--- title: "CVE-2011-2183\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-2011-2183?format=md keywords: index, follow --- # CVE-2011-2183 Publication date 6 October 2011 Last updated 4 July 2026 --- Ubuntu priority **Medium** [Why this priority?](https://ubuntu.com/security/cves/about#priority ) Toggle side navigation ## Description Race condition in the scan\_get\_next\_rmap\_item function in mm/ksm.c in the Linux kernel before 2.6.39.3, when Kernel SamePage Merging (KSM) is enabled, allows local users to cause a denial of service (NULL pointer dereference) or possibly have unspecified other impact via a crafted application. ### From the Ubuntu Security Team Andrea Righi discovered a race condition in the KSM memory merging support. If KSM was being used, a local attacker could exploit this to crash the system, leading to a denial of service. ## Status Show unmaintained releases | Package | Ubuntu Release | Status | | --- | --- | --- | | linux-goldfish | 14.04 LTS trusty | Not in release | | 13.10 saucy | Ignored | | 12.10 quantal | Not in release | | 12.04 LTS precise | Not in release | | 10.04 LTS lucid | Not in release | | linux-grouper | 14.04 LTS trusty | Not in release | | 13.10 saucy | Ignored | | 12.10 quantal | Not in release | | 12.04 LTS precise | Not in release | | 10.04 LTS lucid | Not in release | | linux-maguro | 14.04 LTS trusty | Not in release | | 13.10 saucy | Ignored | | 12.10 quantal | Not in release | | 12.04 LTS precise | Not in release | | 10.04 LTS lucid | Not in release | | linux-mako | 14.04 LTS trusty | Not in release | | 13.10 saucy | Ignored | | 12.10 quantal | Not in release | | 12.04 LTS precise | Not in release | | 10.04 LTS lucid | Not in release | | linux-manta | 14.04 LTS trusty | Not in release | | 13.10 saucy | Ignored | | 12.10 quantal | Not in release | | 12.04 LTS precise | Not in release | | 10.04 LTS lucid | Not in release | | linux-flo | 14.04 LTS trusty | Not in release | | 13.10 saucy | Not in release | | 12.10 quantal | Not in release | | 12.04 LTS precise | Not in release | | 10.04 LTS lucid | Not in release | | linux | 14.04 LTS trusty | Not affected | | 13.10 saucy | Not affected | | 12.10 quantal | Not affected | | 12.04 LTS precise | Not affected | | 11.10 oneiric | Not affected | | 11.04 natty | Fixed 2.6.38-13.52 | | 10.10 maverick | Fixed 2.6.35-31.62 | | 10.04 LTS lucid | Fixed 2.6.32-34.77 | | 8.04 LTS hardy | Not affected | | linux-ec2 | 14.04 LTS trusty | Not in release | | 13.10 saucy | Not in release | | 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 2.6.32-318.38 | | 8.04 LTS hardy | Not in release | | linux-fsl-imx51 | 14.04 LTS trusty | Not in release | | 13.10 saucy | Not in release | | 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 | 14.04 LTS trusty | Not in release | | 13.10 saucy | Not in release | | 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 2.6.35-31.62~lucid1 | | 8.04 LTS hardy | Not in release | | linux-lts-backport-natty | 14.04 LTS trusty | Not in release | | 13.10 saucy | Not in release | | 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 2.6.38-13.52~lucid1 | | 8.04 LTS hardy | Not in release | | linux-lts-backport-oneiric | 14.04 LTS trusty | Not in release | | 13.10 saucy | Not in release | | 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 | 14.04 LTS trusty | Not in release | | 13.10 saucy | Not in release | | 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 2.6.32-418.35 | | 10.04 LTS lucid | Fixed 2.6.32-218.35 | | 8.04 LTS hardy | Not in release | | linux-ti-omap4 | 14.04 LTS trusty | Not in release | | 13.10 saucy | Not affected | | 12.10 quantal | Not affected | | 12.04 LTS precise | Not affected | | 11.10 oneiric | Not affected | | 11.04 natty | Fixed 2.6.38-1209.17 | | 10.10 maverick | Fixed 2.6.35-903.26 | | 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-2011-2183?format=md#patch-details) ### 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 [f8af4da](https://git.kernel.org/linus/f8af4da3b4c14e7267c4ffb952079af3912c51c5), fixed by [2b47261](https://git.kernel.org/linus/2b472611a32a72f4a118c069c2d62a1a3f087afd) | ## References * [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-2183) * [NVD](https://nvd.nist.gov/vuln/detail/CVE-2011-2183) * [Launchpad](https://launchpad.net/bugs/cve/CVE-2011-2183) * [Debian](https://security-tracker.debian.org/tracker/CVE-2011-2183) ### Related Ubuntu Security Notices (USN) + [USN-1272-1](https://usn.ubuntu.com/USN-1272-1) + Linux kernel vulnerabilities + 21 November 2011 + [USN-1281-1](https://usn.ubuntu.com/USN-1281-1) + Linux (OMAP4) vulnerabilities + 24 November 2011 + [USN-1285-1](https://usn.ubuntu.com/USN-1285-1) + Linux kernel vulnerabilities + 29 November 2011 + [USN-1203-1](https://usn.ubuntu.com/USN-1203-1) + Linux kernel (Marvel DOVE) vulnerabilities + 13 September 2011 + [USN-1279-1](https://usn.ubuntu.com/USN-1279-1) + Linux (Natty backport) vulnerabilities + 24 November 2011 + [USN-1278-1](https://usn.ubuntu.com/USN-1278-1) + Linux (Maverick backport) vulnerabilities + 24 November 2011 + [USN-1218-1](https://usn.ubuntu.com/USN-1218-1) + Linux kernel vulnerabilities + 29 September 2011 + [USN-1244-1](https://usn.ubuntu.com/USN-1244-1) + Linux kernel (OMAP4) vulnerabilities + 25 October 2011 + [USN-1208-1](https://usn.ubuntu.com/USN-1208-1) + Linux kernel (Marvel DOVE) vulnerabilities + 14 September 2011 + [USN-1216-1](https://usn.ubuntu.com/USN-1216-1) + Linux kernel (EC2) vulnerabilities + 26 September 2011 ### Other references *