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Fencer Intel
low 1.9

CVE-2012-6548 json

The udf_encode_fh function in fs/udf/namei.c in the Linux kernel before 3.6 does not initialize a certain structure member, which allows lo…

published 2013-03-14 13 y ago modified 2026-06-16 4 mo ago also EUVD-2012-6396

cvss
1.9
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 37%
public exploits
0
none known

Summary

The udf_encode_fh function in fs/udf/namei.c in the Linux kernel before 3.6 does not initialize a certain structure member, which allows local users to obtain sensitive information from kernel heap memory via a crafted application.

Patch / fix

  • linux Debian 14, Debian 13, Debian 12 3.2.41-1

debian advisories DEBIAN-CVE-2012-6548

  • kernel openstack 3 2.6.32-358.114.1.openstack.el6
  • perf openstack 3 2.6.32-358.114.1.openstack.el6
  • python-perf openstack 3 2.6.32-358.114.1.openstack.el6
  • kernel-firmware openstack 3 2.6.32-358.114.1.openstack.el6
  • kernel-debuginfo-common-x86_64 openstack 3 2.6.32-358.114.1.openstack.el6
  • kernel RHEL 6 2.6.32-358.14.1.el6
  • perf RHEL 6 2.6.32-358.14.1.el6
  • python-perf RHEL 6 2.6.32-358.14.1.el6

red hat advisories RHSA-2013:1080RHSA-2013:1051

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-2012-6548 updated cvss 1.9

Kernel: udf: information leak on export

  • Red Hat Enterprise Linux Desktop (v. 6) perf 2.6.32-358.14.1.el6, kernel 2.6.32-358.14.1.el6, kernel-firmware 2.6.32-358.14.1.el6, kernel-debuginfo-common-i686 2.6.32-358.14.1.el6, kernel-debuginfo-common-x86_64 2.6.32-358.14.1.el6 Red Hat Enterprise Linux Desktop Optional (v. 6) kernel 2.6.32-358.14.1.el6, python-perf 2.6.32-358.14.1.el6, kernel-debuginfo-common-i686 2.6.32-358.14.1.el6, kernel-debuginfo-common-x86_64 2.6.32-358.14.1.el6 Red Hat Enterprise Linux HPC Node (v. 6) perf 2.6.32-358.14.1.el6, kernel 2.6.32-358.14.1.el6, kernel-firmware 2.6.32-358.14.1.el6, kernel-debuginfo-common-x86_64 2.6.32-358.14.1.el6 Red Hat Enterprise Linux HPC Node Optional (v. 6) kernel 2.6.32-358.14.1.el6, python-perf 2.6.32-358.14.1.el6, kernel-debuginfo-common-x86_64 2.6.32-358.14.1.el6
    fixed: vendor fix RHSA-2013:1051
  • Red Hat Enterprise Linux OpenStack Platform 3.0 perf 2.6.32-358.114.1.openstack.el6, kernel 2.6.32-358.114.1.openstack.el6, python-perf 2.6.32-358.114.1.openstack.el6, kernel-firmware 2.6.32-358.114.1.openstack.el6, kernel-debuginfo-common-x86_64 2.6.32-358.114.1.openstack.el6
    fixed: vendor fix RHSA-2013:1080
  • Red Hat Enterprise Linux Server (v. 6) perf 2.6.32-358.14.1.el6, kernel 2.6.32-358.14.1.el6, kernel-kdump 2.6.32-358.14.1.el6, kernel-firmware 2.6.32-358.14.1.el6, kernel-bootwrapper 2.6.32-358.14.1.el6, kernel-debuginfo-common-i686 2.6.32-358.14.1.el6, +3 more Red Hat Enterprise Linux Server Optional (v. 6) kernel 2.6.32-358.14.1.el6, python-perf 2.6.32-358.14.1.el6, kernel-debuginfo-common-i686 2.6.32-358.14.1.el6, kernel-debuginfo-common-ppc64 2.6.32-358.14.1.el6, kernel-debuginfo-common-s390x 2.6.32-358.14.1.el6, kernel-debuginfo-common-x86_64 2.6.32-358.14.1.el6 Red Hat Enterprise Linux Workstation (v. 6) perf 2.6.32-358.14.1.el6, kernel 2.6.32-358.14.1.el6, kernel-firmware 2.6.32-358.14.1.el6, kernel-debuginfo-common-i686 2.6.32-358.14.1.el6, kernel-debuginfo-common-x86_64 2.6.32-358.14.1.el6 Red Hat Enterprise Linux Workstation Optional (v. 6) kernel 2.6.32-358.14.1.el6, python-perf 2.6.32-358.14.1.el6, kernel-debuginfo-common-i686 2.6.32-358.14.1.el6, kernel-debuginfo-common-x86_64 2.6.32-358.14.1.el6
    fixed: vendor fix RHSA-2013:1051
  • Red Hat Enterprise Linux 5 kernel Red Hat Enterprise MRG 2 kernel-rt, mrg-rt-release, kernel-rt-trace, kernel-rt-vanilla, kernel-rt-firmware
    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

0.43% chance of exploitation in the next 30 days, higher than 37% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 1.9 AV:L/AC:M/Au:N/C:P/I:N/A:N

Classification

Weakness
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
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.