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CVE-2011-2918

Publication date 25 August 2011

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

5.5 · Medium

Score breakdown

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.

Read the notes from the security team

Status

Package Ubuntu Release Status
linux 11.10 oneiric
Not affected
11.04 natty
Fixed 2.6.38-11.49
10.10 maverick
Fixed 2.6.35-30.60
10.04 LTS lucid
Fixed 2.6.32-34.73
8.04 LTS hardy
Not affected
linux-ec2 11.10 oneiric Not in release
11.04 natty Not in release
10.10 maverick Ignored end of life
10.04 LTS lucid
Fixed 2.6.32-318.37
8.04 LTS hardy Not in release
linux-fsl-imx51 11.10 oneiric Not in release
11.04 natty Not in release
10.10 maverick Not in release
10.04 LTS lucid
Fixed 2.6.31-610.28
8.04 LTS hardy Not in release
linux-lts-backport-maverick 11.10 oneiric Not in release
11.04 natty Not in release
10.10 maverick Not in release
10.04 LTS lucid
Fixed 2.6.35-30.60~lucid1
8.04 LTS hardy Not in release
linux-lts-backport-natty 11.10 oneiric Not in release
11.04 natty Not in release
10.10 maverick Not in release
10.04 LTS lucid
Fixed 2.6.38-11.49~lucid1
8.04 LTS hardy Not in release
linux-lts-backport-oneiric 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-mvl-dove 11.10 oneiric Not in release
11.04 natty Not in release
10.10 maverick
Fixed 2.6.32-418.35
10.04 LTS lucid
Fixed 2.6.32-218.35
8.04 LTS hardy Not in release
linux-ti-omap4 11.10 oneiric
Not affected
11.04 natty
Fixed 2.6.38-1209.15
10.10 maverick
Fixed 2.6.35-903.24
10.04 LTS lucid Not in release
8.04 LTS hardy Not in release

Notes

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

Patch details

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

Package Patch details
linux

Severity score breakdown

Parameter Value
Base score 5.5 · Medium
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

References

Related Ubuntu Security Notices (USN)

    • USN-1204-1
    • Linux kernel (i.MX51) vulnerabilities
    • 13 September 2011
    • USN-1208-1
    • Linux kernel (Marvel DOVE) vulnerabilities
    • 14 September 2011
    • USN-1219-1
    • Linux kernel (Maverick backport) vulnerabilities
    • 29 September 2011
    • USN-1202-1
    • Linux kernel (OMAP4) vulnerabilities
    • 13 September 2011
    • USN-1211-1
    • Linux kernel vulnerabilities
    • 21 September 2011
    • USN-1203-1
    • Linux kernel (Marvel DOVE) vulnerabilities
    • 13 September 2011
    • USN-1218-1
    • Linux kernel vulnerabilities
    • 29 September 2011
    • USN-1227-1
    • Linux kernel vulnerabilities
    • 11 October 2011
    • USN-1256-1
    • Linux kernel (Natty backport) vulnerabilities
    • 9 November 2011
    • USN-1212-1
    • Linux kernel (OMAP4) vulnerabilities
    • 21 September 2011
    • USN-1216-1
    • Linux kernel (EC2) vulnerabilities
    • 26 September 2011

Other references