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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.

Notes

AuthorNote
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
Priority

Medium

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)
Patches:
Introduced by

0793a61d4df8daeac6492dbf8d2f3e5713caae5e

Fixed by a8b0ca17b80e92faab46ee7179ba9e99ccb61233
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)