Ubuntu 20.04 LTS Linux Kernel Critical Network Issues USN-8273-1
ubuntu
May 19, 2026
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-aws-fips: Linux kernel for Amazon Web Services (AWS) systems with FIPS
- linux-azure: Linux kernel for Microsoft Azure Cloud systems
- linux-azure-fips: Linux kernel for Microsoft Azure Cloud systems with FIPS
- linux-bluefield: Linux kernel for NVIDIA BlueField platforms
- linux-fips: Linux kernel with FIPS
- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-gcp-fips: Linux kernel for Google Cloud Platform (GCP) systems with FIPS
- 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-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 Mi...
Topics Covered
Update Instructions
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 20.04 LTS
linux-image-5.4.0-1062-iot 5.4.0-1062.65
Available with Ubuntu Pro
linux-image-5.4.0-1076-xilinx-zynqmp 5.4.0-1076.80
Available with Ubuntu Pro
linux-image-5.4.0-1104-ibm 5.4.0-1104.109
Available with Ubuntu Pro
linux-image-5.4.0-1117-bluefield 5.4.0-1117.124
Available with Ubuntu Pro
linux-image-5.4.0-1132-fips 5.4.0-1132.142
Available with Ubuntu Pro
linux-image-5.4.0-1145-kvm 5.4.0-1145.154
Available with Ubuntu Pro
linux-image-5.4.0-1156-oracle 5.4.0-1156.166
Available with Ubuntu Pro
linux-image-5.4.0-1158-aws 5.4.0-1158.168
Available with Ubuntu Pro
linux-image-5.4.0-1158-aws-fips 5.4.0-1158.168+fips1
Available with Ubuntu Pro
linux-image-5.4.0-1161-gcp 5.4.0-1161.170
Available with Ubuntu Pro
linux-image-5.4.0-1161-gcp-fips 5.4.0-1161.170+fips1
Available with Ubuntu Pro
linux-image-5.4.0-1162-azure 5.4.0-1162.168
Available with Ubuntu Pro
linux-image-5.4.0-1162-azure-fips 5.4.0-1162.168+fips1
Available with Ubuntu Pro
linux-image-5.4.0-229-generic 5.4.0-229.249
Available with Ubuntu Pro
linux-image-5.4.0-229-generic-lpae 5.4.0-229.249
Available with Ubuntu Pro
linux-image-5.4.0-229-lowlatency 5.4.0-229.249
Available with Ubuntu Pro
linux-image-aws-5.4 5.4.0.1158.155
Available with Ubuntu Pro
linux-image-aws-fips 5.4.0.1158.105
Available with Ubuntu Pro
linux-image-aws-fips-5.4 5.4.0.1158.105
Available with Ubuntu Pro
linux-image-aws-lts-20.04 5.4.0.1158.155
Available with Ubuntu Pro
linux-image-azure-5.4 5.4.0.1162.154
Available with Ubuntu Pro
linux-image-azure-fips 5.4.0.1162.98
Available with Ubuntu Pro
linux-image-azure-fips-5.4 5.4.0.1162.98
Available with Ubuntu Pro
linux-image-azure-lts-20.04 5.4.0.1162.154
Available with Ubuntu Pro
linux-image-bluefield 5.4.0.1117.113
Available with Ubuntu Pro
linux-image-bluefield-5.4 5.4.0.1117.113
Available with Ubuntu Pro
linux-image-fips 5.4.0.1132.129
Available with Ubuntu Pro
linux-image-fips-5.4 5.4.0.1132.129
Available with Ubuntu Pro
linux-image-gcp-5.4 5.4.0.1161.163
Available with Ubuntu Pro
linux-image-gcp-fips 5.4.0.1161.103
Available with Ubuntu Pro
linux-image-gcp-fips-5.4 5.4.0.1161.103
Available with Ubuntu Pro
linux-image-gcp-lts-20.04 5.4.0.1161.163
Available with Ubuntu Pro
linux-image-generic 5.4.0.229.221
Available with Ubuntu Pro
linux-image-generic-5.4 5.4.0.229.221
Available with Ubuntu Pro
linux-image-generic-lpae 5.4.0.229.221
Available with Ubuntu Pro
linux-image-generic-lpae-5.4 5.4.0.229.221
Available with Ubuntu Pro
linux-image-ibm-5.4 5.4.0.1104.133
Available with Ubuntu Pro
linux-image-ibm-lts-20.04 5.4.0.1104.133
Available with Ubuntu Pro
linux-image-kvm 5.4.0.1145.141
Available with Ubuntu Pro
linux-image-kvm-5.4 5.4.0.1145.141
Available with Ubuntu Pro
linux-image-lowlatency 5.4.0.229.221
Available with Ubuntu Pro
linux-image-lowlatency-5.4 5.4.0.229.221
Available with Ubuntu Pro
linux-image-oem 5.4.0.229.221
Available with Ubuntu Pro
linux-image-oem-osp1 5.4.0.229.221
Available with Ubuntu Pro
linux-image-oracle-5.4 5.4.0.1156.150
Available with Ubuntu Pro
linux-image-oracle-lts-20.04 5.4.0.1156.150
Available with Ubuntu Pro
linux-image-virtual 5.4.0.229.221
Available with Ubuntu Pro
linux-image-virtual-5.4 5.4.0.229.221
Available with Ubuntu Pro
linux-image-xilinx-zynqmp 5.4.0.1076.76
Available with Ubuntu Pro
linux-image-xilinx-zynqmp-5.4 5.4.0.1076.76
Available with Ubuntu Pro
Ubuntu 18.04 LTS
linux-image-5.4.0-1104-ibm 5.4.0-1104.109~18.04.1
Available with Ubuntu Pro
linux-image-5.4.0-1156-oracle 5.4.0-1156.166~18.04.2+1
Available with Ubuntu Pro
linux-image-5.4.0-1158-aws 5.4.0-1158.168~18.04.1
Available with Ubuntu Pro
linux-image-5.4.0-1161-gcp 5.4.0-1161.170~18.04.1
Available with Ubuntu Pro
linux-image-5.4.0-1162-azure 5.4.0-1162.168~18.04.1
Available with Ubuntu Pro
linux-image-5.4.0-229-generic 5.4.0-229.249~18.04.1
Available with Ubuntu Pro
linux-image-5.4.0-229-lowlatency 5.4.0-229.249~18.04.1
Available with Ubuntu Pro
linux-image-aws 5.4.0.1158.168~18.04.1
Available with Ubuntu Pro
linux-image-aws-5.4 5.4.0.1158.168~18.04.1
Available with Ubuntu Pro
linux-image-azure 5.4.0.1162.168~18.04.1
Available with Ubuntu Pro
linux-image-azure-5.4 5.4.0.1162.168~18.04.1
Available with Ubuntu Pro
linux-image-gcp 5.4.0.1161.170~18.04.1
Available with Ubuntu Pro
linux-image-gcp-5.4 5.4.0.1161.170~18.04.1
Available with Ubuntu Pro
linux-image-generic-5.4 5.4.0.229.249~18.04.1
Available with Ubuntu Pro
linux-image-generic-hwe-18.04 5.4.0.229.249~18.04.1
Available with Ubuntu Pro
linux-image-ibm 5.4.0.1104.109~18.04.1
Available with Ubuntu Pro
linux-image-ibm-5.4 5.4.0.1104.109~18.04.1
Available with Ubuntu Pro
linux-image-lowlatency-5.4 5.4.0.229.249~18.04.1
Available with Ubuntu Pro
linux-image-lowlatency-hwe-18.04 5.4.0.229.249~18.04.1
Available with Ubuntu Pro
linux-image-oem 5.4.0.229.249~18.04.1
Available with Ubuntu Pro
linux-image-oem-osp1 5.4.0.229.249~18.04.1
Available with Ubuntu Pro
linux-image-oracle 5.4.0.1156.166~18.04.3
Available with Ubuntu Pro
linux-image-oracle-5.4 5.4.0.1156.166~18.04.3
Available with Ubuntu Pro
linux-image-snapdragon-5.4 5.4.0.229.249~18.04.1
Available with Ubuntu Pro
linux-image-snapdragon-hwe-18.04 5.4.0.229.249~18.04.1
Available with Ubuntu Pro
linux-image-virtual-5.4 5.4.0.229.249~18.04.1
Available with Ubuntu Pro
linux-image-virtual-hwe-18.04 5.4.0.229.249~18.04.1
Available with Ubuntu Pro
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.References
https://ubuntu.com/security/notices/USN-8273-1
CVE-2024-50304, CVE-2026-23112, CVE-2026-23209
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Ubuntu Security Notice USN-8273-1
Topics Covered
Package Information
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