The prepend_path function in fs/dcache.c in the Linux kernel before 4.2.4 does not…
Priority LOW 33Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Medium
- Impact type
- —
- Confidentiality · integrity · availability
- Complete · Complete · Complete
- Fix status
- Fixed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA and Red Hat.
Summary
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."
Why it matters now
EPSS 0.01197 68th percentileScored 2026-11-07
Fix Fixed Red Hat: 5 advisories
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | before 3.2.72; 3.3 to before 3.4.110; 3.5 to before 3.10.91; 3.11 to before 3.12.49; 3.13 to before 3.14.55; 3.15 to before 3.16.35; 3.17 to before 3.18.23; 3.19 to before 4.1.11; 4.2 to before 4.2.4 | Vulnerable | Linux |
| cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Debian |
| cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* | 8.0 | Vulnerable | Debian |
| cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:* | 12.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:* | 14.04 | Vulnerable | Canonical |
| cpe:2.3:o:canonical:ubuntu_linux:15.04:*:*:*:*:*:*:* | 15.04 | Vulnerable | Canonical |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions before 3.2.72; 3.3 to before 3.4.110; 3.5 to before 3.10.91; 3.11 to before 3.12.49; 3.13 to before 3.14.55; 3.15 to before 3.16.35; 3.17 to before 3.18.23; 3.19 to before 4.1.11; 4.2 to before 4.2.4 Vulnerable ·Linux
- cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Debian
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian
- cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:* Versions 12.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:* Versions 14.04 Vulnerable ·Canonical
- cpe:2.3:o:canonical:ubuntu_linux:15.04:*:*:*:*:*:*:* Versions 15.04 Vulnerable ·Canonical
Remediation
Red Hat 5 advisories
- RHSA-2016:0068 Released 2016-01-26 · Red Hat rating Importantkernel-rt security update
- Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt-1:3.10.0-327.rt56.170.el6rt, kernel-rt-debug-1:3.10.0-327.rt56.170.el6rt, kernel-rt-debug-devel-1:3.10.0-327.rt56.170.el6rt +7
- RHSA-2015:2636 Released 2015-12-15 · Red Hat rating Importantkernel security and bug fix update
- Red Hat Enterprise Linux Desktop (v. 6) kernel-2.6.32-573.12.1.el6, kernel-abi-whitelists-2.6.32-573.12.1.el6, kernel-debug-2.6.32-573.12.1.el6 +6
- Red Hat Enterprise Linux Desktop Optional (v. 6) python-perf-2.6.32-573.12.1.el6
- Red Hat Enterprise Linux HPC Node (v. 6) kernel-2.6.32-573.12.1.el6, kernel-abi-whitelists-2.6.32-573.12.1.el6, kernel-debug-2.6.32-573.12.1.el6 +6
- Red Hat Enterprise Linux HPC Node Optional (v. 6) python-perf-2.6.32-573.12.1.el6
- Red Hat Enterprise Linux Server (v. 6) kernel-2.6.32-573.12.1.el6, kernel-abi-whitelists-2.6.32-573.12.1.el6, kernel-bootwrapper-2.6.32-573.12.1.el6 +9
- Red Hat Enterprise Linux Server Optional (v. 6) python-perf-2.6.32-573.12.1.el6
- Red Hat Enterprise Linux Workstation (v. 6) kernel-2.6.32-573.12.1.el6, kernel-abi-whitelists-2.6.32-573.12.1.el6, kernel-debug-2.6.32-573.12.1.el6 +6
- Red Hat Enterprise Linux Workstation Optional (v. 6) python-perf-2.6.32-573.12.1.el6
- RHSA-2015:2587 Released 2015-12-09 · Red Hat rating Importantkernel security, bug fix, and enhancement update
- Red Hat Enterprise Linux ComputeNode EUS (v. 7.1) kernel-3.10.0-229.24.2.el7, kernel-abi-whitelists-3.10.0-229.24.2.el7, kernel-debug-3.10.0-229.24.2.el7 +7
- Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.1) kernel-tools-libs-devel-3.10.0-229.24.2.el7, python-perf-3.10.0-229.24.2.el7
- Red Hat Enterprise Linux Server EUS (v. 7.1) kernel-3.10.0-229.24.2.ael7b, kernel-3.10.0-229.24.2.el7, kernel-abi-whitelists-3.10.0-229.24.2.ael7b +20
- Red Hat Enterprise Linux Server Optional EUS (v. 7.1) kernel-debug-devel-3.10.0-229.24.2.ael7b, kernel-tools-libs-devel-3.10.0-229.24.2.ael7b, kernel-tools-libs-devel-3.10.0-229.24.2.el7 +2
Show 2 more Red Hat advisories
- RHSA-2015:2152 Released 2015-11-19 · Red Hat rating Importantkernel security, bug fix, and enhancement update
- Red Hat Enterprise Linux Client (v. 7) kernel-3.10.0-327.el7, kernel-abi-whitelists-3.10.0-327.el7, kernel-debug-3.10.0-327.el7 +8
- Red Hat Enterprise Linux Client Optional (v. 7) kernel-tools-libs-devel-3.10.0-327.el7
- Red Hat Enterprise Linux ComputeNode (v. 7) kernel-3.10.0-327.el7, kernel-abi-whitelists-3.10.0-327.el7, kernel-debug-3.10.0-327.el7 +8
- Red Hat Enterprise Linux ComputeNode Optional (v. 7) kernel-tools-libs-devel-3.10.0-327.el7
- Red Hat Enterprise Linux Server (v. 7) kernel-3.10.0-327.el7, kernel-abi-whitelists-3.10.0-327.el7, kernel-bootwrapper-3.10.0-327.el7 +11
- Red Hat Enterprise Linux Server Optional (v. 7) kernel-debug-devel-3.10.0-327.el7, kernel-tools-libs-devel-3.10.0-327.el7
- Red Hat Enterprise Linux Workstation (v. 7) kernel-3.10.0-327.el7, kernel-abi-whitelists-3.10.0-327.el7, kernel-debug-3.10.0-327.el7 +8
- Red Hat Enterprise Linux Workstation Optional (v. 7) kernel-tools-libs-devel-3.10.0-327.el7
- RHSA-2015:2411 Released 2015-11-19 · Red Hat rating Importantkernel-rt security, bug fix, and enhancement update
- Red Hat Enterprise Linux for Real Time (v. 7) kernel-rt-3.10.0-327.rt56.204.el7, kernel-rt-debug-3.10.0-327.rt56.204.el7, kernel-rt-debug-devel-3.10.0-327.rt56.204.el7 +4
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux Client (v. 7) | Fixed | RHSA-2015:2152 |
| Red Hat Enterprise Linux Client Optional (v. 7) | Fixed | RHSA-2015:2152 |
| Red Hat Enterprise Linux ComputeNode (v. 7) | Fixed | RHSA-2015:2152 |
| Red Hat Enterprise Linux ComputeNode EUS (v. 7.1) | Fixed | RHSA-2015:2587 |
| Red Hat Enterprise Linux ComputeNode Optional (v. 7) | Fixed | RHSA-2015:2152 |
| Red Hat Enterprise Linux ComputeNode Optional EUS (v. 7.1) | Fixed | RHSA-2015:2587 |
| Red Hat Enterprise Linux Desktop (v. 6) | Fixed | RHSA-2015:2636 |
| Red Hat Enterprise Linux Desktop Optional (v. 6) | Fixed | RHSA-2015:2636 |
| Red Hat Enterprise Linux HPC Node (v. 6) | Fixed | RHSA-2015:2636 |
| Red Hat Enterprise Linux HPC Node Optional (v. 6) | Fixed | RHSA-2015:2636 |
| Red Hat Enterprise Linux Server (v. 6) | Fixed | RHSA-2015:2636 |
| Red Hat Enterprise Linux Server (v. 7) | Fixed | RHSA-2015:2152 |
| Red Hat Enterprise Linux Server EUS (v. 7.1) | Fixed | RHSA-2015:2587 |
| Red Hat Enterprise Linux Server Optional (v. 6) | Fixed | RHSA-2015:2636 |
| Red Hat Enterprise Linux Server Optional (v. 7) | Fixed | RHSA-2015:2152 |
| Red Hat Enterprise Linux Server Optional EUS (v. 7.1) | Fixed | RHSA-2015:2587 |
| Red Hat Enterprise Linux Workstation (v. 6) | Fixed | RHSA-2015:2636 |
| Red Hat Enterprise Linux Workstation (v. 7) | Fixed | RHSA-2015:2152 |
| Red Hat Enterprise Linux Workstation Optional (v. 6) | Fixed | RHSA-2015:2636 |
| Red Hat Enterprise Linux Workstation Optional (v. 7) | Fixed | RHSA-2015:2152 |
| Red Hat Enterprise Linux for Real Time (v. 7) | Fixed | RHSA-2015:2411 |
| Red Hat MRG Realtime for RHEL 6 Server v.2 | Fixed | RHSA-2016:0068 |
Not affected: 1 product
- Red Hat Enterprise Linux 5
Timeline
- 2026-10-02 Threatist record created from CVE-2015-2925
- 2026-10-03 Alias added: GHSA-v42c-fv3v-4g2f
References
Advisory 31
- SUSE-SU-2015:2292
- RHSA-2015:2636
- DSA-3372
- RHSA-2016:0068
- http://pkgs.fedoraproject.org/cgit/kernel.git/commit/?h=f22&id=520b64102de2f184036024b2a53de2b67463bd78
- SUSE-SU-2016:0337
- USN-2792-1
- SUSE-SU-2016:0434
- DSA-3364
- USN-2794-1
- USN-2799-1
- USN-2795-1
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
- SUSE-SU-2015:2194
- SUSE-SU-2016:0380
- SUSE-SU-2016:0335
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
- SUSE-SU-2016:0383
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=cde93be45a8a90d8c264c776fab63487b5038a65
- SUSE-SU-2016:0386
- [oss-security] 20150404 Re: Linux namespaces: It is possible to escape from bind mounts
- 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
- 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
- SUSE-SU-2016:0381
- USN-2798-1
Sources
- CVE-2015-2925 · CVE Program
- CVE-2015-2925 · NVD
- FIRST EPSS
- GHSA-v42c-fv3v-4g2f · GitHub Advisory Database · CC BY 4.0
- CVE-2015-2925 · Red Hat security data · CC BY 4.0
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