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Fencer Intel
medium 4.0

CVE-2012-2133 json

Use-after-free vulnerability in the Linux kernel before 3.3.6, when huge pages are enabled, allows local users to cause a denial of service…

published 2012-07-03 14 y ago modified 2026-06-16 4 mo ago also EUVD-2012-2133

cvss
4.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 28%
public exploits
0
none known

Summary

Use-after-free vulnerability in the Linux kernel before 3.3.6, when huge pages are enabled, allows local users to cause a denial of service (system crash) or possibly gain privileges by interacting with a hugetlbfs filesystem, as demonstrated by a umount operation that triggers improper handling of quota data.

Patch / fix

  • kernel RHEL 6 2.6.32-279.14.1.el6
  • perf RHEL 6 2.6.32-279.14.1.el6
  • python-perf RHEL 6 2.6.32-279.14.1.el6
  • kernel-kdump RHEL 6 2.6.32-279.14.1.el6
  • kernel-firmware RHEL 6 2.6.32-279.14.1.el6
  • kernel-bootwrapper RHEL 6 2.6.32-279.14.1.el6
  • kernel-debuginfo-common-i686 RHEL 6 2.6.32-279.14.1.el6
  • kernel-debuginfo-common-ppc64 RHEL 6 2.6.32-279.14.1.el6

red hat advisories RHSA-2012:1426RHSA-2013:0741RHSA-2012:1491

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-2012-2133 updated cvss 6.2

kernel: use after free bug in "quota" handling

  • Red Hat Enterprise Linux Desktop (v. 6) perf 2.6.32-279.14.1.el6, kernel 2.6.32-279.14.1.el6, kernel-firmware 2.6.32-279.14.1.el6, kernel-debuginfo-common-i686 2.6.32-279.14.1.el6, kernel-debuginfo-common-x86_64 2.6.32-279.14.1.el6 Red Hat Enterprise Linux Desktop Optional (v. 6) kernel 2.6.32-279.14.1.el6, python-perf 2.6.32-279.14.1.el6, kernel-debuginfo-common-i686 2.6.32-279.14.1.el6, kernel-debuginfo-common-x86_64 2.6.32-279.14.1.el6 Red Hat Enterprise Linux HPC Node (v. 6) perf 2.6.32-279.14.1.el6, kernel 2.6.32-279.14.1.el6, kernel-firmware 2.6.32-279.14.1.el6, kernel-debuginfo-common-x86_64 2.6.32-279.14.1.el6 Red Hat Enterprise Linux HPC Node Optional (v. 6) kernel 2.6.32-279.14.1.el6, python-perf 2.6.32-279.14.1.el6, kernel-debuginfo-common-x86_64 2.6.32-279.14.1.el6 Red Hat Enterprise Linux Server (v. 6) perf 2.6.32-279.14.1.el6, kernel 2.6.32-279.14.1.el6, kernel-kdump 2.6.32-279.14.1.el6, kernel-firmware 2.6.32-279.14.1.el6, kernel-bootwrapper 2.6.32-279.14.1.el6, kernel-debuginfo-common-i686 2.6.32-279.14.1.el6, +3 more
    fixed: vendor fix RHSA-2012:1426
  • Red Hat Enterprise Linux Server EUS (v. 6.2) perf 2.6.32-220.34.1.el6, kernel 2.6.32-220.34.1.el6, kernel-kdump 2.6.32-220.34.1.el6, kernel-firmware 2.6.32-220.34.1.el6, kernel-bootwrapper 2.6.32-220.34.1.el6, kernel-debuginfo-common-i686 2.6.32-220.34.1.el6, +3 more
    fixed: vendor fix RHSA-2013:0741
  • Red Hat Enterprise Linux Server Optional (v. 6) kernel 2.6.32-279.14.1.el6, python-perf 2.6.32-279.14.1.el6, kernel-debuginfo-common-i686 2.6.32-279.14.1.el6, kernel-debuginfo-common-ppc64 2.6.32-279.14.1.el6, kernel-debuginfo-common-s390x 2.6.32-279.14.1.el6, kernel-debuginfo-common-x86_64 2.6.32-279.14.1.el6
    fixed: vendor fix RHSA-2012:1426
  • Red Hat Enterprise Linux Server Optional EUS (v. 6.2) kernel 2.6.32-220.34.1.el6, python-perf 2.6.32-220.34.1.el6, kernel-debuginfo-common-i686 2.6.32-220.34.1.el6, kernel-debuginfo-common-ppc64 2.6.32-220.34.1.el6, kernel-debuginfo-common-s390x 2.6.32-220.34.1.el6, kernel-debuginfo-common-x86_64 2.6.32-220.34.1.el6
    fixed: vendor fix RHSA-2013:0741
  • Red Hat Enterprise Linux Workstation (v. 6) perf 2.6.32-279.14.1.el6, kernel 2.6.32-279.14.1.el6, kernel-firmware 2.6.32-279.14.1.el6, kernel-debuginfo-common-i686 2.6.32-279.14.1.el6, kernel-debuginfo-common-x86_64 2.6.32-279.14.1.el6 Red Hat Enterprise Linux Workstation Optional (v. 6) kernel 2.6.32-279.14.1.el6, python-perf 2.6.32-279.14.1.el6, kernel-debuginfo-common-i686 2.6.32-279.14.1.el6, kernel-debuginfo-common-x86_64 2.6.32-279.14.1.el6
    fixed: vendor fix RHSA-2012:1426
  • Red Hat MRG Realtime for RHEL 6 Server v.2 kernel-rt 3.2.33-rt50.66.el6rt, mrg-rt-release 3.2.33-rt50.66.el6rt, kernel-rt-trace 3.2.33-rt50.66.el6rt, kernel-rt-vanilla 3.2.33-rt50.66.el6rt, kernel-rt-firmware 3.2.33-rt50.66.el6rt, kernel-rt-debuginfo-common-x86_64 3.2.33-rt50.66.el6rt
    fixed: vendor fix RHSA-2012:1491
  • Red Hat Enterprise Linux 4 kernel Red Hat Enterprise Linux 5 kernel Red Hat Enterprise MRG 1 kernel
    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

0.34% chance of exploitation in the next 30 days, higher than 28% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 4.0 AV:L/AC:H/Au:N/C:N/I:N/A:C

Classification

Weakness
  • CWE-399 Resource Management Errors
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.