GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

GSD-2015-8952

Vulnerability from gsd - Updated: 2023-12-13 01:20
Details
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.
Aliases
Aliases
CVE-2015-8952
To clipboard 

{
  "GSD": {
    "alias": "CVE-2015-8952",
    "description": "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.",
    "id": "GSD-2015-8952",
    "references": [
      "https://www.suse.com/security/cve/CVE-2015-8952.html",
      "https://ubuntu.com/security/CVE-2015-8952",
      "https://linux.oracle.com/cve/CVE-2015-8952.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2015-8952"
      ],
      "details": "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.",
      "id": "GSD-2015-8952",
      "modified": "2023-12-13T01:20:03.902629Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "cve@mitre.org",
        "ID": "CVE-2015-8952",
        "STATE": "PUBLIC"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "n/a",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "n/a"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "n/a"
            }
          ]
        }
      },
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "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."
          }
        ]
      },
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "n/a"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "https://bugzilla.redhat.com/show_bug.cgi?id=1360968",
            "refsource": "CONFIRM",
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1360968"
          },
          {
            "name": "https://github.com/torvalds/linux/commit/f9a61eb4e2471c56a63cd804c7474128138c38ac",
            "refsource": "CONFIRM",
            "url": "https://github.com/torvalds/linux/commit/f9a61eb4e2471c56a63cd804c7474128138c38ac"
          },
          {
            "name": "https://github.com/torvalds/linux/commit/82939d7999dfc1f1998c4b1c12e2f19edbdff272",
            "refsource": "CONFIRM",
            "url": "https://github.com/torvalds/linux/commit/82939d7999dfc1f1998c4b1c12e2f19edbdff272"
          },
          {
            "name": "USN-3582-1",
            "refsource": "UBUNTU",
            "url": "https://usn.ubuntu.com/3582-1/"
          },
          {
            "name": "https://bugzilla.kernel.org/show_bug.cgi?id=107301",
            "refsource": "CONFIRM",
            "url": "https://bugzilla.kernel.org/show_bug.cgi?id=107301"
          },
          {
            "name": "[oss-security] 20160825 Re: CVE request: Linux kernel mbcache lock contention denial of service.",
            "refsource": "MLIST",
            "url": "http://www.openwall.com/lists/oss-security/2016/08/25/4"
          },
          {
            "name": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=82939d7999dfc1f1998c4b1c12e2f19edbdff272",
            "refsource": "CONFIRM",
            "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=82939d7999dfc1f1998c4b1c12e2f19edbdff272"
          },
          {
            "name": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=be0726d33cb8f411945884664924bed3cb8c70ee",
            "refsource": "CONFIRM",
            "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=be0726d33cb8f411945884664924bed3cb8c70ee"
          },
          {
            "name": "[oss-security] 20160822 CVE request: Linux kernel mbcache lock contention denial of service.",
            "refsource": "MLIST",
            "url": "http://www.openwall.com/lists/oss-security/2016/08/22/2"
          },
          {
            "name": "https://github.com/torvalds/linux/commit/be0726d33cb8f411945884664924bed3cb8c70ee",
            "refsource": "CONFIRM",
            "url": "https://github.com/torvalds/linux/commit/be0726d33cb8f411945884664924bed3cb8c70ee"
          },
          {
            "name": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f9a61eb4e2471c56a63cd804c7474128138c38ac",
            "refsource": "CONFIRM",
            "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f9a61eb4e2471c56a63cd804c7474128138c38ac"
          },
          {
            "name": "https://lwn.net/Articles/668718/",
            "refsource": "CONFIRM",
            "url": "https://lwn.net/Articles/668718/"
          },
          {
            "name": "USN-3582-2",
            "refsource": "UBUNTU",
            "url": "https://usn.ubuntu.com/3582-2/"
          }
        ]
      }
    },
    "nvd.nist.gov": {
      "configurations": {
        "CVE_data_version": "4.0",
        "nodes": [
          {
            "children": [],
            "cpe_match": [
              {
                "cpe23Uri": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                "cpe_name": [],
                "versionEndIncluding": "4.5.7",
                "vulnerable": true
              }
            ],
            "operator": "OR"
          }
        ]
      },
      "cve": {
        "CVE_data_meta": {
          "ASSIGNER": "cve@mitre.org",
          "ID": "CVE-2015-8952"
        },
        "data_format": "MITRE",
        "data_type": "CVE",
        "data_version": "4.0",
        "description": {
          "description_data": [
            {
              "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."
            }
          ]
        },
        "problemtype": {
          "problemtype_data": [
            {
              "description": [
                {
                  "lang": "en",
                  "value": "CWE-19"
                }
              ]
            }
          ]
        },
        "references": {
          "reference_data": [
            {
              "name": "[oss-security] 20160822 CVE request: Linux kernel mbcache lock contention denial of service.",
              "refsource": "MLIST",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "http://www.openwall.com/lists/oss-security/2016/08/22/2"
            },
            {
              "name": "https://bugzilla.redhat.com/show_bug.cgi?id=1360968",
              "refsource": "CONFIRM",
              "tags": [
                "Issue Tracking",
                "Third Party Advisory",
                "VDB Entry"
              ],
              "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1360968"
            },
            {
              "name": "https://lwn.net/Articles/668718/",
              "refsource": "CONFIRM",
              "tags": [
                "Third Party Advisory"
              ],
              "url": "https://lwn.net/Articles/668718/"
            },
            {
              "name": "https://github.com/torvalds/linux/commit/f9a61eb4e2471c56a63cd804c7474128138c38ac",
              "refsource": "CONFIRM",
              "tags": [
                "Issue Tracking"
              ],
              "url": "https://github.com/torvalds/linux/commit/f9a61eb4e2471c56a63cd804c7474128138c38ac"
            },
            {
              "name": "[oss-security] 20160825 Re: CVE request: Linux kernel mbcache lock contention denial of service.",
              "refsource": "MLIST",
              "tags": [
                "Patch",
                "Third Party Advisory"
              ],
              "url": "http://www.openwall.com/lists/oss-security/2016/08/25/4"
            },
            {
              "name": "https://github.com/torvalds/linux/commit/82939d7999dfc1f1998c4b1c12e2f19edbdff272",
              "refsource": "CONFIRM",
              "tags": [
                "Vendor Advisory"
              ],
              "url": "https://github.com/torvalds/linux/commit/82939d7999dfc1f1998c4b1c12e2f19edbdff272"
            },
            {
              "name": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f9a61eb4e2471c56a63cd804c7474128138c38ac",
              "refsource": "CONFIRM",
              "tags": [
                "Patch"
              ],
              "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f9a61eb4e2471c56a63cd804c7474128138c38ac"
            },
            {
              "name": "https://bugzilla.kernel.org/show_bug.cgi?id=107301",
              "refsource": "CONFIRM",
              "tags": [
                "Issue Tracking",
                "Third Party Advisory"
              ],
              "url": "https://bugzilla.kernel.org/show_bug.cgi?id=107301"
            },
            {
              "name": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=be0726d33cb8f411945884664924bed3cb8c70ee",
              "refsource": "CONFIRM",
              "tags": [
                "Patch"
              ],
              "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=be0726d33cb8f411945884664924bed3cb8c70ee"
            },
            {
              "name": "https://github.com/torvalds/linux/commit/be0726d33cb8f411945884664924bed3cb8c70ee",
              "refsource": "CONFIRM",
              "tags": [
                "Issue Tracking",
                "Patch"
              ],
              "url": "https://github.com/torvalds/linux/commit/be0726d33cb8f411945884664924bed3cb8c70ee"
            },
            {
              "name": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=82939d7999dfc1f1998c4b1c12e2f19edbdff272",
              "refsource": "CONFIRM",
              "tags": [
                "Patch"
              ],
              "url": "http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=82939d7999dfc1f1998c4b1c12e2f19edbdff272"
            },
            {
              "name": "USN-3582-2",
              "refsource": "UBUNTU",
              "tags": [],
              "url": "https://usn.ubuntu.com/3582-2/"
            },
            {
              "name": "USN-3582-1",
              "refsource": "UBUNTU",
              "tags": [],
              "url": "https://usn.ubuntu.com/3582-1/"
            }
          ]
        }
      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": true,
          "cvssV2": {
            "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,
          "severity": "LOW",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "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
        }
      },
      "lastModifiedDate": "2018-03-16T01:29Z",
      "publishedDate": "2016-10-16T21:59Z"
    }
  }
}



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.


Detection rules are retrieved from Rulezet.


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.