Ubuntu 22.10: USN-5970-1 Critical: Kernel Security Issues Fixed

ubuntu

March 24, 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-azure: Linux kernel for Microsoft Azure Cloud systems

- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems

- linux-ibm: Linux kernel for IBM cloud systems

- linux-kvm: Linux kernel for cloud environments

- linux-lowlatency: Linux low latency kernel

- linux-oracle: Linux kernel for Oracle Cloud systems

- linux-raspi: Linux kernel for Raspberry Pi systems

Details:

It was discovered that the KVM VMX implementation in the Linux kernel did

not properly handle indirect branch prediction isolation between L1 and L2

VMs. An attacker in a guest VM could use this to expose sensitive

information from the host OS or other guest VMs. (CVE-2022-2196)

It was discovered that a race condition existed in the Xen network backend

driver in the Linux kernel when handling dropped packets in certa...

Read the Full Advisory

Topics Covered

security advisory denial of service kernel update instructions ubuntu system crash info exposure

Update Instructions

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

Ubuntu 22.10:
   linux-image-5.19.0-1015-raspi   5.19.0-1015.22
   linux-image-5.19.0-1015-raspi-nolpae  5.19.0-1015.22
   linux-image-5.19.0-1019-gcp     5.19.0-1019.21
   linux-image-5.19.0-1019-ibm     5.19.0-1019.21
   linux-image-5.19.0-1019-oracle  5.19.0-1019.22
   linux-image-5.19.0-1020-kvm     5.19.0-1020.21
   linux-image-5.19.0-1021-lowlatency  5.19.0-1021.22
   linux-image-5.19.0-1021-lowlatency-64k  5.19.0-1021.22
   linux-image-5.19.0-1022-aws     5.19.0-1022.23
   linux-image-5.19.0-1022-azure   5.19.0-1022.23
   linux-image-5.19.0-38-generic   5.19.0-38.39
   linux-image-5.19.0-38-generic-64k  5.19.0-38.39
   linux-image-5.19.0-38-generic-lpae  5.19.0-38.39
   linux-image-aws                 5.19.0.1022.19
   linux-image-azure               5.19.0.1022.18
   linux-image-gcp                 5.19.0.1019.16
   linux-image-generic             5.19.0.38.34
   linux-image-generic-64k         5.19.0.38.34
   linux-image-generic-lpae        5.19.0.38.34
   linux-image-ibm                 5.19.0.1019.16
   linux-image-kvm                 5.19.0.1020.17
   linux-image-lowlatency          5.19.0.1021.17
   linux-image-lowlatency-64k      5.19.0.1021.17
   linux-image-oracle              5.19.0.1019.16
   linux-image-raspi               5.19.0.1015.14
   linux-image-raspi-nolpae        5.19.0.1015.14
   linux-image-virtual             5.19.0.38.34

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.