CVE-2011-1083

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ModerateModerate ImpactWhat does this mean?

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Description

The CVE Program describes this issue as:

The epoll implementation in the Linux kernel 2.6.37.2 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.

Statement

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.

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.

Additional information

  • Bugzilla 681578: kernel: excessive in kernel CPU consumption when creating large nested epoll structures
  • FAQ: Frequently asked questions about CVE-2011-1083

Common Vulnerability Scoring System (CVSS) Score Details

Important note

CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).

CVSS v2 Score Breakdown
Red HatNVD

CVSS v2 Base Score

4.9

4.9

Attack Vector

Local

Local

Access Complexity

Low

Low

Authentication

None

None

Confidentiality Impact

None

None

Integrity Impact

None

None

Availability Impact

Complete

Complete

CVSS v2 Vector

Red Hat: AV:L/AC:L/Au:N/C:N/I:N/A:C

NVD: AV:L/AC:L/Au:N/C:N/I:N/A:C

Acknowledgements

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

Frequently Asked Questions

Why is Red Hat's CVSS v3 score or Impact different from other vendors?

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I have a Red Hat product but it is not in the above list, is it affected?

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