========================================================================== Ubuntu Security Notice USN-3167-1 January 11, 2017 linux vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 12.04 LTS Summary: Several security issues were fixed in the kernel. Software Description: - linux: Linux kernel Details: Dmitry Vyukov discovered that the KVM implementation in the Linux kernel did not properly initialize the Code Segment (CS) in certain error cases. A local attacker could use this to expose sensitive information (kernel memory). Baozeng Ding discovered a race condition that could lead to a use-after- free in the Advanced Linux Sound Architecture (ALSA) subsystem of the Linux kernel. A local attacker could use this to cause a denial of service (system crash). (CVE-2016-9794) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 12.04 LTS: linux-image-3.2.0-120-generic 3.2.0-120.163 linux-image-3.2.0-120-generic-pae 3.2.0-120.163 linux-image-3.2.0-120-highbank 3.2.0-120.163 linux-image-3.2.0-120-omap 3.2.0-120.163 linux-image-3.2.0-120-powerpc-smp 3.2.0-120.163 linux-image-3.2.0-120-powerpc64-smp 3.2.0-120.163 linux-image-3.2.0-120-virtual 3.2.0-120.163 linux-image-generic 3.2.0.120.135 linux-image-generic-pae 3.2.0.120.135 linux-image-highbank 3.2.0.120.135 linux-image-omap 3.2.0.120.135 linux-image-powerpc-smp 3.2.0.120.135 linux-image-powerpc64-smp 3.2.0.120.135 linux-image-virtual 3.2.0.120.135 After a standard system update you need to reboot your computer to make all the necessary changes. 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. References: http://www.ubuntu.com/usn/usn-3167-1 CVE-2016-9756, CVE-2016-9794 Package Information: https://launchpad.net/ubuntu/+source/linux/3.2.0-120.163