CVE-2015-8660

MEDIUMNVD 6.76.7—
EchelonGraph scoreMEDIUM confidence

Score 6.7 from GitHub Security Advisory (severity: HIGH) published 2022-05-17. NVD baseline CVSS 6.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Weaponized
6.7EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 22%CVSS: 6.7Exploit: Metasploit · Exploit-DB (verified) · epss top5pct · public exploitExposed services: Not assessed

A fix is available — apply it.

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 v3
6.7
EG Score
6.7MEDIUMmedium confidence
EG Risk
61
EG Risk 61/100CISA SSVC

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity67% × 45%
Exploitation65% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track* or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
22%
EPSS %ILE
97th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (EG-KEV: weaponized) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

December 28, 2015

Last Modified

May 6, 2026

References (46)

Patch Availability(8)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulinux-image-extra-3.19.0-43-generic (3.19.0-43.49~14.04.1) @ trusty2026-05-22ubuntu
ubuntulinux-image-3.19.0-43-powerpc-e500mc (3.19.0-43.49) @ vivid2026-05-22ubuntu
ubuntulinux-image-extra-4.2.0-23-generic (4.2.0-23.28~14.04.1) @ trusty2026-05-22ubuntu
ubuntulinux-image-4.2.0-1018-raspi2 (4.2.0-1018.25) @ wily2026-05-22ubuntu
ubuntulinux-image-4.2.0-23-powerpc-e500mc (4.2.0-23.28) @ wily2026-05-22ubuntu
redhatkernel-rt-0:3.10.0-327.28.2.rt56.234.el7_22016-08-02redhat
redhatkernel-0:3.10.0-327.28.2.el72016-08-02redhat
redhatkernel-rt-1:3.10.0-327.rt56.194.el6rt2016-08-02redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 4.3.3-3: fixed in 4.3.3-3
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 4.3.3-3: fixed in 4.3.3-3
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 4.3.3-3: fixed in 4.3.3-3
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 4.3.3-3: fixed in 4.3.3-3
—

All Vendor Advisories

(8)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 5× in last 7d / 19× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 144 total refreshes for this CVE.

  1. 2026-10-05 17:38 UTCEPSS rescore
  2. 2026-10-03 14:21 UTCEPSS rescore
  3. 2026-09-30 14:58 UTCEPSS rescore
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  5. 2026-09-30 09:08 UTCEG score recompute
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  11. 2026-09-19 05:36 UTCOSV refresh
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  24. 2026-08-31 08:58 UTCOSV refresh
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  1. 2026-08-26 14:41 UTCEPSS rescore
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  22. 2026-07-30 01:26 UTCEPSS rescore
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  29. 2026-07-23 01:20 UTCEG score recompute
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  31. 2026-07-22 22:00 UTCEG score recompute
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  45. 2026-07-12 13:07 UTCOSV refresh
  46. 2026-07-12 05:42 UTCEPSS rescore
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  48. 2026-07-09 19:05 UTCEPSS rescore
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  50. 2026-07-08 15:10 UTCEPSS rescore
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  71. 2026-06-22 14:23 UTCEPSS rescore
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  75. 2026-06-19 19:23 UTCEPSS rescore

Publicly available exploits

(5 references)

Working exploit code is in the public domain (1 Metasploit module) (1 GitHub PoC) (3 Exploit-DB entries). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-40688✓ verified
    First seen Nov 2, 2016

    Linux Kernel (Ubuntu / Fedora / RedHat) - 'Overlayfs' Local Privilege Escalation (Metasploit)

    Open source ↗
  • Exploit-DBEDB-39166✓ verified
    First seen Jan 5, 2016

    Linux Kernel 4.3.3 (Ubuntu 14.04/15.10) - 'overlayfs' Local Privilege Escalation (1)

    Open source ↗
  • Metasploitexploit/linux/local/overlayfs_priv_esc✓ verified
    First seen Jun 16, 2015

    Overlayfs Privilege Escalation

    Open source ↗
  • GitHub PoCwhu-enjoy/CVE-2015-8660
    First seen Apr 14, 2016

    这个代码包含了CVE-2015-8660漏洞的利用代码，还有注释，出现问题的源代码，打了补丁后的代码

    Open source ↗
  • Exploit-DBEDB-39230
    First seen Jan 12, 2016

    Linux Kernel 4.3.3 - 'overlayfs' Local Privilege Escalation (2)

    Open source ↗

Related CVEs(same vendor)

Same vendor

2 shown

redhat:RHSA-2016:1532 · redhat:RHSA-2016:1539

Frequently asked(5)

What is CVE-2015-8660?
CVE-2015-8660 is a medium vulnerability published on December 28, 2015. 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.
When was CVE-2015-8660 disclosed?
CVE-2015-8660 was first published on December 28, 2015, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2015-8660 actively exploited?
CVE-2015-8660 is not currently on CISA's Known Exploited Vulnerabilities catalog. EchelonGraph's EG-KEV model classifies it as weaponized: a functional public exploit exists. FIRST EPSS estimates a 22% probability of exploitation in the next 30 days (97th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2015-8660?
CVE-2015-8660 has a CVSS v3 base score of 6.7 (NVD).
How do I remediate CVE-2015-8660?
A fix for CVE-2015-8660 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

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