Ubuntu 4950-1: Linux kernel vulnerabilities
Summary
Update Instructions
The problem can be corrected by updating your system to the following package versions: Ubuntu 21.04: linux-image-5.11.0-1005-azure 5.11.0-1005.5 linux-image-5.11.0-1006-oracle 5.11.0-1006.6 linux-image-5.11.0-1007-aws 5.11.0-1007.7 linux-image-5.11.0-1007-gcp 5.11.0-1007.7 linux-image-5.11.0-1007-kvm 5.11.0-1007.7 linux-image-5.11.0-1008-raspi 5.11.0-1008.8 linux-image-5.11.0-1008-raspi-nolpae 5.11.0-1008.8 linux-image-5.11.0-17-generic 5.11.0-17.18 linux-image-5.11.0-17-generic-64k 5.11.0-17.18 linux-image-5.11.0-17-generic-lpae 5.11.0-17.18 linux-image-5.11.0-17-lowlatency 5.11.0-17.18 linux-image-aws 5.11.0.1007.7 linux-image-azure 5.11.0.1005.5 linux-image-gcp 5.11.0.1007.7 linux-image-generic 5.11.0.17.18 linux-image-generic-64k 5.11.0.17.18 linux-image-generic-lpae 5.11.0.17.18 linux-image-gke 5.11.0.1007.7 linux-image-kvm 5.11.0.1007.7 linux-image-lowlatency 5.11.0.17.18 linux-image-oracle 5.11.0.1006.6 linux-image-raspi 5.11.0.1008.6 linux-image-raspi-nolpae 5.11.0.1008.6 linux-image-virtual 5.11.0.17.18 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-4950-1
CVE-2021-3489, CVE-2021-3490, CVE-2021-3491, https://launchpad.net/bugs/1927409
Package Information
https://launchpad.net/ubuntu/+source/linux/5.11.0-17.18 https://launchpad.net/ubuntu/+source/linux-aws/5.11.0-1007.7 https://launchpad.net/ubuntu/+source/linux-azure/5.11.0-1005.5 https://launchpad.net/ubuntu/+source/linux-gcp/5.11.0-1007.7 https://launchpad.net/ubuntu/+source/linux-kvm/5.11.0-1007.7 https://launchpad.net/ubuntu/+source/linux-oracle/5.11.0-1006.6 https://launchpad.net/ubuntu/+source/linux-raspi/5.11.0-1008.8