CVE-2015-8660

Status: ModifiedMedium (6.7)—Exploit

Severity6.7Medium · CVSS 3.1

Exploitation probability22 %higher than 98% of CVEs

Active exploitationNonot in the CISA catalog

Public exploitAvailablePublished on Exploit-DB · Proof of concept on GitHub (unverified) · Metasploit module (reliable, widely available exploit)

The ovl_setattr function in fs/overlayfs/inode.c in the Linux kernel through 4.3.3 attempts to merge distinct setattr operations, which allows local users to bypass intended access restrictions and modify the attributes of arbitrary overlay files via a crafted application.

CVSS

Base score: 6.7
Version: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 22 %
Percentile among all scored CVEs: 98
Score date: 10/20/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Public exploits

Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.

Metasploit module (reliable, widely available exploit) · Overlayfs Privilege Escalation
Published on Exploit-DB · Linux Kernel (Ubuntu / Fedora / RedHat) - 'Overlayfs' Local Privilege Escalation (Metasploit) (11/2/2016)
Published on Exploit-DB · Linux Kernel 4.3.3 - 'overlayfs' Local Privilege Escalation (2) (1/12/2016)
Published on Exploit-DB · Linux Kernel 4.3.3 (Ubuntu 14.04/15.10) - 'overlayfs' Local Privilege Escalation (1) (1/5/2016)
Proof of concept on GitHub (unverified) · List of proofs of concept on GitHub

⚠️ GitHub proofs of concept are not verified: some are fake or contain malware. Never run them outside an isolated lab.

Affected technologies (1)

Linux — Linux Kernel

CWEs

CWE-264

References

Show 46 references

Raw JSON (NVD)

Show

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    },
    {
      "lang": "es",
      "value": "La función ovl_setattr en fs/overlayfs/inode.c en el kernel de Linux hasta la versión 4.3.3 trata de fusionar distintas operaciones setattr, lo que permite a usuarios locales eludir las restricciones destinadas al acceso y modificar los atributos de archivos overlay arbitrarios a través de una aplicación manipulada."
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  "lastModified": "2026-06-17T00:34:59.407",
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