--- title: 'USN-3126-1: Linux kernel vulnerabilities | Ubuntu security notices' 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/notices/USN-3126-1 --- 1. [Ubuntu Security Notices](https://ubuntu.com/security/notices) 2. USN-3126-1 --- # USN-3126-1: Linux kernel vulnerabilities Publication date 11 November 2016 Overview Several security issues were fixed in the kernel. Releases [12.04](https://ubuntu.com/security/notices?release=precise) --- Open side navigation ## Packages * [linux](https://ubuntu.com/security/cves?package=linux) - Linux kernel ## Details Ondrej Kozina discovered that the keyring interface in the Linux kernel contained a buffer overflow when displaying timeout events via the /proc/keys interface. A local attacker could use this to cause a denial of service (system crash). ([CVE-2016-7042](https://ubuntu.com/security/CVE-2016-7042)) Dmitry Vyukov discovered a use-after-free vulnerability during error processing in the recvmmsg(2) implementation in the Linux kernel. A remote attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code. ([CVE-2016-7117](https://ubuntu.com/security/CVE-2016-7117)) ## Update instructions After a standard system update you need to reboot your computer to make all the necessary changes. [Learn more about how to get the fixes.](https://ubuntu.com/security/cves/about#security) ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well. The problem can be corrected by updating your system to the following package versions: | Ubuntu Release | Package Version | | --- | --- | | 12.04 precise | [linux-image-3.2.0-115-generic](https://launchpad.net/ubuntu/+source/linux) –  [3.2.0-115.157](https://launchpad.net/ubuntu/+source/linux/3.2.0-115.157) | | | | [linux-image-3.2.0-115-powerpc-smp](https://launchpad.net/ubuntu/+source/linux) –  [3.2.0-115.157](https://launchpad.net/ubuntu/+source/linux/3.2.0-115.157) | | | | [linux-image-powerpc](https://launchpad.net/ubuntu/+source/linux) –  [3.2.0.115.131](https://launchpad.net/ubuntu/+source/linux/3.2.0-115.157) | | | | [linux-image-3.2.0-115-virtual](https://launchpad.net/ubuntu/+source/linux) –  [3.2.0-115.157](https://launchpad.net/ubuntu/+source/linux/3.2.0-115.157) | | | | [linux-image-3.2.0-115-highbank](https://launchpad.net/ubuntu/+source/linux) –  [3.2.0-115.157](https://launchpad.net/ubuntu/+source/linux/3.2.0-115.157) | | | | [linux-image-3.2.0-115-omap](https://launchpad.net/ubuntu/+source/linux) –  [3.2.0-115.157](https://launchpad.net/ubuntu/+source/linux/3.2.0-115.157) | | | | [linux-image-highbank](https://launchpad.net/ubuntu/+source/linux) –  [3.2.0.115.131](https://launchpad.net/ubuntu/+source/linux/3.2.0-115.157) | | | | [linux-image-powerpc-smp](https://launchpad.net/ubuntu/+source/linux) –  [3.2.0.115.131](https://launchpad.net/ubuntu/+source/linux/3.2.0-115.157) | | | | [linux-image-virtual](https://launchpad.net/ubuntu/+source/linux) –  [3.2.0.115.131](https://launchpad.net/ubuntu/+source/linux/3.2.0-115.157) | | | | [linux-image-3.2.0-115-generic-pae](https://launchpad.net/ubuntu/+source/linux) –  [3.2.0-115.157](https://launchpad.net/ubuntu/+source/linux/3.2.0-115.157) | | | | [linux-image-powerpc64-smp](https://launchpad.net/ubuntu/+source/linux) –  [3.2.0.115.131](https://launchpad.net/ubuntu/+source/linux/3.2.0-115.157) | | | | [linux-image-generic-pae](https://launchpad.net/ubuntu/+source/linux) –  [3.2.0.115.131](https://launchpad.net/ubuntu/+source/linux/3.2.0-115.157) | | | | [linux-image-generic](https://launchpad.net/ubuntu/+source/linux) –  [3.2.0.115.131](https://launchpad.net/ubuntu/+source/linux/3.2.0-115.157) | | | | [linux-image-omap](https://launchpad.net/ubuntu/+source/linux) –  [3.2.0.115.131](https://launchpad.net/ubuntu/+source/linux/3.2.0-115.157) | | | | [linux-image-3.2.0-115-powerpc64-smp](https://launchpad.net/ubuntu/+source/linux) –  [3.2.0-115.157](https://launchpad.net/ubuntu/+source/linux/3.2.0-115.157) | | | --- ### Reduce your security exposure Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines. [Get Ubuntu Pro](https://ubuntu.com/pro) ## References * [CVE-2016-7117](https://ubuntu.com/security/CVE-2016-7117) * [CVE-2016-7042](https://ubuntu.com/security/CVE-2016-7042) ## Related notices * [USN-3161-3](https://ubuntu.com/security/notices/USN-3161-3) * [USN-3129-1](https://ubuntu.com/security/notices/USN-3129-1) * [USN-3129-2](https://ubuntu.com/security/notices/USN-3129-2) * [USN-3128-1](https://ubuntu.com/security/notices/USN-3128-1) * [USN-3128-3](https://ubuntu.com/security/notices/USN-3128-3) * [USN-3128-2](https://ubuntu.com/security/notices/USN-3128-2) * [USN-3127-1](https://ubuntu.com/security/notices/USN-3127-1) * [USN-3127-2](https://ubuntu.com/security/notices/USN-3127-2) * [USN-3126-2](https://ubuntu.com/security/notices/USN-3126-2) --- Have additional questions? [Talk to a member of the team ›](https://wiki.ubuntu.com/SecurityTeam/FAQ?_ga=2.242131138.1744859116.1742138161-1500419473.1726851136&_gl=1*161muja*_gcl_au*MzUyMTIzNjI1LjE3MzYyNDQ4NTE.#Contact)