Ubuntu 20.04 LTS: USN-5853-1 Critical Kernel Security Update

ubuntu

February 9, 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-gkeop: Linux kernel for Google Container Engine (GKE) systems

- linux-kvm: Linux kernel for cloud environments

- linux-oracle: Linux kernel for Oracle Cloud systems

- linux-raspi: Linux kernel for Raspberry Pi systems

- linux-azure-5.4: Linux kernel for Microsoft Azure cloud systems

- linux-raspi-5.4: Linux kernel for Raspberry Pi systems

Details:

It was discovered that the Broadcom FullMAC USB WiFi driver in the Linux

kernel did not properly perform bounds checking in some situations. A

physically proximate attacker could use this to craft a malicious USB

device that when inserted, could cause a denial of service (system crash)

or possibly execute arbitrary code. (CVE-2022-3628)

It was discovered that a use-after-free vulnera...

Read the Full Advisory

Topics Covered

security advisory critical access control DoS Ubuntu kernel system crash

Update Instructions

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

Ubuntu 20.04 LTS:
   linux-image-5.4.0-1064-gkeop    5.4.0-1064.68
   linux-image-5.4.0-1080-raspi    5.4.0-1080.91
   linux-image-5.4.0-1086-kvm      5.4.0-1086.92
   linux-image-5.4.0-1093-oracle   5.4.0-1093.102
   linux-image-5.4.0-1096-aws      5.4.0-1096.104
   linux-image-5.4.0-1103-azure    5.4.0-1103.109
   linux-image-5.4.0-139-generic   5.4.0-139.156
   linux-image-5.4.0-139-generic-lpae  5.4.0-139.156
   linux-image-5.4.0-139-lowlatency  5.4.0-139.156
   linux-image-aws-lts-20.04       5.4.0.1096.93
   linux-image-azure-lts-20.04     5.4.0.1103.96
   linux-image-generic             5.4.0.139.137
   linux-image-generic-lpae        5.4.0.139.137
   linux-image-gkeop               5.4.0.1064.62
   linux-image-gkeop-5.4           5.4.0.1064.62
   linux-image-kvm                 5.4.0.1086.80
   linux-image-lowlatency          5.4.0.139.137
   linux-image-oem                 5.4.0.139.137
   linux-image-oem-osp1            5.4.0.139.137
   linux-image-oracle-lts-20.04    5.4.0.1093.86
   linux-image-raspi               5.4.0.1080.110
   linux-image-raspi2              5.4.0.1080.110
   linux-image-virtual             5.4.0.139.137

Ubuntu 18.04 LTS:
   linux-image-5.4.0-1080-raspi    5.4.0-1080.91~18.04.1
   linux-image-5.4.0-1103-azure    5.4.0-1103.109~18.04.1
   linux-image-azure               5.4.0.1103.76
   linux-image-raspi-hwe-18.04     5.4.0.1080.77

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.