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FKIE_CVE-2015-8952

Vulnerability from fkie_nvd - Published: 2016-10-16 21:59 - Updated: 2026-06-17 00:35
Summary
The mbcache feature in the ext2 and ext4 filesystem implementations in the Linux kernel before 4.6 mishandles xattr block caching, which allows local users to cause a denial of service (soft lockup) via filesystem operations in environments that use many attributes, as demonstrated by Ceph and Samba.
References
cve@mitre.orghttp://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=82939d7999dfc1f1998c4b1c12e2f19edbdff272Patch
cve@mitre.orghttp://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=be0726d33cb8f411945884664924bed3cb8c70eePatch
cve@mitre.orghttp://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f9a61eb4e2471c56a63cd804c7474128138c38acPatch
cve@mitre.orghttp://www.openwall.com/lists/oss-security/2016/08/22/2Third Party Advisory
cve@mitre.orghttp://www.openwall.com/lists/oss-security/2016/08/25/4Patch, Third Party Advisory
cve@mitre.orghttps://bugzilla.kernel.org/show_bug.cgi?id=107301Issue Tracking, Third Party Advisory
cve@mitre.orghttps://bugzilla.redhat.com/show_bug.cgi?id=1360968Issue Tracking, Third Party Advisory, VDB Entry
cve@mitre.orghttps://github.com/torvalds/linux/commit/82939d7999dfc1f1998c4b1c12e2f19edbdff272Vendor Advisory
cve@mitre.orghttps://github.com/torvalds/linux/commit/be0726d33cb8f411945884664924bed3cb8c70eeIssue Tracking, Patch
cve@mitre.orghttps://github.com/torvalds/linux/commit/f9a61eb4e2471c56a63cd804c7474128138c38acIssue Tracking
cve@mitre.orghttps://lwn.net/Articles/668718/Third Party Advisory
cve@mitre.orghttps://usn.ubuntu.com/3582-1/
cve@mitre.orghttps://usn.ubuntu.com/3582-2/
af854a3a-2127-422b-91ae-364da2661108http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=82939d7999dfc1f1998c4b1c12e2f19edbdff272Patch
af854a3a-2127-422b-91ae-364da2661108http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=be0726d33cb8f411945884664924bed3cb8c70eePatch
af854a3a-2127-422b-91ae-364da2661108http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f9a61eb4e2471c56a63cd804c7474128138c38acPatch
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2016/08/22/2Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2016/08/25/4Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.kernel.org/show_bug.cgi?id=107301Issue Tracking, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=1360968Issue Tracking, Third Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108https://github.com/torvalds/linux/commit/82939d7999dfc1f1998c4b1c12e2f19edbdff272Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108https://github.com/torvalds/linux/commit/be0726d33cb8f411945884664924bed3cb8c70eeIssue Tracking, Patch
af854a3a-2127-422b-91ae-364da2661108https://github.com/torvalds/linux/commit/f9a61eb4e2471c56a63cd804c7474128138c38acIssue Tracking
af854a3a-2127-422b-91ae-364da2661108https://lwn.net/Articles/668718/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/3582-1/
af854a3a-2127-422b-91ae-364da2661108https://usn.ubuntu.com/3582-2/
Impacted products
Vendor Product Version
linux linux_kernel *

{
  "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": "02606D90-EB6B-45DE-B022-6E5783BD64FA",
              "versionEndIncluding": "4.5.7",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "The mbcache feature in the ext2 and ext4 filesystem implementations in the Linux kernel before 4.6 mishandles xattr block caching, which allows local users to cause a denial of service (soft lockup) via filesystem operations in environments that use many attributes, as demonstrated by Ceph and Samba."
    },
    {
      "lang": "es",
      "value": "La funcionalidad mbcache en las implementaciones del sistema de archivos ext2 y ext4 en el kernel de Linux en versiones anteriores a 4.6 no maneja adecuadamente bloque de almacenamiento en cach\u00e9 xattr, lo que permite a usuarios locales provocar una denegaci\u00f3n de servicio (bloqueo d\u00e9bil) a trav\u00e9s de operaciones de sistema de archivos en entornos que usan muchos atributos, como se demuestra por Ceph y Samba."
    }
  ],
  "id": "CVE-2015-8952",
  "lastModified": "2026-06-17T00:35:33.167",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": true,
        "baseSeverity": "LOW",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "LOCAL",
          "authentication": "NONE",
          "availabilityImpact": "PARTIAL",
          "baseScore": 2.1,
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "vectorString": "AV:L/AC:L/Au:N/C:N/I:N/A:P",
          "version": "2.0"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.0"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ]
  },
  "published": "2016-10-16T21:59:01.910",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Patch"
      ],
      "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=82939d7999dfc1f1998c4b1c12e2f19edbdff272"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Patch"
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    },
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      "tags": [
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    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "http://www.openwall.com/lists/oss-security/2016/08/22/2"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Patch",
        "Third Party Advisory"
      ],
      "url": "http://www.openwall.com/lists/oss-security/2016/08/25/4"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Issue Tracking",
        "Third Party Advisory"
      ],
      "url": "https://bugzilla.kernel.org/show_bug.cgi?id=107301"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Issue Tracking",
        "Third Party Advisory",
        "VDB Entry"
      ],
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1360968"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
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      ],
      "url": "https://github.com/torvalds/linux/commit/82939d7999dfc1f1998c4b1c12e2f19edbdff272"
    },
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      "source": "cve@mitre.org",
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      "url": "https://github.com/torvalds/linux/commit/be0726d33cb8f411945884664924bed3cb8c70ee"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Issue Tracking"
      ],
      "url": "https://github.com/torvalds/linux/commit/f9a61eb4e2471c56a63cd804c7474128138c38ac"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Third Party Advisory"
      ],
      "url": "https://lwn.net/Articles/668718/"
    },
    {
      "source": "cve@mitre.org",
      "url": "https://usn.ubuntu.com/3582-1/"
    },
    {
      "source": "cve@mitre.org",
      "url": "https://usn.ubuntu.com/3582-2/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=82939d7999dfc1f1998c4b1c12e2f19edbdff272"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
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    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f9a61eb4e2471c56a63cd804c7474128138c38ac"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
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      ],
      "url": "http://www.openwall.com/lists/oss-security/2016/08/22/2"
    },
    {
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    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
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      ],
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    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Issue Tracking",
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      ],
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1360968"
    },
    {
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    },
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    },
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    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
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      "url": "https://lwn.net/Articles/668718/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://usn.ubuntu.com/3582-1/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://usn.ubuntu.com/3582-2/"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-19"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}



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