CVE-2011-2918

Published: 25 August 2011

The Performance Events subsystem in the Linux kernel before 3.1 does not properly handle event overflows associated with PERF_COUNT_SW_CPU_CLOCK events, which allows local users to cause a denial of service (system hang) via a crafted application.

From the Ubuntu security team

The performance counter subsystem did not correctly handle certain counters. A local attacker could exploit this to crash the system, leading to a denial of service.

Priority

CVSS 3 base score: 5.5

Status

Package	Release	Status
linux Launchpad, Ubuntu, Debian	hardy	Not vulnerable
	lucid	Released (2.6.32-34.73)
	maverick	Released (2.6.35-30.60)
	natty	Released (2.6.38-11.49)
	oneiric	Not vulnerable (3.0.0-8.10)
	upstream	Released (3.1~rc1)
linux-ec2 Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Released (2.6.32-318.37)
	maverick	Ignored (binary supplied by "linux" now)
	natty	Does not exist
	oneiric	Does not exist
	upstream	Released (3.1~rc1)
linux-fsl-imx51 Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Released (2.6.31-610.28)
	maverick	Does not exist
	natty	Does not exist
	oneiric	Does not exist
	upstream	Released (3.1~rc1)
linux-lts-backport-maverick Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Released (2.6.35-30.60~lucid1)
	maverick	Does not exist
	natty	Does not exist
	oneiric	Does not exist
	upstream	Released (3.1~rc1)
linux-lts-backport-natty Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Released (2.6.38-11.49~lucid1)
	maverick	Does not exist
	natty	Does not exist
	oneiric	Does not exist
	upstream	Released (3.1~rc1)
linux-lts-backport-oneiric Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Not vulnerable
	maverick	Does not exist
	natty	Does not exist
	oneiric	Does not exist
	upstream	Released (3.1~rc1)
linux-mvl-dove Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Released (2.6.32-218.35)
	maverick	Released (2.6.32-418.35)
	natty	Does not exist
	oneiric	Does not exist
	upstream	Released (3.1~rc1)
linux-ti-omap4 Launchpad, Ubuntu, Debian	hardy	Does not exist
	lucid	Does not exist
	maverick	Released (2.6.35-903.24)
	natty	Released (2.6.38-1209.15)
	oneiric	Not vulnerable (3.0.0-1201.4)
	upstream	Released (3.1~rc1)

Notes

Author	Note
jdstrand	https://lkml.org/lkml/2011/7/27/337 (reproducer) https://lkml.org/lkml/2011/7/28/284 (fix)
apw	mainline fix: a8b0ca17b80e92faab46ee7179ba9e99ccb61233 stable fix: 462fee3af72df0de7b60b96c525ffe8baf4db0f0 http://git.kernel.org/?p=linux/kernel/git/stable/linux-3.0.y.git;a=commit;h=462fee3af72df0de7b60b96c525ffe8baf4db0f0

Author

Note

jdstrand

https://lkml.org/lkml/2011/7/27/337 (reproducer)
https://lkml.org/lkml/2011/7/28/284 (fix)

apw

mainline fix: a8b0ca17b80e92faab46ee7179ba9e99ccb61233
stable fix: 462fee3af72df0de7b60b96c525ffe8baf4db0f0
http://git.kernel.org/?p=linux/kernel/git/stable/linux-3.0.y.git;a=commit;h=462fee3af72df0de7b60b96c525ffe8baf4db0f0

References

Bugs

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