--- title: 'USN-2777-1: Linux kernel (Utopic HWE) 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-2777-1 --- 1. [Ubuntu Security Notices](https://ubuntu.com/security/notices) 2. USN-2777-1 --- # USN-2777-1: Linux kernel (Utopic HWE) vulnerabilities Publication date 20 October 2015 Overview Several security issues were fixed in the kernel. Releases [14.04 LTS](https://ubuntu.com/security/notices?release=trusty) --- Open side navigation ## Packages * [linux-lts-utopic](https://ubuntu.com/security/cves?package=linux-lts-utopic) - Linux hardware enablement kernel from Utopic ## Details It was discovered that virtio networking in the Linux kernel did not handle fragments correctly, leading to kernel memory corruption. A remote attacker could use this to cause a denial of service (system crash) or possibly execute code with administrative privileges. ([CVE-2015-5156](https://ubuntu.com/security/CVE-2015-5156)) Benjamin Randazzo discovered an information leak in the md (multiple device) driver when the bitmap\_info.file is disabled. A local privileged attacker could use this to obtain sensitive information from the kernel. ([CVE-2015-5697](https://ubuntu.com/security/CVE-2015-5697)) Marc-André Lureau discovered that the vhost driver did not properly release the userspace provided log file descriptor. A privileged attacker could use this to cause a denial of service (resource exhaustion). ([CVE-2015-6252](https://ubuntu.com/security/CVE-2015-6252)) It was discovered that the Reliable Datagram Sockets (RDS) implementation in... --- Show more ## 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. If you use linux-restricted-modules, you have to update that package as well to get modules which work with the new kernel version. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-server, 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 | | --- | --- | | 14.04 LTS trusty | [linux-image-3.16.0-51-generic](https://launchpad.net/ubuntu/+source/linux-lts-utopic) –  [3.16.0-51.69~14.04.1](https://launchpad.net/ubuntu/+source/linux-lts-utopic/3.16.0-51.69~14.04.1) | | | | [linux-image-3.16.0-51-generic-lpae](https://launchpad.net/ubuntu/+source/linux-lts-utopic) –  [3.16.0-51.69~14.04.1](https://launchpad.net/ubuntu/+source/linux-lts-utopic/3.16.0-51.69~14.04.1) | | | | [linux-image-3.16.0-51-lowlatency](https://launchpad.net/ubuntu/+source/linux-lts-utopic) –  [3.16.0-51.69~14.04.1](https://launchpad.net/ubuntu/+source/linux-lts-utopic/3.16.0-51.69~14.04.1) | | | | [linux-image-3.16.0-51-powerpc-e500mc](https://launchpad.net/ubuntu/+source/linux-lts-utopic) –  [3.16.0-51.69~14.04.1](https://launchpad.net/ubuntu/+source/linux-lts-utopic/3.16.0-51.69~14.04.1) | | | | [linux-image-3.16.0-51-powerpc-smp](https://launchpad.net/ubuntu/+source/linux-lts-utopic) –  [3.16.0-51.69~14.04.1](https://launchpad.net/ubuntu/+source/linux-lts-utopic/3.16.0-51.69~14.04.1) | | | | [linux-image-3.16.0-51-powerpc64-emb](https://launchpad.net/ubuntu/+source/linux-lts-utopic) –  [3.16.0-51.69~14.04.1](https://launchpad.net/ubuntu/+source/linux-lts-utopic/3.16.0-51.69~14.04.1) | | | | [linux-image-3.16.0-51-powerpc64-smp](https://launchpad.net/ubuntu/+source/linux-lts-utopic) –  [3.16.0-51.69~14.04.1](https://launchpad.net/ubuntu/+source/linux-lts-utopic/3.16.0-51.69~14.04.1) | | | --- ### 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-2015-7312](https://ubuntu.com/security/CVE-2015-7312) * [CVE-2015-6937](https://ubuntu.com/security/CVE-2015-6937) * [CVE-2015-6252](https://ubuntu.com/security/CVE-2015-6252) * [CVE-2015-5697](https://ubuntu.com/security/CVE-2015-5697) * [CVE-2015-5156](https://ubuntu.com/security/CVE-2015-5156) ## Related notices * [USN-2779-1](https://ubuntu.com/security/notices/USN-2779-1) * [USN-2778-1](https://ubuntu.com/security/notices/USN-2778-1) * [USN-2776-1](https://ubuntu.com/security/notices/USN-2776-1) * [USN-2775-1](https://ubuntu.com/security/notices/USN-2775-1) * [USN-2774-1](https://ubuntu.com/security/notices/USN-2774-1) * [USN-2773-1](https://ubuntu.com/security/notices/USN-2773-1) * [USN-2760-1](https://ubuntu.com/security/notices/USN-2760-1) * [USN-2759-1](https://ubuntu.com/security/notices/USN-2759-1) * [USN-2752-1](https://ubuntu.com/security/notices/USN-2752-1) * [USN-2751-1](https://ubuntu.com/security/notices/USN-2751-1) --- Show 4 more references --- Have additional questions? 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