Ubuntu 5086-1: Linux kernel vulnerability
Summary
Update Instructions
The problem can be corrected by updating your system to the following package versions: Ubuntu 21.04: linux-image-5.11.0-36-generic 5.11.0-36.40 linux-image-5.11.0-36-generic-64k 5.11.0-36.40 linux-image-5.11.0-36-generic-lpae 5.11.0-36.40 linux-image-5.11.0-36-lowlatency 5.11.0-36.40 linux-image-generic 5.11.0.36.38 linux-image-generic-64k 5.11.0.36.38 linux-image-generic-lpae 5.11.0.36.38 linux-image-lowlatency 5.11.0.36.38 linux-image-oem-20.04 5.11.0.36.38 linux-image-virtual 5.11.0.36.38 Ubuntu 20.04 LTS: linux-image-5.11.0-36-generic 5.11.0-36.40~20.04.1 linux-image-5.11.0-36-generic-64k 5.11.0-36.40~20.04.1 linux-image-5.11.0-36-generic-lpae 5.11.0-36.40~20.04.1 linux-image-5.11.0-36-lowlatency 5.11.0-36.40~20.04.1 linux-image-5.4.0-86-generic 5.4.0-86.97 linux-image-5.4.0-86-generic-lpae 5.4.0-86.97 linux-image-5.4.0-86-lowlatency 5.4.0-86.97 linux-image-generic 5.4.0.86.90 linux-image-generic-64k-hwe-20.04 5.11.0.36.40~20.04.15 linux-image-generic-hwe-20.04 5.11.0.36.40~20.04.15 linux-image-generic-lpae 5.4.0.86.90 linux-image-generic-lpae-hwe-20.04 5.11.0.36.40~20.04.15 linux-image-lowlatency 5.4.0.86.90 linux-image-lowlatency-hwe-20.04 5.11.0.36.40~20.04.15 linux-image-oem 5.4.0.86.90 linux-image-oem-osp1 5.4.0.86.90 linux-image-virtual 5.4.0.86.90 linux-image-virtual-hwe-20.04 5.11.0.36.40~20.04.15 Ubuntu 18.04 LTS: linux-image-4.15.0-158-generic 4.15.0-158.166 linux-image-4.15.0-158-generic-lpae 4.15.0-158.166 linux-image-4.15.0-158-lowlatency 4.15.0-158.166 linux-image-5.4.0-86-generic 5.4.0-86.97~18.04.1 linux-image-5.4.0-86-generic-lpae 5.4.0-86.97~18.04.1 linux-image-5.4.0-86-lowlatency 5.4.0-86.97~18.04.1 linux-image-generic 4.15.0.158.147 linux-image-generic-hwe-18.04 5.4.0.86.97~18.04.77 linux-image-generic-lpae 4.15.0.158.147 linux-image-generic-lpae-hwe-18.04 5.4.0.86.97~18.04.77 linux-image-lowlatency 4.15.0.158.147 linux-image-lowlatency-hwe-18.04 5.4.0.86.97~18.04.77 linux-image-oem 5.4.0.86.97~18.04.77 linux-image-oem-osp1 5.4.0.86.97~18.04.77 linux-image-snapdragon-hwe-18.04 5.4.0.86.97~18.04.77 linux-image-virtual 4.15.0.158.147 linux-image-virtual-hwe-18.04 5.4.0.86.97~18.04.77 Ubuntu 16.04 ESM: linux-image-4.15.0-158-generic 4.15.0-158.166~16.04.1 linux-image-4.15.0-158-lowlatency 4.15.0-158.166~16.04.1 linux-image-4.4.0-216-generic 4.4.0-216.249 linux-image-4.4.0-216-lowlatency 4.4.0-216.249 linux-image-generic 4.4.0.216.223 linux-image-generic-hwe-16.04 4.15.0.158.151 linux-image-lowlatency 4.4.0.216.223 linux-image-lowlatency-hwe-16.04 4.15.0.158.151 linux-image-oem 4.15.0.158.151 linux-image-virtual 4.4.0.216.223 linux-image-virtual-hwe-16.04 4.15.0.158.151 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-5086-1
https://launchpad.net/bugs/1943960
Package Information
https://launchpad.net/ubuntu/+source/linux/5.11.0-36.40 https://launchpad.net/ubuntu/+source/linux/5.4.0-86.97 https://launchpad.net/ubuntu/+source/linux-hwe-5.11/5.11.0-36.40~20.04.1 https://launchpad.net/ubuntu/+source/linux/4.15.0-158.166 https://launchpad.net/ubuntu/+source/linux-hwe-5.4/5.4.0-86.97~18.04.1