--- title: "CVE-2011-4611\n | Ubuntu" description: Ubuntu is an open source software operating system that runs from the desktop, to the cloud, to all your internet connected things. url: https://ubuntu.com/security/CVE-2011-4611?format=md keywords: index, follow --- # CVE-2011-4611 Publication date 15 December 2011 Last updated 4 July 2026 --- Ubuntu priority **Low** [Why this priority?](https://ubuntu.com/security/cves/about#priority ) Toggle side navigation ## Description Integer overflow in the perf\_event\_interrupt function in arch/powerpc/kernel/perf\_event.c in the Linux kernel before 2.6.39 on powerpc platforms allows local users to cause a denial of service (unhandled performance monitor exception) via vectors that trigger certain outcomes of performance events. ### From the Ubuntu Security Team Maynard Johnson discovered that on POWER7, certain speculative events may raise a performance monitor exception. A local attacker could exploit this to crash the system, leading to a denial of service. [Read the notes from the security team](https://ubuntu.com/security/CVE-2011-4611?format=md#notes) ## Status Show unmaintained releases | Package | Ubuntu Release | Status | | --- | --- | --- | | linux | 12.10 quantal | Not affected | | 12.04 LTS precise | Not affected | | 11.10 oneiric | Not affected | | 11.04 natty | Not affected | | 10.10 maverick | Fixed 2.6.35-29.51 | | 10.04 LTS lucid | Fixed 2.6.32-32.62 | | 8.04 LTS hardy | Not affected | | 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 | Fixed 2.6.32-316.30 | | 8.04 LTS hardy | 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 | Not affected | | 8.04 LTS hardy | 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 | Fixed 2.6.35-30.54~lucid1 | | 8.04 LTS hardy | 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 | Not affected | | 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-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 | Fixed 2.6.32-417.34 | | 10.04 LTS lucid | Fixed 2.6.32-217.34 | | 8.04 LTS hardy | 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 | Not affected | | 10.10 maverick | Not affected | | 10.04 LTS lucid | Not in release | | 8.04 LTS hardy | Not in release | --- * [How can I get the fixes?](https://ubuntu.com/security/cves/about#security) * [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses) * [Patch details](https://ubuntu.com/security/CVE-2011-4611?format=md#patch-details) ## Notes --- ### [jdstrand](https://launchpad.net/~jdstrand) may not apply to Ubuntu. See redhat bug --- ### [apw](https://launchpad.net/~apw) note this can only affect power systems, therefore none of the arm branches can express the issue and so are not-affected ### Patch details For informational purposes only. We recommend not to cherry-pick updates. [How can I get the fixes?](https://ubuntu.com/security/cves/about#security) | Package | Patch details | | --- | --- | | linux | * Introduced by [4574910](https://git.kernel.org/linus/4574910e5087085a1f330ff8373cee4503f5c77c), fixed by [0837e32](https://git.kernel.org/linus/0837e3242c73566fc1c0196b4ec61779c25ffc93) | ## References * [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-4611) * [NVD](https://nvd.nist.gov/vuln/detail/CVE-2011-4611) * [Launchpad](https://launchpad.net/bugs/cve/CVE-2011-4611) * [Debian](https://security-tracker.debian.org/tracker/CVE-2011-4611) ### Related Ubuntu Security Notices (USN) + [USN-1160-1](https://usn.ubuntu.com/USN-1160-1) + Linux kernel vulnerabilities + 28 June 2011 + [USN-1141-1](https://usn.ubuntu.com/USN-1141-1) + Linux kernel vulnerabilities + 1 June 2011 + [USN-1162-1](https://usn.ubuntu.com/USN-1162-1) + Linux kernel vulnerabilities (Marvell Dove) + 29 June 2011 + [USN-1187-1](https://usn.ubuntu.com/USN-1187-1) + Linux kernel (Maverick backport) vulnerabilities + 9 August 2011 + [USN-1159-1](https://usn.ubuntu.com/USN-1159-1) + Linux kernel vulnerabilities (Marvell Dove) + 13 July 2011 ### Other references *