Ubuntu 3652-1: Linux kernel vulnerability
Summary
Update Instructions
The problem can be corrected by updating your system to the following package versions: Ubuntu 18.04 LTS: linux-image-4.15.0-1008-gcp 4.15.0-1008.8 linux-image-4.15.0-1009-aws 4.15.0-1009.9 linux-image-4.15.0-1010-kvm 4.15.0-1010.10 linux-image-4.15.0-22-generic 4.15.0-22.24 linux-image-4.15.0-22-generic-lpae 4.15.0-22.24 linux-image-4.15.0-22-lowlatency 4.15.0-22.24 linux-image-aws 4.15.0.1009.9 linux-image-azure 4.15.0.1012.12 linux-image-azure-edge 4.15.0.1012.12 linux-image-gcp 4.15.0.1008.10 linux-image-generic 4.15.0.22.23 linux-image-generic-lpae 4.15.0.22.23 linux-image-gke 4.15.0.1008.10 linux-image-kvm 4.15.0.1010.10 linux-image-lowlatency 4.15.0.22.23 linux-image-oem 4.15.0.1006.8 Please note that fully mitigating CVE-2018-3639 (Spectre Variant 4) may require corresponding processor microcode/firmware updates or, in virtual environments, hypervisor updates. On i386 and amd64 architectures, the SSBD feature is required to enable the kernel mitigations. BIOS vendors will be making updates available for Intel processors that implement SSBD and Ubuntu is working with Intel to provide future microcode updates. Ubuntu users with a processor from a different vendor should contact the vendor to identify necessary firmware updates. Ubuntu provided corresponding QEMU updates for usersof self-hosted virtual environments in USN 3651-1. Ubuntu users in cloud environments should contact the cloud provider to confirm that the hypervisor has been updated to expose the new CPU features to virtual machines.
References
https://ubuntu.com/security/notices/USN-3652-1
CVE-2018-3639, https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/Variant4
Package Information
https://launchpad.net/ubuntu/+source/linux/4.15.0-22.24 https://launchpad.net/ubuntu/+source/linux-aws/4.15.0-1009.9 https://launchpad.net/ubuntu/+source/linux-azure/4.15.0-1012.12 https://launchpad.net/ubuntu/+source/linux-gcp/4.15.0-1008.8 https://launchpad.net/ubuntu/+source/linux-kvm/4.15.0-1010.10 https://launchpad.net/ubuntu/+source/linux-oem/4.15.0-1006.9