The overlayfs implementation in the Linux kernel through 4.5.2 does not properly maintain POSIX ACL xattr data, which allows local users to gain privileges by leveraging a group-writable setgid directory
Published May 2, 2016
7.8
HIGHCVSS 3.1
EPSS 0.92%
Description
The overlayfs implementation in the Linux kernel through 4.5.2 does not properly maintain POSIX ACL xattr data, which allows local users to gain privileges by leveraging a group-writable setgid directory.
Affected products
No data.
Configuration 1
- ≤ 4.5.2
Configuration 2
- 15.04
- 12.04
- 14.04
- 15.10
- 16.04
- 16.10
- 15.04
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
Red Hat statement
Not vulnerable. This issue does not affect the versions of the kernel package as shipped with Red Hat Enterprise Linux 5, 6, 7 and Red Hat Enterprise MRG 2.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:L/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 1, 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 (9 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.92% (0.00923) | 58.96th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.92% (0.00923) | 55.55th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.55% (0.00548) | 65.93th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00044) | 15.06th | v3 (v2023.03.01) |
| May 27, 2024 | 0.04% (0.00044) | 12.76th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00044) | 10.75th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.11% (0.02115) | 80.01th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.11% (0.02115) | 78.09th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.11% (0.02115) | 56.78th | v2 (v2022.01.01) |
References (9)
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e9f57ebcba563e0cd532926cab83c92bb4d79360 x_refsource_MISCPatchVendor Advisory
- http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-1575.html x_refsource_CONFIRMThird Party Advisory
- http://www.halfdog.net/Security/2016/UserNamespaceOverlayfsXattrSetgidPrivilegeEscalation/ x_refsource_MISCExploitThird Party Advisory
- http://www.openwall.com/lists/oss-security/2016/02/24/7 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2021/10/18/1 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2016-1575 Vendor Advisory
- https://launchpad.net/bugs/1534961 x_refsource_CONFIRMThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2016-1575
- https://www.cve.org/CVERecord?id=CVE-2016-1575
| Link | Providers | Tags |
|---|---|---|
| http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e9f57ebcba563e0cd532926cab83c92bb4d79360 | x_refsource_MISCPatchVendor Advisory | |
| http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-1575.html | x_refsource_CONFIRMThird Party Advisory | |
| http://www.halfdog.net/Security/2016/UserNamespaceOverlayfsXattrSetgidPrivilegeEscalation/ | x_refsource_MISCExploitThird Party Advisory | |
| http://www.openwall.com/lists/oss-security/2016/02/24/7 | mailing-listx_refsource_MLISTMailing ListThird Party Advisory | |
| http://www.openwall.com/lists/oss-security/2021/10/18/1 | mailing-listx_refsource_MLISTMailing ListThird Party Advisory | |
| https://access.redhat.com/security/cve/CVE-2016-1575 | Vendor Advisory | |
| https://launchpad.net/bugs/1534961 | x_refsource_CONFIRMThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2016-1575 | ||
| https://www.cve.org/CVERecord?id=CVE-2016-1575 |
Change history (0)
No recorded changes yet.