Ubuntu 20.04 LTS USN-6548-1 critical: kernel DoS and out-of-bounds issues

ubuntu

December 11, 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-bluefield: Linux kernel for NVIDIA BlueField platforms

- 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-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-gcp-5.4: Linux kernel for Google Cloud Platform (GCP) systems

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

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

Details:

It was discovered that Spectre-BHB mitigations were missing for Ampere

processors. A local attacker could potentially use this to expo...

Read the Full Advisory

Topics Covered

security advisory denial of service kernel system update ubuntu out-of-bounds

Update Instructions

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

Ubuntu 20.04 LTS:
   linux-image-5.4.0-1035-xilinx-zynqmp  5.4.0-1035.39
   linux-image-5.4.0-1063-ibm      5.4.0-1063.68
   linux-image-5.4.0-1076-bluefield  5.4.0-1076.82
   linux-image-5.4.0-1104-kvm      5.4.0-1104.111
   linux-image-5.4.0-1116-aws      5.4.0-1116.126
   linux-image-5.4.0-1120-gcp      5.4.0-1120.129
   linux-image-5.4.0-1121-azure    5.4.0-1121.128
   linux-image-5.4.0-169-generic   5.4.0-169.187
   linux-image-5.4.0-169-generic-lpae  5.4.0-169.187
   linux-image-5.4.0-169-lowlatency  5.4.0-169.187
   linux-image-aws-lts-20.04       5.4.0.1116.113
   linux-image-azure-lts-20.04     5.4.0.1121.114
   linux-image-bluefield           5.4.0.1076.71
   linux-image-gcp-lts-20.04       5.4.0.1120.122
   linux-image-generic             5.4.0.169.167
   linux-image-generic-lpae        5.4.0.169.167
   linux-image-ibm-lts-20.04       5.4.0.1063.92
   linux-image-kvm                 5.4.0.1104.100
   linux-image-lowlatency          5.4.0.169.167
   linux-image-oem                 5.4.0.169.167
   linux-image-oem-osp1            5.4.0.169.167
   linux-image-virtual             5.4.0.169.167
   linux-image-xilinx-zynqmp       5.4.0.1035.35

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
   linux-image-5.4.0-1063-ibm      5.4.0-1063.68~18.04.1
   linux-image-5.4.0-1116-aws      5.4.0-1116.126~18.04.1
   linux-image-5.4.0-1120-gcp      5.4.0-1120.129~18.04.1
   linux-image-5.4.0-1121-azure    5.4.0-1121.128~18.04.1
   linux-image-5.4.0-169-generic   5.4.0-169.187~18.04.1
   linux-image-5.4.0-169-lowlatency  5.4.0-169.187~18.04.1
   linux-image-aws                 5.4.0.1116.94
   linux-image-azure               5.4.0.1121.94
   linux-image-gcp                 5.4.0.1120.96
   linux-image-generic-hwe-18.04   5.4.0.169.187~18.04.137
   linux-image-ibm                 5.4.0.1063.73
   linux-image-lowlatency-hwe-18.04  5.4.0.169.187~18.04.137
   linux-image-oem                 5.4.0.169.187~18.04.137
   linux-image-oem-osp1            5.4.0.169.187~18.04.137
   linux-image-snapdragon-hwe-18.04  5.4.0.169.187~18.04.137
   linux-image-virtual-hwe-18.04   5.4.0.169.187~18.04.137

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.