Your submission was sent successfully! Close

You have successfully unsubscribed! Close

Thank you for signing up for our newsletter!
In these regular emails you will find the latest updates about Ubuntu and upcoming events where you can meet our team.Close

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 Severity Score

5.5

Score breakdown

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
(end of life)
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)

Severity score breakdown

Parameter Value
Base score 5.5
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H