Ubuntu 23.04 LTS USN-6318-1 Critical: Multiple Kernel Security 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-azure: Linux kernel for Microsoft Azure Cloud systems

- linux-ibm: Linux kernel for IBM cloud systems

- linux-kvm: Linux kernel for cloud environments

- linux-lowlatency: Linux low latency kernel

- linux-raspi: Linux kernel for Raspberry Pi systems

- linux-aws-6.2: Linux kernel for Amazon Web Services (AWS) systems

- linux-hwe-6.2: Linux hardware enablement (HWE) kernel

- linux-lowlatency-hwe-6.2: Linux low latency 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 vect...

Read the Full Advisory

Topics Covered

security advisory update critical Ubuntu kernel local attack system fix

Update Instructions

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

Ubuntu 23.04:
   linux-image-6.2.0-1008-ibm      6.2.0-1008.8
   linux-image-6.2.0-1010-aws      6.2.0-1010.10
   linux-image-6.2.0-1010-azure    6.2.0-1010.10
   linux-image-6.2.0-1011-kvm      6.2.0-1011.11
   linux-image-6.2.0-1011-lowlatency  6.2.0-1011.11
   linux-image-6.2.0-1011-lowlatency-64k  6.2.0-1011.11
   linux-image-6.2.0-1011-raspi    6.2.0-1011.13
   linux-image-6.2.0-31-generic    6.2.0-31.31
   linux-image-6.2.0-31-generic-64k  6.2.0-31.31
   linux-image-6.2.0-31-generic-lpae  6.2.0-31.31
   linux-image-aws                 6.2.0.1010.11
   linux-image-azure               6.2.0.1010.10
   linux-image-generic             6.2.0.31.29
   linux-image-generic-64k         6.2.0.31.29
   linux-image-generic-lpae        6.2.0.31.29
   linux-image-ibm                 6.2.0.1008.8
   linux-image-kvm                 6.2.0.1011.11
   linux-image-lowlatency          6.2.0.1011.11
   linux-image-lowlatency-64k      6.2.0.1011.11
   linux-image-raspi               6.2.0.1011.14
   linux-image-raspi-nolpae        6.2.0.1011.14
   linux-image-virtual             6.2.0.31.29

Ubuntu 22.04 LTS:
   linux-image-6.2.0-1010-aws      6.2.0-1010.10~22.04.1
   linux-image-6.2.0-1011-lowlatency  6.2.0-1011.11~22.04.1
   linux-image-6.2.0-1011-lowlatency-64k  6.2.0-1011.11~22.04.1
   linux-image-6.2.0-31-generic    6.2.0-31.31~22.04.1
   linux-image-6.2.0-31-generic-64k  6.2.0-31.31~22.04.1
   linux-image-6.2.0-31-generic-lpae  6.2.0-31.31~22.04.1
   linux-image-aws                 6.2.0.1010.10~22.04.1
   linux-image-generic-64k-hwe-22.04  6.2.0.31.31~22.04.8
   linux-image-generic-hwe-22.04   6.2.0.31.31~22.04.8
   linux-image-generic-lpae-hwe-22.04  6.2.0.31.31~22.04.8
   linux-image-lowlatency-64k-hwe-22.04  6.2.0.1011.11~22.04.8
   linux-image-lowlatency-hwe-22.04  6.2.0.1011.11~22.04.8
   linux-image-virtual-hwe-22.04   6.2.0.31.31~22.04.8

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.