kernel: aufs module does not properly restrict the mount namespace
Published May 2, 2016
7.8
HIGHCVSS 3.1
EPSS 0.91%
Description
The aufs module for the Linux kernel 3.x and 4.x does not properly restrict the mount namespace, which allows local users to gain privileges by mounting an aufs filesystem on top of a FUSE filesystem, and then executing a crafted setuid program.
Affected products
No data.
- ≥ 3.0.0 · ≤ 3.19.8
- ≥ 4.0.0 · ≤ 4.20.15
No data.
Red Hat Enterprise Linux 5
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 7
kernel
Not affected
Red Hat Enterprise Linux 7
kernel-alt
Not affected
Red Hat Enterprise Linux 7
kernel-rt
Not affected
Red Hat Enterprise Linux 8
kernel
Not affected
Red Hat Enterprise Linux 8
kernel-rt
Not affected
Red Hat Enterprise MRG 2
kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 5 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel-alt | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise MRG 2 | kernel | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
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:M/Au:N/C:P/I:P/A:P
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 | 0.91% (0.00905) | 58.36th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.91% (0.00905) | 54.95th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.08% (0.00081) | 21.45th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00042) | 5.07th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00042) | 5.63th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.95% (0.00950) | 32.28th | v2 (v2022.01.01) |
| Sep 10, 2022 | 0.95% (0.00950) | 30.63th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.95% (0.00950) | 28.61th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.95% (0.00950) | 13.46th | v2 (v2022.01.01) |
References (9)
- http://www.halfdog.net/Security/2016/AufsPrivilegeEscalationInUserNamespaces/ x_refsource_MISCExploitThird Party Advisory
- http://www.openwall.com/lists/oss-security/2016/02/24/9 mailing-listx_refsource_MLISTExploitMailing ListThird Party Advisory
- http://www.openwall.com/lists/oss-security/2021/10/18/1 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.securityfocus.com/bid/96839 vdb-entryx_refsource_BIDBroken Link
- https://access.redhat.com/security/cve/CVE-2016-2853 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1871722 Issue Tracking
- https://nvd.nist.gov/vuln/detail/CVE-2016-2853
- https://sourceforge.net/p/aufs/mailman/message/34864744/ mailing-listx_refsource_MLISTThird Party Advisory
- https://www.cve.org/CVERecord?id=CVE-2016-2853
| Link | Providers | Tags |
|---|---|---|
| http://www.halfdog.net/Security/2016/AufsPrivilegeEscalationInUserNamespaces/ | x_refsource_MISCExploitThird Party Advisory | |
| http://www.openwall.com/lists/oss-security/2016/02/24/9 | mailing-listx_refsource_MLISTExploitMailing ListThird Party Advisory | |
| http://www.openwall.com/lists/oss-security/2021/10/18/1 | mailing-listx_refsource_MLISTMailing ListThird Party Advisory | |
| http://www.securityfocus.com/bid/96839 | vdb-entryx_refsource_BIDBroken Link | |
| https://access.redhat.com/security/cve/CVE-2016-2853 | Vendor Advisory | |
| https://bugzilla.redhat.com/show_bug.cgi?id=1871722 | Issue Tracking | |
| https://nvd.nist.gov/vuln/detail/CVE-2016-2853 | ||
| https://sourceforge.net/p/aufs/mailman/message/34864744/ | mailing-listx_refsource_MLISTThird Party Advisory | |
| https://www.cve.org/CVERecord?id=CVE-2016-2853 |
Change history (0)
No recorded changes yet.