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Fencer Intel
low 2.1

CVE-2014-9731 json

The UDF filesystem implementation in the Linux kernel before 3.18.2 does not ensure that space is available for storing a symlink target's…

published 2015-08-31 11 y ago modified 2026-06-17 4 mo ago also EUVD-2014-9537

cvss
2.1
version 2.0, 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 UDF filesystem implementation in the Linux kernel before 3.18.2 does not ensure that space is available for storing a symlink target's name along with a trailing \0 character, which allows local users to obtain sensitive information via a crafted filesystem image, related to fs/udf/symlink.c and fs/udf/unicode.c.

Patch / fix

  • linux Debian 14, Debian 13, Debian 12 3.16.7-ckt4-1

debian advisories DEBIAN-CVE-2014-9731

  • linux Ubuntu 14.04 LTS 3.13.0-48.80
  • linux-lts-utopic Ubuntu 14.04 LTS 3.16.0-31.41~14.04.1

ubuntu advisories UBUNTU-CVE-2014-9731

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 SLE Real Time 11 SP3 3.0.101.rt130-0.33.40.1
  • kernel-syms-rt SLE Real Time 11 SP3 3.0.101.rt130-0.33.40.1
  • kernel-rt_trace SLE Real Time 11 SP3 3.0.101.rt130-0.33.40.1
  • kernel-source-rt SLE Real Time 11 SP3 3.0.101.rt130-0.33.40.1
  • kernel-source SLES for SAP 11 SP4, SLES 11 SP4, SLED 11 SP4 3.0.101-65.1
  • kernel-ec2 SLES for SAP 11 SP4, SLES 11 SP4 3.0.101-65.1
  • kernel-pae SLES for SAP 11 SP4, SLES 11 SP4, SLED 11 SP4 3.0.101-65.1
  • kernel-xen SLES for SAP 11 SP4, SLES 11 SP4, SLED 11 SP4 3.0.101-65.1

suse advisories SUSE-SU-2015:1592-1SUSE-SU-2015:1678-1SUSE-SU-2015:1611-1SUSE-SU-2015:1224-1SUSE-SU-2015:1324-1

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-2014-9731 updated cvss 1.9

Kernel: fs: udf: information leakage when reading symlink

  • 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 Red Hat Enterprise MRG 2 kernel-rt, mrg-rt-release, kernel-rt-trace, kernel-rt-vanilla, kernel-rt-firmware
    affected: workaround, no fix planned “The UDF filesystem is enabled via loading the UDF kernel module. The kernel module can be prevented from loading via blacklisting see https://access.redhat.com/solutions/41278 for more information.”

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, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 2.1 AV:L/AC:L/Au:N/C:P/I:N/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.