CVE-2015-8660

Exp

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.

Published: 2015-12-28 Last update: 2026-05-06 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2015-8660 is rated High Exploit Risk (70.9/100): CVSS Medium severity, with high exploitation likelihood (EPSS 22.37%, 97th percentile). 3 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2015-8660

EDB-ID Source Kind Published Link
40688 exploit_db edb 2016-11-02 Exploit-DB ↗
39230 exploit_db edb 2016-01-12 Exploit-DB ↗
39166 exploit_db edb 2016-01-05 Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2015-8660

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 58.35% 22.37% -35.98%
2 2026-05-21 59.96% 58.35% -1.60%
3 2026-04-01 — 59.96% —

Full EPSS history (20 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2015-8660

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.7 3.1 MEDIUM
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:L)
They already need access on the box, or another person has to do something wrong; it’s not a remote drive-by.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:H)
They need powerful rights—admin, root, or similar—before this pays off.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 0.8 5.9 [email protected]
7.2 2.0 HIGH
AV:L/AC:L/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 3.9 10.0 [email protected]

Weakness enumeration for CVE-2015-8660

OS Trackers for CVE-2015-8660

vendor priority summary link
debian not yet assigned CVE-2015-8660 not yet assigned priority: Debian including 1 source packages (linux), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2015-8660
redhat medium — https://access.redhat.com/security/cve/CVE-2015-8660
ubuntu high CVE-2015-8660 high priority: Ubuntu including 28 source packages (linux, linux-armadaxp, …), 187 status rows across 7 suites (precise, trusty, upstream, vivid, wily, xenial, yakkety): DNE 119, released 33, not-affected 24, ignored 11. https://ubuntu.com/security/CVE-2015-8660

Affected software / configurations for CVE-2015-8660

Vendor Product Version Raw CPE
linux linux_kernel >= 3.18, < 3.18.31 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 3.19, < 4.1.22 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux linux_kernel >= 4.2, < 4.4 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

References for CVE-2015-8660

URL Tags
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=acff81ec2c79492b180fade3c2894425cd35a545 Vendor Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00039.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00040.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00043.html Mailing List Third Party Advisory
http://packetstormsecurity.com/files/135151/Ubuntu-14.04-LTS-15.10-overlayfs-Local-Root.html Third Party Advisory VDB Entry
http://rhn.redhat.com/errata/RHSA-2016-1532.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-1539.html Third Party Advisory
http://rhn.redhat.com/errata/RHSA-2016-1541.html Third Party Advisory
http://www.openwall.com/lists/oss-security/2015/12/23/5 Mailing List Third Party Advisory
http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html Third Party Advisory
http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html Third Party Advisory
http://www.securityfocus.com/bid/79671 Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1034548 Third Party Advisory VDB Entry
http://www.ubuntu.com/usn/USN-2857-1 Third Party Advisory
http://www.ubuntu.com/usn/USN-2857-2 Third Party Advisory
http://www.ubuntu.com/usn/USN-2858-1 Third Party Advisory
http://www.ubuntu.com/usn/USN-2858-2 Third Party Advisory
http://www.ubuntu.com/usn/USN-2858-3 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1291329 Issue Tracking Third Party Advisory
https://github.com/torvalds/linux/commit/acff81ec2c79492b180fade3c2894425cd35a545 Vendor Advisory
https://www.exploit-db.com/exploits/39166/ Third Party Advisory VDB Entry
https://www.exploit-db.com/exploits/39230/ Third Party Advisory VDB Entry
https://www.exploit-db.com/exploits/40688/ Third Party Advisory VDB Entry
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