FKIE_CVE-2016-6197

Vulnerability from fkie_nvd - Published: 2016-08-06 20:59 - Updated: 2026-06-17 00:50
Severity
5.5 (Medium) - CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
fs/overlayfs/dir.c in the OverlayFS filesystem implementation in the Linux kernel before 4.6 does not properly verify the upper dentry before proceeding with unlink and rename system-call processing, which allows local users to cause a denial of service (system crash) via a rename system call that specifies a self-hardlink.
References
cve@mitre.orghttp://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=11f3710417d026ea2f4fcf362d866342c5274185Issue Tracking, Patch
cve@mitre.orghttp://rhn.redhat.com/errata/RHSA-2016-1847.html
cve@mitre.orghttp://rhn.redhat.com/errata/RHSA-2016-1875.html
cve@mitre.orghttp://www.openwall.com/lists/oss-security/2016/07/11/8Mailing List, Third Party Advisory
cve@mitre.orghttp://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.htmlThird Party Advisory
cve@mitre.orghttp://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.htmlVendor Advisory
cve@mitre.orghttp://www.securityfocus.com/bid/91709
cve@mitre.orghttp://www.securitytracker.com/id/1036273
cve@mitre.orghttp://www.ubuntu.com/usn/USN-3070-1
cve@mitre.orghttp://www.ubuntu.com/usn/USN-3070-2
cve@mitre.orghttp://www.ubuntu.com/usn/USN-3070-3
cve@mitre.orghttp://www.ubuntu.com/usn/USN-3070-4
cve@mitre.orghttps://bugzilla.redhat.com/show_bug.cgi?id=1355650Issue Tracking
cve@mitre.orghttps://github.com/torvalds/linux/commit/11f3710417d026ea2f4fcf362d866342c5274185Issue Tracking, Patch
af854a3a-2127-422b-91ae-364da2661108http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=11f3710417d026ea2f4fcf362d866342c5274185Issue Tracking, Patch
af854a3a-2127-422b-91ae-364da2661108http://rhn.redhat.com/errata/RHSA-2016-1847.html
af854a3a-2127-422b-91ae-364da2661108http://rhn.redhat.com/errata/RHSA-2016-1875.html
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2016/07/11/8Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.htmlThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.htmlVendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/91709
af854a3a-2127-422b-91ae-364da2661108http://www.securitytracker.com/id/1036273
af854a3a-2127-422b-91ae-364da2661108http://www.ubuntu.com/usn/USN-3070-1
af854a3a-2127-422b-91ae-364da2661108http://www.ubuntu.com/usn/USN-3070-2
af854a3a-2127-422b-91ae-364da2661108http://www.ubuntu.com/usn/USN-3070-3
af854a3a-2127-422b-91ae-364da2661108http://www.ubuntu.com/usn/USN-3070-4
af854a3a-2127-422b-91ae-364da2661108https://bugzilla.redhat.com/show_bug.cgi?id=1355650Issue Tracking
af854a3a-2127-422b-91ae-364da2661108https://github.com/torvalds/linux/commit/11f3710417d026ea2f4fcf362d866342c5274185Issue Tracking, Patch
Impacted products
Vendor Product Version
oracle linux 6
linux linux_kernel *
oracle vm_server 3.4
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
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      ],
      "source": "cve@mitre.org"
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  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "fs/overlayfs/dir.c in the OverlayFS filesystem implementation in the Linux kernel before 4.6 does not properly verify the upper dentry before proceeding with unlink and rename system-call processing, which allows local users to cause a denial of service (system crash) via a rename system call that specifies a self-hardlink."
    },
    {
      "lang": "es",
      "value": "fs/overlayfs/dir.c en la implementaci\u00f3n del sistema de archivos OverlayFS en el kernel de Linux en versiones anteriores a 4.6 no verifica adecuadamente la dentry superior antes de proceder con el procesamiento de desconexi\u00f3n y cambio de nombre de llamadas al sistema, lo que permite a usuarios locales provocar una denegaci\u00f3n del servicio (ca\u00edda de sistema) a trav\u00e9s de una llamada al sistema cambiada de nombre que especifica un self-hardlink."
    }
  ],
  "id": "CVE-2016-6197",
  "lastModified": "2026-06-17T00:50:37.223",
  "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
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    "cvssMetricV30": [
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          "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",
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        "impactScore": 3.6,
        "source": "nvd@nist.gov",
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  "published": "2016-08-06T20:59:12.067",
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          "value": "CWE-20"
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      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
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  ]
}



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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.
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