
    },
    {
      "source": "cve@mitre.org",
      "url": "https://usn.ubuntu.com/3752-2/"
    },
    {
      "source": "cve@mitre.org",
      "url": "https://usn.ubuntu.com/3752-3/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6d8c50dcb029872b298eea68cc6209c866fd3e14"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "http://www.securityfocus.com/bid/104453"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://access.redhat.com/errata/RHSA-2018:2948"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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      "url": "https://github.com/torvalds/linux/commit/6d8c50dcb029872b298eea68cc6209c866fd3e14"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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      ],
      "url": "https://lkml.org/lkml/2018/6/5/14"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch",
        "Third Party Advisory"
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      "url": "https://patchwork.ozlabs.org/patch/926519/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://usn.ubuntu.com/3752-1/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://usn.ubuntu.com/3752-2/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://usn.ubuntu.com/3752-3/"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-362"
        }
      ],
      "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.
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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.



Related by attack behaviour

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