kernel: Permission bypass on overlayfs during copy_up
Published Dec 28, 2015
6.7
MEDIUMCVSS 3.1
EPSS 22.20%
Description
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.
Affected products
No data.
- ≥ 3.18 · < 3.18.31
- ≥ 3.19 · < 4.1.22
- ≥ 4.2 · < 4.4
No data.
Red Hat Enterprise Linux 7
kernel-0:3.10.0-327.28.2.el7
Fixed · RHSA-2016:1539
Red Hat Enterprise Linux 7
kernel-rt-0:3.10.0-327.28.2.rt56.234.el7_2
Fixed · RHSA-2016:1541
Red Hat Enterprise MRG 2
kernel-rt-1:3.10.0-327.rt56.194.el6rt
Fixed · RHSA-2016:1532
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 7 | kernel-0:3.10.0-327.28.2.el7 | Fixed | RHSA-2016:1539 |
| Red Hat Enterprise Linux 7 | kernel-rt-0:3.10.0-327.28.2.rt56.234.el7_2 | Fixed | RHSA-2016:1541 |
| Red Hat Enterprise MRG 2 | kernel-rt-1:3.10.0-327.rt56.194.el6rt | Fixed | RHSA-2016:1532 |
| Red Hat Enterprise Linux 5 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 5, 6 as the code with the flaw is not present in the products listed. This issue does not affect the Linux kernel packages as shipped with Red Hat Enterprise Linux 7 and Red Hat Enterprise MRG 2 as the due updates to fix this issue have been shipped now.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
AV:L/AC:L/Au:N/C:C/I:C/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (24 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 22.20% (0.22204) | 97.61th | v5 (v2026.06.15) |
| Jun 15, 2026 | 22.37% (0.22374) | 97.39th | v5 (v2026.06.15) |
| May 21, 2026 | 58.35% (0.58352) | 98.22th | v4 (v2025.03.14) |
| Apr 1, 2026 | 59.96% (0.59956) | 98.25th | v4 (v2025.03.14) |
| Feb 18, 2026 | 63.46% (0.63462) | 98.36th | v4 (v2025.03.14) |
| Jul 20, 2025 | 65.43% (0.65431) | 98.38th | v4 (v2025.03.14) |
| Jul 2, 2025 | 62.06% (0.62057) | 98.25th | v4 (v2025.03.14) |
| Jun 8, 2025 | 65.92% (0.65916) | 98.38th | v4 (v2025.03.14) |
| Apr 7, 2025 | 68.14% (0.68136) | 98.49th | v4 (v2025.03.14) |
| Mar 31, 2025 | 69.50% (0.69503) | 98.54th | v4 (v2025.03.14) |
| Mar 30, 2025 | 61.55% (0.61551) | 98.17th | v4 (v2025.03.14) |
| Mar 29, 2025 | 57.36% (0.57358) | 97.33th | v4 (v2025.03.14) |
| Mar 28, 2025 | 61.55% (0.61551) | 98.17th | v4 (v2025.03.14) |
| Mar 27, 2025 | 57.36% (0.57358) | 97.85th | v4 (v2025.03.14) |
| Mar 20, 2025 | 61.55% (0.61551) | 98.20th | v4 (v2025.03.14) |
| Mar 19, 2025 | 57.36% (0.57358) | 97.89th | v4 (v2025.03.14) |
| Mar 17, 2025 | 61.55% (0.61551) | 98.15th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.11% (0.00115) | 46.91th | v3 (v2023.03.01) |
| Jun 8, 2023 | 0.11% (0.00115) | 44.17th | v3 (v2023.03.01) |
| Mar 30, 2023 | 0.04% (0.00043) | 7.89th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.06% (0.00056) | 21.18th | v3 (v2023.03.01) |
| Mar 6, 2023 | 3.82% (0.03821) | 85.56th | v2 (v2022.01.01) |
| Apr 1, 2022 | 3.82% (0.03821) | 84.08th | v2 (v2022.01.01) |
| Feb 4, 2022 | 3.82% (0.03821) | 67.27th | v2 (v2022.01.01) |
References (26)
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=acff81ec2c79492b180fade3c2894425cd35a545 x_refsource_CONFIRMVendor Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00039.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00040.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00043.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://packetstormsecurity.com/files/135151/Ubuntu-14.04-LTS-15.10-overlayfs-Local-Root.html x_refsource_MISCThird Party AdvisoryVDB Entry
- http://rhn.redhat.com/errata/RHSA-2016-1532.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2016-1539.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2016-1541.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://www.openwall.com/lists/oss-security/2015/12/23/5 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html x_refsource_CONFIRMThird Party Advisory
- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html x_refsource_CONFIRMThird Party Advisory
- http://www.securityfocus.com/bid/79671 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1034548 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- http://www.ubuntu.com/usn/USN-2857-1 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- http://www.ubuntu.com/usn/USN-2857-2 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- http://www.ubuntu.com/usn/USN-2858-1 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- http://www.ubuntu.com/usn/USN-2858-2 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- http://www.ubuntu.com/usn/USN-2858-3 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2015-8660 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1291329 x_refsource_CONFIRMIssue TrackingThird Party Advisory
- https://github.com/torvalds/linux/commit/acff81ec2c79492b180fade3c2894425cd35a545 x_refsource_CONFIRMVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2015-8660
- https://www.cve.org/CVERecord?id=CVE-2015-8660
- https://www.exploit-db.com/exploits/39166/ exploitx_refsource_EXPLOIT-DBThird Party AdvisoryVDB Entry
- https://www.exploit-db.com/exploits/39230/ exploitx_refsource_EXPLOIT-DBThird Party AdvisoryVDB Entry
- https://www.exploit-db.com/exploits/40688/ exploitx_refsource_EXPLOIT-DBThird Party AdvisoryVDB Entry
Change history (0)
No recorded changes yet.