--- title: "CVE-2011-1076\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-2011-1076?format=md keywords: index, follow --- # CVE-2011-1076 Publication date 4 March 2011 Last updated 4 July 2026 --- Ubuntu priority **Low** [Why this priority?](https://ubuntu.com/security/cves/about#priority ) Toggle side navigation ## Description net/dns\_resolver/dns\_key.c in the Linux kernel before 2.6.38 allows remote DNS servers to cause a denial of service (NULL pointer dereference and OOPS) by not providing a valid response to a DNS query, as demonstrated by an erroneous grand.centrall.org query, which triggers improper handling of error data within a DNS resolver key. ### From the Ubuntu Security Team It was discovered that the key-based DNS resolver did not correctly handle certain error states. 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 | 11.04 natty | Fixed 2.6.38-6.33 | | 10.10 maverick | Not affected | | 10.04 LTS lucid | Not affected | | 9.10 karmic | Ignored | | 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 | Ignored end of life | | 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 | Ignored end of life | | 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 | Not affected | | 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 | Ignored | | linux-ti-omap4 | 11.04 natty | Fixed 2.6.38-1205.6 | | 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-2011-1076?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 [4a2d789](https://git.kernel.org/linus/4a2d789267e00b5a1175ecd2ddefcc78b83fbf09), fixed by [1362fa0](https://git.kernel.org/linus/1362fa078dae16776cd439791c6605b224ea6171) | ## References * [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-1076) * [NVD](https://nvd.nist.gov/vuln/detail/CVE-2011-1076) * [Launchpad](https://launchpad.net/bugs/cve/CVE-2011-1076) * [Debian](https://security-tracker.debian.org/tracker/CVE-2011-1076) ### Other references *