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Fencer Vulns
medium 5.5

CVE-2017-14340 json

The XFS_IS_REALTIME_INODE macro in fs/xfs/xfs_linux.h in the Linux kernel before 4.13.2 does not verify that a filesystem has a realtime de…

published 2017-09-15 9 y ago modified 2026-06-17 4 mo ago also EUVD-2017-5843

cvss
5.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 36%
public exploits
0
none known

Summary

The XFS_IS_REALTIME_INODE macro in fs/xfs/xfs_linux.h in the Linux kernel before 4.13.2 does not verify that a filesystem has a realtime device, which allows local users to cause a denial of service (NULL pointer dereference and OOPS) via vectors related to setting an RHINHERIT flag on a directory.

Patch / fix

  • linux Debian 14, Debian 13, Debian 12 4.12.13-1

debian advisories DEBIAN-CVE-2017-14340

  • linux Ubuntu 14.04 LTS 3.13.0-135.184
  • linux Ubuntu 16.04 LTS 4.4.0-98.121
  • linux-aws Ubuntu 16.04 LTS 4.4.0-1039.48
  • linux-gcp Ubuntu 16.04 LTS 4.10.0-1008.8
  • linux-gke Ubuntu 16.04 LTS 4.4.0-1033.33
  • linux-hwe Ubuntu 16.04 LTS 4.13.0-32.35~16.04.1
  • linux-kvm Ubuntu 16.04 LTS 4.4.0-1009.14
  • linux-azure Ubuntu 16.04 LTS 4.13.0-1005.7

ubuntu advisories UBUNTU-CVE-2017-14340

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel-rt enterprise mrg 2 1:3.10.0-693.5.2.rt56.592.el6rt
  • kernel-rt-trace enterprise mrg 2 1:3.10.0-693.5.2.rt56.592.el6rt
  • kernel-rt-vanilla enterprise mrg 2 1:3.10.0-693.5.2.rt56.592.el6rt
  • kernel-rt-firmware enterprise mrg 2 1:3.10.0-693.5.2.rt56.592.el6rt
  • kernel-rt-debuginfo-common-x86_64 enterprise mrg 2 1:3.10.0-693.5.2.rt56.592.el6rt

red hat advisories RHSA-2017:2918

  • kernel-ec2 SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3 3.0.101-0.47.106.11.1
  • kernel-pae SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3 3.0.101-0.47.106.11.1
  • kernel-xen SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3 3.0.101-0.47.106.11.1
  • kernel-syms SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3 3.0.101-0.47.106.11.1
  • kernel-trace SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3 3.0.101-0.47.106.11.1
  • kernel-source SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3 3.0.101-0.47.106.11.1
  • kernel-default SLES 11 SP3-LTSS, SLE Point of Sale 11 SP3 3.0.101-0.47.106.11.1
  • kernel-ec2 SLES for SAP 11 SP4, SLES 11 SP4 3.0.101-108.18.1

suse advisories SUSE-SU-2018:0040-1SUSE-SU-2017:3265-1SUSE-SU-2017:2694-1

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-2017-14340 updated cvss 5.5

kernel: xfs: unprivileged user kernel oops

  • Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt 3.10.0-693.5.2.rt56.592.el6rt, kernel-rt-trace 3.10.0-693.5.2.rt56.592.el6rt, kernel-rt-vanilla 3.10.0-693.5.2.rt56.592.el6rt, kernel-rt-firmware 3.10.0-693.5.2.rt56.592.el6rt, kernel-rt-debuginfo-common-x86_64 3.10.0-693.5.2.rt56.592.el6rt
    fixed: vendor fix RHSA-2017:2918
  • 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

0.42% chance of exploitation in the next 30 days, higher than 36% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
NVD 3.0 5.5 CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 4.9 AV:L/AC:L/Au:N/C:N/I:N/A:C

Classification

Weakness
Technology feeds

References

Sources

Fencer Vulns 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.