Kernel: vfs: Do not allow escaping from bind mounts
Published Nov 16, 2015
6.9
MEDIUMCVSS 2.0
EPSS 1.25%
Description
The prepend_path function in fs/dcache.c in the Linux kernel before 4.2.4 does not properly handle rename actions inside a bind mount, which allows local users to bypass an intended container protection mechanism by renaming a directory, related to a "double-chroot attack."
Affected products
No data.
Configuration 1
- < 3.2.72
- ≥ 3.3 · < 3.4.110
- ≥ 3.5 · < 3.10.91
- ≥ 3.11 · < 3.12.49
- ≥ 3.13 · < 3.14.55
- ≥ 3.15 · < 3.16.35
- ≥ 3.17 · < 3.18.23
- ≥ 3.19 · < 4.1.11
- ≥ 4.2 · < 4.2.4
Configuration 2
- 7.0
- 8.0
Configuration 3
- 12.04
- 14.04
- 15.04
No data.
Red Hat Enterprise Linux 6
kernel-0:2.6.32-573.12.1.el6
Fixed · RHSA-2015:2636
Red Hat Enterprise Linux 7
kernel-0:3.10.0-327.el7
Fixed · RHSA-2015:2152
Red Hat Enterprise Linux 7
kernel-rt-0:3.10.0-327.rt56.204.el7
Fixed · RHSA-2015:2411
Red Hat Enterprise Linux 7.1 Extended Update Support
kernel-0:3.10.0-229.24.2.ael7b
Fixed · RHSA-2015:2587
Red Hat Enterprise MRG 2
kernel-rt-1:3.10.0-327.rt56.170.el6rt
Fixed · RHSA-2016:0068
Red Hat Enterprise Linux 5
kernel
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 6 | kernel-0:2.6.32-573.12.1.el6 | Fixed | RHSA-2015:2636 |
| Red Hat Enterprise Linux 7 | kernel-0:3.10.0-327.el7 | Fixed | RHSA-2015:2152 |
| Red Hat Enterprise Linux 7 | kernel-rt-0:3.10.0-327.rt56.204.el7 | Fixed | RHSA-2015:2411 |
| Red Hat Enterprise Linux 7.1 Extended Update Support | kernel-0:3.10.0-229.24.2.ael7b | Fixed | RHSA-2015:2587 |
| Red Hat Enterprise MRG 2 | kernel-rt-1:3.10.0-327.rt56.170.el6rt | Fixed | RHSA-2016:0068 |
| Red Hat Enterprise Linux 5 | kernel | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
This issue does not affect the version of the kernel package as shipped with Red Hat Enterprise Linux 5. This issue affects the versions of Linux kernel as shipped with Red Hat Enterprise Linux 6 and 7 and Red Hat Enterprise MRG 2. Future kernel updates for the respective releases may address this issue.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:L/AC:M/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 2, 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 2, 2026 | 1.25% (0.01246) | 68.24th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.25% (0.01246) | 65.32th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.75% (0.00747) | 71.36th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.04% (0.00044) | 11.89th | v3 (v2023.03.01) |
| Jul 2, 2024 | 0.04% (0.00044) | 10.25th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.04% (0.00044) | 8.24th | v3 (v2023.03.01) |
| Mar 6, 2023 | 6.67% (0.06674) | 91.55th | v2 (v2022.01.01) |
| Apr 1, 2022 | 6.67% (0.06674) | 90.73th | v2 (v2022.01.01) |
| Feb 4, 2022 | 6.67% (0.06674) | 78.72th | v2 (v2022.01.01) |
References (37)
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=397d425dc26da728396e66d392d5dcb8dac30c37 x_refsource_CONFIRMThird Party Advisory
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cde93be45a8a90d8c264c776fab63487b5038a65 x_refsource_CONFIRMThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00005.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2015-12/msg00018.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00007.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00009.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00017.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00018.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00019.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00020.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
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- http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00034.html vendor-advisoryx_refsource_SUSEMailing ListThird Party Advisory
- http://permalink.gmane.org/gmane.linux.kernel.containers/29173 mailing-listx_refsource_MLISTBroken Link
- http://permalink.gmane.org/gmane.linux.kernel.containers/29177 mailing-listx_refsource_MLISTBroken Link
- http://pkgs.fedoraproject.org/cgit/kernel.git/commit/?h=f22&id=520b64102de2f184036024b2a53de2b67463bd78 x_refsource_CONFIRMThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2015-2636.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://rhn.redhat.com/errata/RHSA-2016-0068.html vendor-advisoryx_refsource_REDHATThird Party Advisory
- http://www.debian.org/security/2015/dsa-3364 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- http://www.debian.org/security/2015/dsa-3372 vendor-advisoryx_refsource_DEBIANThird Party Advisory
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.2.4 x_refsource_CONFIRMVendor Advisory
- http://www.openwall.com/lists/oss-security/2015/04/04/4 mailing-listx_refsource_MLISTMailing ListThird Party Advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html x_refsource_CONFIRMThird Party Advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html x_refsource_CONFIRMThird Party Advisory
- http://www.securityfocus.com/bid/73926 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.ubuntu.com/usn/USN-2792-1 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- http://www.ubuntu.com/usn/USN-2794-1 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- http://www.ubuntu.com/usn/USN-2795-1 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- http://www.ubuntu.com/usn/USN-2798-1 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- http://www.ubuntu.com/usn/USN-2799-1 vendor-advisoryx_refsource_UBUNTUThird Party Advisory
- https://access.redhat.com/security/cve/CVE-2015-2925 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1209367 x_refsource_CONFIRMIssue TrackingThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1209373 x_refsource_CONFIRMIssue TrackingThird Party Advisory
- https://github.com/torvalds/linux/commit/397d425dc26da728396e66d392d5dcb8dac30c37 x_refsource_CONFIRMThird Party Advisory
- https://github.com/torvalds/linux/commit/cde93be45a8a90d8c264c776fab63487b5038a65 x_refsource_CONFIRMThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2015-2925
- https://www.cve.org/CVERecord?id=CVE-2015-2925
Change history (0)
No recorded changes yet.