CVE-2011-1083

Publication date 4 April 2011

Last updated 24 July 2024

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.

From the Ubuntu Security Team

Nelson Elhage discovered that the epoll subsystem did not correctly handle certain structures. A local attacker could create malicious requests that would consume large amounts of CPU, leading to a denial of service.

Read the notes from the security team

Status

Show unmaintained releases

No maintained releases are affected by this CVE.

Package	Ubuntu Release	Status
linux	12.10 quantal	Not affected
	12.04 LTS precise	Not affected
	11.10 oneiric	Not affected
	11.04 natty	Ignored end of life
	10.10 maverick	Ignored end of life
	10.04 LTS lucid	Not affected
	9.10 karmic	Ignored
	8.04 LTS hardy	Not affected
	6.06 LTS dapper	Not in release
linux-armadaxp	12.10 quantal	Not affected
	12.04 LTS precise	Not affected
	11.10 oneiric	Not in release
	11.04 natty	Not in release
	10.04 LTS lucid	Not in release
	8.04 LTS hardy	Not in release
linux-ec2	12.10 quantal	Not in release
	12.04 LTS precise	Not in release
	11.10 oneiric	Not in release
	11.04 natty	Not in release
	10.10 maverick	Ignored end of life
	10.04 LTS lucid	Not affected
	9.10 karmic	Ignored end of life
	8.04 LTS hardy	Not in release
	6.06 LTS dapper	Not in release
linux-fsl-imx51	12.10 quantal	Not in release
	12.04 LTS precise	Not in release
	11.10 oneiric	Not in release
	11.04 natty	Not in release
	10.10 maverick	Not in release
	10.04 LTS lucid	Ignored end of life
	9.10 karmic	Ignored end of life
	8.04 LTS hardy	Not in release
	6.06 LTS dapper	Not in release
linux-lts-backport-maverick	12.10 quantal	Not in release
	12.04 LTS precise	Not in release
	11.10 oneiric	Not in release
	11.04 natty	Not in release
	10.10 maverick	Not in release
	10.04 LTS lucid	Ignored end of life
	9.10 karmic	Not in release
	8.04 LTS hardy	Not in release
	6.06 LTS dapper	Not in release
linux-lts-backport-natty	12.10 quantal	Not in release
	12.04 LTS precise	Not in release
	11.10 oneiric	Not in release
	11.04 natty	Not in release
	10.10 maverick	Not in release
	10.04 LTS lucid	Ignored end of life
	8.04 LTS hardy	Not in release
linux-lts-backport-oneiric	12.10 quantal	Not in release
	12.04 LTS precise	Not in release
	11.10 oneiric	Not in release
	11.04 natty	Not in release
	10.10 maverick	Not in release
	10.04 LTS lucid	Not affected
	8.04 LTS hardy	Not in release
linux-lts-quantal	12.10 quantal	Not in release
	12.04 LTS precise	Not affected
	11.10 oneiric	Not in release
	10.04 LTS lucid	Not in release
	8.04 LTS hardy	Not in release
linux-mvl-dove	12.10 quantal	Not in release
	12.04 LTS precise	Not in release
	11.10 oneiric	Not in release
	11.04 natty	Not in release
	10.10 maverick	Ignored end of life
	10.04 LTS lucid	Ignored end of life
	9.10 karmic	Ignored end of life
	8.04 LTS hardy	Not in release
	6.06 LTS dapper	Not in release
linux-ti-omap4	12.10 quantal	Not affected
	12.04 LTS precise	Not affected
	11.10 oneiric	Not affected
	11.04 natty	Ignored end of life
	10.10 maverick	Ignored end of life
	10.04 LTS lucid	Not in release
	9.10 karmic	Not in release
	8.04 LTS hardy	Not in release
	6.06 LTS dapper	Not in release

Notes

henrix

This has been fixed for a while with 93dc6107a76daed81c07f50215fa6ae77691634f

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
linux	Introduced by 1da177e, fixed by 93dc610