CVE Database


Impact: Moderate
Public: 2011-03-24
Bugzilla: 714761: CVE-2011-2479 kernel: thp: madvise on top of /dev/zero private mapping can lead to panic


The MITRE CVE dictionary describes this issue as:

The Linux kernel before 2.6.39 does not properly create transparent huge pages in response to a MAP_PRIVATE mmap system call on /dev/zero, which allows local users to cause a denial of service (system crash) via a crafted application.

Find out more about CVE-2011-2479 from the MITRE CVE dictionary and NIST NVD.


The versions of the Linux kernel as shipped with Red Hat Enterprise Linux 4, 5, and Red Hat Enterprise MRG are not affected because they do not provide support for THP (Transparent Huge Pages). This has been addressed in Red Hat Enterprise Linux 6 via

CVSS v2 metrics

Base Score: 4.9
Base Metrics: AV:L/AC:L/Au:N/C:N/I:N/A:C
Access Vector: Local
Access Complexity: Low
Authentication: None
Confidentiality Impact: None
Integrity Impact: None
Availability Impact: Complete

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat security errata

Platform Errata Release Date
Red Hat Enterprise Linux version 6 (kernel) RHSA-2011:0928 July 12, 2011

External References

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For clarification or corrections please contact the Red Hat Security Response Team.