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Fencer Intel
medium 6.1

CVE-2014-9717 json

fs/namespace.c in the Linux kernel before 4.0.2 processes MNT_DETACH umount2 system calls without verifying that the MNT_LOCKED flag is uns…

published 2016-05-02 10 y ago modified 2026-06-17 4 mo ago also EUVD-2014-9524

cvss
6.1
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 26%
public exploits
0
none known

Summary

fs/namespace.c in the Linux kernel before 4.0.2 processes MNT_DETACH umount2 system calls without verifying that the MNT_LOCKED flag is unset, which allows local users to bypass intended access restrictions and navigate to filesystem locations beneath a mount by calling umount2 within a user namespace.

Patch / fix

  • linux Debian 14, Debian 13, Debian 12 4.0.2-1

debian advisories DEBIAN-CVE-2014-9717

  • kernel-rt SLE Real Time 12 SP1 3.12.61-60.18.1
  • kernel-compute SLE Real Time 12 SP1 3.12.61-60.18.1
  • kernel-syms-rt SLE Real Time 12 SP1 3.12.61-60.18.1
  • kernel-rt_debug SLE Real Time 12 SP1 3.12.61-60.18.1
  • kernel-source-rt SLE Real Time 12 SP1 3.12.61-60.18.1
  • kernel-compute_debug SLE Real Time 12 SP1 3.12.61-60.18.1
  • kernel-ec2 SLE Module for Public Cloud 12 3.12.59-60.41.2
  • kernel-xen SLES for SAP 12 SP1, SLES 12 SP1, SLED 12 SP1 3.12.59-60.41.2

suse advisories SUSE-SU-2016:1937-1SUSE-SU-2016:1696-1SUSE-SU-2016:1690-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2014-9717 updated cvss 2.6

kernel: unsharing MNT_LOCKED mount can expose files beneath the mount.

  • Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.33% chance of exploitation in the next 30 days, higher than 26% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.0 6.1 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
NVD 2.0 3.6 AV:L/AC:L/Au:N/C:P/I:P/A:N

Classification

Weakness
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.