Ubuntu 3741-2: Linux kernel (Xenial HWE) vulnerabilities
Summary
Update Instructions
The problem can be corrected by updating your system to the following package versions: Ubuntu 14.04 LTS: linux-image-4.4.0-1027-aws 4.4.0-1027.30 linux-image-4.4.0-133-generic 4.4.0-133.159~14.04.1 linux-image-4.4.0-133-generic-lpae 4.4.0-133.159~14.04.1 linux-image-4.4.0-133-lowlatency 4.4.0-133.159~14.04.1 linux-image-4.4.0-133-powerpc-e500mc 4.4.0-133.159~14.04.1 linux-image-4.4.0-133-powerpc-smp 4.4.0-133.159~14.04.1 linux-image-4.4.0-133-powerpc64-emb 4.4.0-133.159~14.04.1 linux-image-4.4.0-133-powerpc64-smp 4.4.0-133.159~14.04.1 linux-image-aws 4.4.0.1027.27 linux-image-generic-lpae-lts-xenial 4.4.0.133.113 linux-image-generic-lts-xenial 4.4.0.133.113 linux-image-lowlatency-lts-xenial 4.4.0.133.113 linux-image-powerpc-e500mc-lts-xenial 4.4.0.133.113 linux-image-powerpc-smp-lts-xenial 4.4.0.133.113 linux-image-powerpc64-emb-lts-xenial 4.4.0.133.113 linux-image-powerpc64-smp-lts-xenial 4.4.0.133.113 Please note that the recommended mitigation for CVE-2018-3646 involves updating processor microcode in addition to updating the kernel; however, the kernel includes a fallback for processors that have not received microcode updates. 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
https://ubuntu.com/security/notices/USN-3741-2
https://ubuntu.com/security/notices/USN-3741-1
CVE-2018-3620, CVE-2018-3646, CVE-2018-5390, CVE-2018-5391,
https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/L1TF
Package Information
https://launchpad.net/ubuntu/+source/linux-aws/4.4.0-1027.30 https://launchpad.net/ubuntu/+source/linux-lts-xenial/4.4.0-133.159~14.04.1