CVE Database


Impact: Moderate
Public: 2011-02-25
Bugzilla: 681578: CVE-2011-1083 kernel: excessive in kernel CPU consumption when creating large nested epoll structures


The MITRE CVE dictionary describes this issue as:

The epoll implementation in the Linux kernel and earlier does not properly traverse a tree of epoll file descriptors, which allows local users to cause a denial of service (CPU consumption) via a crafted application that makes epoll_create and epoll_ctl system calls.

Find out more about CVE-2011-1083 from the MITRE CVE dictionary and NIST NVD.


This issue affected the versions of Linux kernel as shipped with Red Hat Enterprise Linux 4, 5, 6, and Red Hat Enterprise MRG. It was addressed in Red Hat Enterprise Linux 5 and 6 via RHSA-2012:0150 and RHSA-2012:0862 respectively. There is no plan to address this flaw in Red Hat Enterprise Linux 4. Future updates may address this issue in Red Hat Enterprise MRG.

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
MRG Grid for RHEL 6 Server v.2 (kernel-rt) RHBA-2012:0496 April 18, 2012
Red Hat Enterprise Linux Server EUS (v. 6.2) (kernel) RHSA-2012:1129 July 31, 2012
Red Hat Enterprise Linux version 5 (kernel) RHSA-2012:0150 February 21, 2012
Red Hat Enterprise Linux version 6 (kernel) RHSA-2012:0862 June 19, 2012

External References


Red Hat would like to thank Nelson Elhage for reporting this issue.

This page is generated automatically and has not been checked for errors or omissions.

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