Ubuntu 20.04 LTS USN-6648-1 Critical: Kernel Race Condition Issues

ubuntu

February 22, 2024

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-bluefield: Linux kernel for NVIDIA BlueField platforms

- 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-iot: Linux kernel for IoT platforms

- linux-kvm: Linux kernel for cloud environments

- linux-oracle: Linux kernel for Oracle Cloud systems

- linux-raspi: Linux kernel for Raspberry Pi systems

- linux-xilinx-zynqmp: Linux kernel for Xilinx ZynqMP processors

- linux-aws-5.4: Linux kernel for Amazon Web Services (AWS) 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

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

Detail...

Read the Full Advisory

Topics Covered

security advisory denial of service critical 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-5.4.0-1031-iot      5.4.0-1031.32
   linux-image-5.4.0-1038-xilinx-zynqmp  5.4.0-1038.42
   linux-image-5.4.0-1066-ibm      5.4.0-1066.71
   linux-image-5.4.0-1079-bluefield  5.4.0-1079.85
   linux-image-5.4.0-1086-gkeop    5.4.0-1086.90
   linux-image-5.4.0-1103-raspi    5.4.0-1103.115
   linux-image-5.4.0-1107-kvm      5.4.0-1107.114
   linux-image-5.4.0-1118-oracle   5.4.0-1118.127
   linux-image-5.4.0-1119-aws      5.4.0-1119.129
   linux-image-5.4.0-1123-gcp      5.4.0-1123.132
   linux-image-5.4.0-172-generic   5.4.0-172.190
   linux-image-5.4.0-172-generic-lpae  5.4.0-172.190
   linux-image-5.4.0-172-lowlatency  5.4.0-172.190
   linux-image-aws-lts-20.04       5.4.0.1119.116
   linux-image-bluefield           5.4.0.1079.74
   linux-image-gcp-lts-20.04       5.4.0.1123.125
   linux-image-generic             5.4.0.172.170
   linux-image-generic-lpae        5.4.0.172.170
   linux-image-gkeop               5.4.0.1086.84
   linux-image-gkeop-5.4           5.4.0.1086.84
   linux-image-ibm-lts-20.04       5.4.0.1066.95
   linux-image-kvm                 5.4.0.1107.103
   linux-image-lowlatency          5.4.0.172.170
   linux-image-oem                 5.4.0.172.170
   linux-image-oem-osp1            5.4.0.172.170
   linux-image-oracle-lts-20.04    5.4.0.1118.111
   linux-image-raspi               5.4.0.1103.133
   linux-image-raspi2              5.4.0.1103.133
   linux-image-virtual             5.4.0.172.170
   linux-image-xilinx-zynqmp       5.4.0.1038.38

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
   linux-image-5.4.0-1066-ibm      5.4.0-1066.71~18.04.1
   linux-image-5.4.0-1103-raspi    5.4.0-1103.115~18.04.1
   linux-image-5.4.0-1118-oracle   5.4.0-1118.127~18.04.1
   linux-image-5.4.0-1119-aws      5.4.0-1119.129~18.04.1
   linux-image-5.4.0-172-generic   5.4.0-172.190~18.04.1
   linux-image-5.4.0-172-lowlatency  5.4.0-172.190~18.04.1
   linux-image-aws                 5.4.0.1119.97
   linux-image-generic-hwe-18.04   5.4.0.172.190~18.04.140
   linux-image-ibm                 5.4.0.1066.76
   linux-image-lowlatency-hwe-18.04  5.4.0.172.190~18.04.140
   linux-image-oem                 5.4.0.172.190~18.04.140
   linux-image-oem-osp1            5.4.0.172.190~18.04.140
   linux-image-oracle              5.4.0.1118.127~18.04.90
   linux-image-raspi-hwe-18.04     5.4.0.1103.100
   linux-image-snapdragon-hwe-18.04  5.4.0.172.190~18.04.140
   linux-image-virtual-hwe-18.04   5.4.0.172.190~18.04.140

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.