========================================================================= Ubuntu Security Notice USN-4626-1 November 11, 2020 linux, linux-aws, linux-azure, linux-gcp, linux-kvm, linux-oracle, linux-raspi vulnerabilities ========================================================================= A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.10 Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux: Linux kernel - linux-aws: Linux kernel for Amazon Web Services (AWS) systems - linux-azure: Linux kernel for Microsoft Azure Cloud systems - linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems - linux-kvm: Linux kernel for cloud environments - linux-oracle: Linux kernel for Oracle Cloud systems - linux-raspi: Linux kernel for Raspberry Pi (V8) systems Details: Simon Scannell discovered that the bpf verifier in the Linux kernel did not properly calculate register bounds for certain operations. A local attacker could use this to expose sensitive information (kernel memory) or gain administrative privileges. (CVE-2020-27194) Moritz Lipp, Michael Schwarz, Andreas Kogler, David Oswald, Catherine Easdon, Claudio Canella, and Daniel Gruss discovered that the Intel Running Average Power Limit (RAPL) driver in the Linux kernel did not properly restrict access to power data. A local attacker could possibly use this to expose sensitive information. (CVE-2020-8694) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 20.10: linux-image-5.8.0-1007-raspi 5.8.0-1007.10 linux-image-5.8.0-1007-raspi-nolpae 5.8.0-1007.10 linux-image-5.8.0-1009-kvm 5.8.0-1009.10 linux-image-5.8.0-1010-oracle 5.8.0-1010.10 linux-image-5.8.0-1011-gcp 5.8.0-1011.11 linux-image-5.8.0-1012-azure 5.8.0-1012.13 linux-image-5.8.0-1013-aws 5.8.0-1013.14 linux-image-5.8.0-28-generic 5.8.0-28.30 linux-image-5.8.0-28-generic-64k 5.8.0-28.30 linux-image-5.8.0-28-generic-lpae 5.8.0-28.30 linux-image-5.8.0-28-lowlatency 5.8.0-28.30 linux-image-aws 5.8.0.1013.15 linux-image-azure 5.8.0.1012.12 linux-image-gcp 5.8.0.1011.11 linux-image-generic 5.8.0.28.33 linux-image-generic-64k 5.8.0.28.33 linux-image-generic-lpae 5.8.0.28.33 linux-image-gke 5.8.0.1011.11 linux-image-kvm 5.8.0.1009.10 linux-image-lowlatency 5.8.0.28.33 linux-image-oem-20.04 5.8.0.28.33 linux-image-oracle 5.8.0.1010.10 linux-image-raspi 5.8.0.1007.10 linux-image-raspi-nolpae 5.8.0.1007.10 linux-image-virtual 5.8.0.28.33 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://usn.ubuntu.com/4626-1 CVE-2020-27194, CVE-2020-8694 Package Information: https://launchpad.net/ubuntu/+source/linux/5.8.0-28.30 https://launchpad.net/ubuntu/+source/linux-aws/5.8.0-1013.14 https://launchpad.net/ubuntu/+source/linux-azure/5.8.0-1012.13 https://launchpad.net/ubuntu/+source/linux-gcp/5.8.0-1011.11 https://launchpad.net/ubuntu/+source/linux-kvm/5.8.0-1009.10 https://launchpad.net/ubuntu/+source/linux-oracle/5.8.0-1010.10 https://launchpad.net/ubuntu/+source/linux-raspi/5.8.0-1007.10