Ubuntu 20.04 & 18.04 USN-6317-1 Moderate: Linux Kernel Issues

ubuntu

August 29, 2023

Several security issues were fixed in the Linux kernel.

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-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-xilinx-zynqmp: Linux kernel for Xilinx ZynqMP processors

- linux-aws-5.4: Linux kernel for Amazon Web Services (AWS) systems

- linux-hwe-5.4: Linux hardware enablement (HWE) kernel

Details:

Daniel Moghimi discovered that some Intel(R) Processors did not properly

clear microarchitectural state after speculative execution of various

instructions. A local unprivileged user could use this to obtain to

sensitive information. (CVE-2022-40982)

Tavis Ormandy discovered that some AMD processors did not properly handle

speculative execution of certain vector register instructions. A local

attacker could use this to expose sensitive...

Read the Full Advisory

Topics Covered

security advisory DoS Ubuntu kernel system crash Intel issue AMD issue

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.04 LTS:
   linux-image-5.4.0-1028-xilinx-zynqmp  5.4.0-1028.32
   linux-image-5.4.0-1097-kvm      5.4.0-1097.103
   linux-image-5.4.0-1107-oracle   5.4.0-1107.116
   linux-image-5.4.0-1108-aws      5.4.0-1108.116
   linux-image-5.4.0-1111-gcp      5.4.0-1111.120
   linux-image-5.4.0-159-generic   5.4.0-159.176
   linux-image-5.4.0-159-generic-lpae  5.4.0-159.176
   linux-image-5.4.0-159-lowlatency  5.4.0-159.176
   linux-image-aws-lts-20.04       5.4.0.1108.105
   linux-image-gcp-lts-20.04       5.4.0.1111.113
   linux-image-generic             5.4.0.159.154
   linux-image-generic-lpae        5.4.0.159.154
   linux-image-kvm                 5.4.0.1097.92
   linux-image-lowlatency          5.4.0.159.154
   linux-image-oem                 5.4.0.159.154
   linux-image-oem-osp1            5.4.0.159.154
   linux-image-oracle-lts-20.04    5.4.0.1107.100
   linux-image-virtual             5.4.0.159.154
   linux-image-xilinx-zynqmp       5.4.0.1028.30

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
   linux-image-5.4.0-1108-aws      5.4.0-1108.116~18.04.1
   linux-image-5.4.0-159-generic   5.4.0-159.176~18.04.1
   linux-image-5.4.0-159-generic-lpae  5.4.0-159.176~18.04.1
   linux-image-5.4.0-159-lowlatency  5.4.0-159.176~18.04.1
   linux-image-aws                 5.4.0.1108.86
   linux-image-generic-hwe-18.04   5.4.0.159.176~18.04.127
   linux-image-generic-lpae-hwe-18.04  5.4.0.159.176~18.04.127
   linux-image-lowlatency-hwe-18.04  5.4.0.159.176~18.04.127
   linux-image-oem                 5.4.0.159.176~18.04.127
   linux-image-oem-osp1            5.4.0.159.176~18.04.127
   linux-image-snapdragon-hwe-18.04  5.4.0.159.176~18.04.127
   linux-image-virtual-hwe-18.04   5.4.0.159.176~18.04.127

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.