Ubuntu 20.04 LTS USN-6441-1 Critical: Linux Kernel Buffer Overflow

ubuntu

October 20, 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-gkeop: Linux kernel for Google Container Engine (GKE) systems

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

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

- linux-ibm-5.4: Linux kernel for IBM cloud systems

- linux-oracle-5.4: Linux kernel for Oracle Cloud systems

Details:

Ross Lagerwall discovered that the Xen netback backend driver in the Linux

kernel di...

Read the Full Advisory

Topics Covered

security advisory denial of service buffer overflow critical severity ubuntu linux kernel cloud systems

Update Instructions

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

Ubuntu 20.04 LTS:
   linux-image-5.4.0-1032-xilinx-zynqmp  5.4.0-1032.36
   linux-image-5.4.0-1059-ibm      5.4.0-1059.64
   linux-image-5.4.0-1079-gkeop    5.4.0-1079.83
   linux-image-5.4.0-1101-kvm      5.4.0-1101.107
   linux-image-5.4.0-1111-oracle   5.4.0-1111.120
   linux-image-5.4.0-1112-aws      5.4.0-1112.121
   linux-image-5.4.0-1116-gcp      5.4.0-1116.125
   linux-image-5.4.0-1118-azure    5.4.0-1118.125
   linux-image-5.4.0-165-generic   5.4.0-165.182
   linux-image-5.4.0-165-generic-lpae  5.4.0-165.182
   linux-image-5.4.0-165-lowlatency  5.4.0-165.182
   linux-image-aws-lts-20.04       5.4.0.1112.109
   linux-image-azure-lts-20.04     5.4.0.1118.111
   linux-image-gcp-lts-20.04       5.4.0.1116.118
   linux-image-generic             5.4.0.165.162
   linux-image-generic-lpae        5.4.0.165.162
   linux-image-gkeop               5.4.0.1079.77
   linux-image-gkeop-5.4           5.4.0.1079.77
   linux-image-ibm-lts-20.04       5.4.0.1059.88
   linux-image-kvm                 5.4.0.1101.96
   linux-image-lowlatency          5.4.0.165.162
   linux-image-oem                 5.4.0.165.162
   linux-image-oem-osp1            5.4.0.165.162
   linux-image-oracle-lts-20.04    5.4.0.1111.104
   linux-image-virtual             5.4.0.165.162
   linux-image-xilinx-zynqmp       5.4.0.1032.32

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
   linux-image-5.4.0-1059-ibm      5.4.0-1059.64~18.04.1
   linux-image-5.4.0-1111-oracle   5.4.0-1111.120~18.04.1
   linux-image-5.4.0-1112-aws      5.4.0-1112.121~18.04.2
   linux-image-5.4.0-1118-azure    5.4.0-1118.125~18.04.1
   linux-image-5.4.0-165-generic   5.4.0-165.182~18.04.1
   linux-image-5.4.0-165-lowlatency  5.4.0-165.182~18.04.1
   linux-image-aws                 5.4.0.1112.90
   linux-image-azure               5.4.0.1118.91
   linux-image-generic-hwe-18.04   5.4.0.165.182~18.04.132
   linux-image-ibm                 5.4.0.1059.70
   linux-image-lowlatency-hwe-18.04  5.4.0.165.182~18.04.132
   linux-image-oem                 5.4.0.165.182~18.04.132
   linux-image-oem-osp1            5.4.0.165.182~18.04.132
   linux-image-oracle              5.4.0.1111.120~18.04.83
   linux-image-snapdragon-hwe-18.04  5.4.0.165.182~18.04.132
   linux-image-virtual-hwe-18.04   5.4.0.165.182~18.04.132

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.