I am using "Ubuntu 20.04.4 LTS" and in response to a OS kernel vulnerability reported by canonical as per a security notice below I intend to upgrade the linux kernel

[ USN-5317-1: Linux kernel vulnerabilitie][1] [1]: [

I was under the impression that upgrading kernel to the latest version should do the trick and that should be as easy as "apt dist-upgrade "

My existing kernel version as shown by uname -r is

# uname -r 5.4.0 -92-Generic

so in order to upgrade all packages including the kernel I ran

apt dist-upgrade reboot # after reboot uname -r 5.4.0-104-generic

However since this isnt showing me desired kernel version I perform following specific package installs manually

enter code here apt -y install linux-image-5.13.0-35-generic apt -y install linux-image-5.13.0-35-generic apt -y install linux-image-5.13.0-1017-aws apt -y install linux-image-virtual-hwe-20.04 apt -y install linux-image-aws apt -y install linux-image-lowlatency-hwe-20.04 apt -y install linux-image-5.14.0-1027-oem apt -y install linux-image-5.13.0-1017-azure apt -y install linux-image-oem-20.04c apt -y install linux-image-oem-20.04b apt -y install linux-image-oem-20.04d apt -y install linux-image-generic-hwe-20.04 apt -y install linux-image-azure apt -y install linux-image-oem-20.04 apt -y install linux-image-5.13.0-1019-gcp apt -y install linux-image-5.13.0-35-lowlatency apt -y install linux-image-gcp apt -y install linux-image-5.13.0-1021-oracle apt -y install linux-image-oracle reboot

And then I see that the kernel is upgraded as follows to 5.13.0

uname -sr Linux 5.13.0-35-generic

So the question are as follows

  1. This is a daft question; but how do I list all kernel packages
  2. Why does not apt dist-upgrade upgrade kernel to 5.13.0 if that is a later version ; why is it necessary to install specific packages like I did

Thanks for your help

Yogesh

6

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