--- title: "CVE-2011-0709\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-2011-0709?format=md keywords: index, follow --- # CVE-2011-0709 Publication date 18 February 2011 Last updated 25 August 2025 --- Ubuntu priority **Medium** [Why this priority?](https://ubuntu.com/security/cves/about#priority ) ## Cvss 3 Severity Score **7.5 · High** [Score breakdown](https://ubuntu.com/security/CVE-2011-0709?format=md#impact-score) Toggle side navigation ## Description The br\_mdb\_ip\_get function in net/bridge/br\_multicast.c in the Linux kernel before 2.6.35-rc5 allows remote attackers to cause a denial of service (NULL pointer dereference and system crash) via an IGMP packet, related to lack of a multicast table. ### From the Ubuntu Security Team Frank Arnold discovered that the IGMP protocol did not correctly parse certain packets. A remote attacker could send specially crafted traffic to crash the system, leading to a denial of service. [Read the notes from the security team](https://ubuntu.com/security/CVE-2011-0709?format=md#notes) ## Status Show unmaintained releases | Package | Ubuntu Release | Status | | --- | --- | --- | | linux | 11.04 natty | Not affected | | 10.10 maverick | Fixed 2.6.35-8.13 | | 10.04 LTS lucid | Not affected | | 9.10 karmic | Not affected | | 9.04 jaunty | Not affected | | 8.04 LTS hardy | Not affected | | 6.06 LTS dapper | Not in release | | linux-ec2 | 11.04 natty | Not in release | | 10.10 maverick | Ignored end of life | | 10.04 LTS lucid | Not affected | | 9.10 karmic | Not affected | | 8.04 LTS hardy | Not in release | | 6.06 LTS dapper | Not in release | | linux-fsl-imx51 | 11.04 natty | Not in release | | 10.10 maverick | Not in release | | 10.04 LTS lucid | Not affected | | 9.10 karmic | Not affected | | 8.04 LTS hardy | Not in release | | 6.06 LTS dapper | Not in release | | linux-lts-backport-maverick | 11.04 natty | Not in release | | 10.10 maverick | Not in release | | 10.04 LTS lucid | Fixed 2.6.35-8.13~lucid1 | | 9.10 karmic | Not in release | | 8.04 LTS hardy | Not in release | | 6.06 LTS dapper | Not in release | | linux-lts-backport-natty | 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 | 11.04 natty | Not in release | | 10.10 maverick | Not affected | | 10.04 LTS lucid | Not affected | | 9.10 karmic | Ignored end of life | | 8.04 LTS hardy | Not in release | | 6.06 LTS dapper | Not in release | | linux-source-2.6.15 | 11.04 natty | Not in release | | 10.10 maverick | Not in release | | 10.04 LTS lucid | Not in release | | 9.10 karmic | Not in release | | 8.04 LTS hardy | Not in release | | 6.06 LTS dapper | Not affected | | linux-ti-omap4 | 11.04 natty | Not affected | | 10.10 maverick | Not affected | | 10.04 LTS lucid | Not in release | | 9.10 karmic | Not in release | | 8.04 LTS hardy | Not in release | | 6.06 LTS dapper | 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-2011-0709?format=md#patch-details) ## Notes --- ### [sbeattie](https://launchpad.net/~sbeattie) occurred between 2.6.35-rc1 and 2.6.35-rc5, see http://openwall.com/lists/oss-security/2011/02/16/1 ### 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 | * Upstream: | ## Severity score breakdown CVSS version: CVSS v3.0 **Base score** 7.5 · High * Base metrics | Parameter | Value | | --- | --- | | Attack vector | Network | | Attack complexity | Low | | Privileges required | None | | User interaction | None | | Scope | Unchanged | | Confidentiality impact | None | | Integrity impact | None | | Availability impact | High | * Scores | Parameter | Value | | --- | --- | | Base score | 7.5 · High | | Exploitability score | - | | Impact score | - | **Vector:** CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H ## References * [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-0709) * [NVD](https://nvd.nist.gov/vuln/detail/CVE-2011-0709) * [Launchpad](https://launchpad.net/bugs/cve/CVE-2011-0709) * [Debian](https://security-tracker.debian.org/tracker/CVE-2011-0709) ### Related Ubuntu Security Notices (USN) + [USN-1083-1](https://usn.ubuntu.com/USN-1083-1) + Linux kernel vulnerabilities + 3 March 2011 ### Other references *