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CVE-2015-8660

48
FAUCET Score

CVE-2015-8660 describes a local privilege escalation vulnerability in the Linux kernel's overlayfs filesystem, affecting versions up to 4.3.3. An attacker with high privileges can bypass access restrictions and modify arbitrary overlay file attributes due to improper handling of setattr operations. This vulnerability has a CVSS score of 6.7 (Medium) with high impact on confidentiality, integrity, and availability, and a high FAUCET Risk Score of 99/100. While not listed on the KEV catalog, multiple public exploits, including Metasploit modules and ExploitDB entries, demonstrate its exploitability. Despite the availability of exploit code, there is minimal community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
>= 3.18, < 3.18.31CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 3.19, < 4.1.22CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 4.2, < 4.4CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.7MEDIUM

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
0.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
22.37%
Probability of exploitation in next 30 days
EPSS Percentile
97.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Metasploit: Overlayfs Privilege Escalation · Jun 16, 2015
ExploitDB: EDB-40688 · Nov 2, 2016
This CVE's current EPSS score of 0.2237 is in the 100th percentile among its peer group of 3,720 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-rt-0:3.10.0-327.28.2.rt56.234.el7_2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-0:3.10.0-327.28.2.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise MRG 2Fixed in: kernel-rt-1:3.10.0-327.rt56.194.el6rt
View patch
github_advisoryvendor investigatingvia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2015-8660Moderate

kernel: Permission bypass on overlayfs during copy_up

Dec 4, 2015

References

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