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Fencer Intel
medium 5.2

CVE-2012-1179 json

The Linux kernel before 3.3.1, when KVM is used, allows guest OS users to cause a denial of service (host OS crash) by leveraging administr…

published 2012-05-17 14 y ago modified 2026-06-16 4 mo ago also EUVD-2012-1208

cvss
5.2
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 48%
public exploits
0
none known

Summary

The Linux kernel before 3.3.1, when KVM is used, allows guest OS users to cause a denial of service (host OS crash) by leveraging administrative access to the guest OS, related to the pmd_none_or_clear_bad function and page faults for huge pages.

Patch / fix

  • kernel RHEL 6 2.6.32-220.23.1.el6
  • perf RHEL 6 2.6.32-220.23.1.el6
  • python-perf RHEL 6 2.6.32-220.23.1.el6
  • kernel-kdump RHEL 6 2.6.32-220.23.1.el6
  • kernel-firmware RHEL 6 2.6.32-220.23.1.el6
  • kernel-bootwrapper RHEL 6 2.6.32-220.23.1.el6
  • kernel-debuginfo-common-i686 RHEL 6 2.6.32-220.23.1.el6
  • kernel-debuginfo-common-ppc64 RHEL 6 2.6.32-220.23.1.el6

red hat advisories RHSA-2012:0743RHSA-2012:1042

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-2012-1179 updated cvss 5.2

kernel: thp: __split_huge_page() mapcount != page_mapcount BUG_ON()

  • Red Hat Enterprise Linux Desktop (v. 6) perf 2.6.32-220.23.1.el6, kernel 2.6.32-220.23.1.el6, kernel-firmware 2.6.32-220.23.1.el6, kernel-debuginfo-common-i686 2.6.32-220.23.1.el6, kernel-debuginfo-common-x86_64 2.6.32-220.23.1.el6 Red Hat Enterprise Linux Desktop Optional (v. 6) kernel 2.6.32-220.23.1.el6, python-perf 2.6.32-220.23.1.el6, kernel-debuginfo-common-i686 2.6.32-220.23.1.el6, kernel-debuginfo-common-x86_64 2.6.32-220.23.1.el6 Red Hat Enterprise Linux HPC Node (v. 6) perf 2.6.32-220.23.1.el6, kernel 2.6.32-220.23.1.el6, kernel-firmware 2.6.32-220.23.1.el6, kernel-debuginfo-common-x86_64 2.6.32-220.23.1.el6 Red Hat Enterprise Linux HPC Node Optional (v. 6) kernel 2.6.32-220.23.1.el6, python-perf 2.6.32-220.23.1.el6, kernel-debuginfo-common-x86_64 2.6.32-220.23.1.el6 Red Hat Enterprise Linux Server (v. 6) perf 2.6.32-220.23.1.el6, kernel 2.6.32-220.23.1.el6, kernel-kdump 2.6.32-220.23.1.el6, kernel-firmware 2.6.32-220.23.1.el6, kernel-bootwrapper 2.6.32-220.23.1.el6, kernel-debuginfo-common-i686 2.6.32-220.23.1.el6, +3 more
    fixed: vendor fix RHSA-2012:0743
  • Red Hat Enterprise Linux Server EUS (v. 6.1) perf 2.6.32-131.29.1.el6, kernel 2.6.32-131.29.1.el6, kernel-kdump 2.6.32-131.29.1.el6, kernel-firmware 2.6.32-131.29.1.el6, kernel-bootwrapper 2.6.32-131.29.1.el6, kernel-debuginfo-common-i686 2.6.32-131.29.1.el6, +3 more
    fixed: vendor fix RHSA-2012:1042
  • Red Hat Enterprise Linux Server Optional (v. 6) kernel 2.6.32-220.23.1.el6, python-perf 2.6.32-220.23.1.el6, kernel-debuginfo-common-i686 2.6.32-220.23.1.el6, kernel-debuginfo-common-ppc64 2.6.32-220.23.1.el6, kernel-debuginfo-common-s390x 2.6.32-220.23.1.el6, kernel-debuginfo-common-x86_64 2.6.32-220.23.1.el6 Red Hat Enterprise Linux Workstation (v. 6) perf 2.6.32-220.23.1.el6, kernel 2.6.32-220.23.1.el6, kernel-firmware 2.6.32-220.23.1.el6, kernel-debuginfo-common-i686 2.6.32-220.23.1.el6, kernel-debuginfo-common-x86_64 2.6.32-220.23.1.el6 Red Hat Enterprise Linux Workstation Optional (v. 6) kernel 2.6.32-220.23.1.el6, python-perf 2.6.32-220.23.1.el6, kernel-debuginfo-common-i686 2.6.32-220.23.1.el6, kernel-debuginfo-common-x86_64 2.6.32-220.23.1.el6
    fixed: vendor fix RHSA-2012:0743
  • 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

0.60% chance of exploitation in the next 30 days, higher than 48% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 5.2 AV:A/AC:M/Au:S/C:N/I:N/A:C

Classification

Weakness
  • CWE-264 Permissions, Privileges, and Access Controls
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.