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."
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | linux | 4.2.1-1 | — |
| Debian 13 | linux | 4.2.1-1 | — |
| Debian 12 | linux | 4.2.1-1 | — |
| Debian 6.0 | linux-2.6 | 2.6.32-48squeeze16 | DLA-325-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | linux-riscv +6 | No fix yet | — |
| Ubuntu 22.04 LTS | linux-riscv +2 | No fix yet | — |
| Ubuntu 20.04 LTS | linux-gke +4 | No fix yet | — |
| Ubuntu 18.04 LTS | linux-gcp +3 | No fix yet | — |
| Ubuntu 14.04 LTS | linux | 3.13.0-67.110 | USN-2794-1 |
| Ubuntu 14.04 LTS | linux-lts-utopic | 3.16.0-52.71~14.04.1 | USN-2797-1 |
| Ubuntu 14.04 LTS | linux-lts-vivid | 3.19.0-32.37~14.04.1 | USN-2798-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | linux-azure-fde-5.15 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | kernel-rt +7 | 3.10.0-327.rt56.204.el7 | RHSA-2015:2411 |
| RHEL 7 | perf +18 | 3.10.0-327.el7 | RHSA-2015:2152 |
| RHEL 6 | perf +16 | 2.6.32-573.12.1.el6 | RHSA-2015:2636 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7.1 EUS | kernel-kdump +4 | 3.10.0-229.24.2.el7 | RHSA-2015:2587 |
| RHEL 7.1 EUS | perf +13 | 3.10.0-229.24.2.ael7b | RHSA-2015:2587 |
| Red Hat MRG 2 | kernel-rt +10 | 1:3.10.0-327.rt56.170.el6rt | RHSA-2016:0068 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 12 SP1 | kernel-obs-build | 3.12.51-60.20.1 | SUSE-SU-2015:2292-1 |
| SLES 12 SP1 | kernel-xen +4 | 3.12.51-60.20.2 | SUSE-SU-2015:2292-1 |
| SLES 12 | kernel-docs | 3.12.51-52.31.5 | SUSE-SU-2015:2194-1 |
| SLES 12 | kernel-ec2 +5 | 3.12.51-52.31.1 | SUSE-SU-2015:2292-1, SUSE-SU-2015:2194-1 |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP1 | kernel-xen +3 | 3.12.51-60.20.2 | SUSE-SU-2015:2292-1 |
| SLES for SAP 12 | kernel-xen +3 | 3.12.51-52.31.1 | SUSE-SU-2015:2194-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP1_Update_0 | 2-5.1 | SUSE-SU-2016:0335-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12-SP1_Update_1 | 1-4.1 | SUSE-SU-2015:2292-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12_Update_1 +1 | 5-2.1 | SUSE-SU-2016:0434-1, SUSE-SU-2016:0384-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12_Update_3 +2 | 4-2.1 | SUSE-SU-2016:0383-1, SUSE-SU-2016:0381-1, SUSE-SU-2016:0380-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12_Update_6 +1 | 3-2.1 | SUSE-SU-2016:0387-1, SUSE-SU-2016:0386-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12_Update_8 | 2-2.1 | SUSE-SU-2016:0337-1 |
| SLE Live Patching 12 | kgraft-patch-SLE12_Update_9 | 1-2.2 | SUSE-SU-2015:2194-1 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | dtrace-modules-3.8.13-118.2.4.el6uek | 0.4.5-3.el6 | ELSA-2016-3501 |
| Oracle Linux 7 | dtrace-modules-3.8.13-118.2.4.el7uek | 0.4.5-3.el7 | ELSA-2016-3501 |
| Oracle Linux 7 | kernel-uek +5 | 3.8.13-118.2.4.el7uek | ELSA-2016-3501 |
| Oracle Linux 7 | perf +11 | 3.10.0-327.el7 | ELSA-2015-2152 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
GitHub 1 repository
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Kagami/docker_cve-2015-2925 ★ 11 · Jun 30, 2015
Docker + CVE-2015-2925 = escaping from --volume
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 22
- RHSA-2016:0068 Red Hat Security Advisory: kernel-rt security update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2015:2636 Red Hat Security Advisory: kernel security and bug fix update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2015:2587 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2015:2411 Red Hat Security Advisory: kernel-rt security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- RHSA-2015:2152 Red Hat Security Advisory: kernel security, bug fix, and enhancement update Red Hat Security Advisories (RHSA) · Jun 29, 2026
- USN-2794-1 linux vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
- DLA-325-1 linux-2.6 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-2797-1 linux-lts-utopic vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- USN-2798-1 linux-lts-vivid vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026
- SUSE-SU-2015:2194-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:0384-1 Security update for kernel live patch 2 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:0335-1 Security update for kernel live patch SP1 0 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:0383-1 Security update for kernel live patch 5 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:0387-1 Security update for kernel live patch 7 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:0434-1 Security update for kernel live patch 1 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:0386-1 Security update for kernel live patch 6 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:0337-1 Security update for kernel live patch 8 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:0381-1 Security update for kernel live patch 4 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2016:0380-1 Security update for kernel live patch 3 SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2015:2292-1 Security update for the Linux Kernel SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2016-3501 Important: Unbreakable Enterprise kernel security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jan 8, 2016
- ELSA-2015-2152 Important: kernel security, bug fix, and enhancement update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Nov 24, 2015
References
- SUSE-SU-2015:2292 vendor-advisory
- RHSA-2015:2636 vendor-advisory
- DSA-3372 vendor-advisory
- [containers] 20150403 [PATCH review 17/19] vfs: Test for and handle paths that are unreachable from their mnt_root mailing-list
- RHSA-2016:0068 vendor-advisory
- http://pkgs.fedoraproject.org/cgit/kernel.git/commit/?h=f22&id=520b64102de2f184036024b2a53de2b67463bd78
- SUSE-SU-2016:0337 vendor-advisory
- USN-2792-1 vendor-advisory
- 73926 vdb-entry
- SUSE-SU-2016:0434 vendor-advisory
- DSA-3364 vendor-advisory
- USN-2794-1 vendor-advisory
- USN-2799-1 vendor-advisory
- USN-2795-1 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
- SUSE-SU-2015:2194 vendor-advisory
- SUSE-SU-2016:0380 vendor-advisory
- SUSE-SU-2016:0335 vendor-advisory
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
- [containers] 20150403 [PATCH review 19/19] vfs: Do not allow escaping from bind mounts. mailing-list
- SUSE-SU-2016:0383 vendor-advisory
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cde93be45a8a90d8c264c776fab63487b5038a65
- SUSE-SU-2016:0386 vendor-advisory
- [oss-security] 20150404 Re: Linux namespaces: It is possible to escape from bind mounts mailing-list
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.2.4
- https://bugzilla.redhat.com/show_bug.cgi?id=1209367
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=397d425dc26da728396e66d392d5dcb8dac30c37
- SUSE-SU-2016:0384 vendor-advisory
- https://github.com/torvalds/linux/commit/cde93be45a8a90d8c264c776fab63487b5038a65
- https://bugzilla.redhat.com/show_bug.cgi?id=1209373
- https://github.com/torvalds/linux/commit/397d425dc26da728396e66d392d5dcb8dac30c37
- SUSE-SU-2016:0387 vendor-advisory
- SUSE-SU-2016:0381 vendor-advisory
- USN-2798-1 vendor-advisory