Ubuntu 20.04 LTS Kernel Critical Security Issues USN-7990-1
ubuntu
January 30, 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-gcp: Linux kernel for Google Cloud Platform (GCP) systems
- linux-ibm: Linux kernel for IBM cloud systems
- linux-iot: Linux kernel for IoT platforms
- linux-kvm: Linux kernel for cloud environments
- linux-aws-5.4: Linux kernel for Amazon Web Services (AWS) 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:
Several security issues were discovered in the Linux kernel.
An attacker could possibly use these to compromise the system.
This update corrects flaws in the following subsystems:
- Cryptographic API;
- Padata parallel execution mechanism;
- Netfilter;
(CVE-2022-49698, CVE-2025-21726, CVE-2025-40019)
Topics Covered
Update Instructions
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 20.04 LTS
linux-image-5.4.0-1058-iot 5.4.0-1058.61
Available with Ubuntu Pro
linux-image-5.4.0-1100-ibm 5.4.0-1100.105
Available with Ubuntu Pro
linux-image-5.4.0-1141-kvm 5.4.0-1141.150
Available with Ubuntu Pro
linux-image-5.4.0-1154-aws 5.4.0-1154.164
Available with Ubuntu Pro
linux-image-5.4.0-1157-gcp 5.4.0-1157.166
Available with Ubuntu Pro
linux-image-5.4.0-225-generic 5.4.0-225.245
Available with Ubuntu Pro
linux-image-5.4.0-225-generic-lpae 5.4.0-225.245
Available with Ubuntu Pro
linux-image-5.4.0-225-lowlatency 5.4.0-225.245
Available with Ubuntu Pro
linux-image-aws-5.4 5.4.0.1154.151
Available with Ubuntu Pro
linux-image-aws-lts-20.04 5.4.0.1154.151
Available with Ubuntu Pro
linux-image-gcp-5.4 5.4.0.1157.159
Available with Ubuntu Pro
linux-image-gcp-lts-20.04 5.4.0.1157.159
Available with Ubuntu Pro
linux-image-generic 5.4.0.225.217
Available with Ubuntu Pro
linux-image-generic-5.4 5.4.0.225.217
Available with Ubuntu Pro
linux-image-generic-lpae 5.4.0.225.217
Available with Ubuntu Pro
linux-image-generic-lpae-5.4 5.4.0.225.217
Available with Ubuntu Pro
linux-image-ibm-5.4 5.4.0.1100.129
Available with Ubuntu Pro
linux-image-ibm-lts-20.04 5.4.0.1100.129
Available with Ubuntu Pro
linux-image-kvm 5.4.0.1141.137
Available with Ubuntu Pro
linux-image-kvm-5.4 5.4.0.1141.137
Available with Ubuntu Pro
linux-image-lowlatency 5.4.0.225.217
Available with Ubuntu Pro
linux-image-lowlatency-5.4 5.4.0.225.217
Available with Ubuntu Pro
linux-image-oem 5.4.0.225.217
Available with Ubuntu Pro
linux-image-oem-osp1 5.4.0.225.217
Available with Ubuntu Pro
linux-image-virtual 5.4.0.225.217
Available with Ubuntu Pro
linux-image-virtual-5.4 5.4.0.225.217
Available with Ubuntu Pro
Ubuntu 18.04 LTS
linux-image-5.4.0-1100-ibm 5.4.0-1100.105~18.04.1
Available with Ubuntu Pro
linux-image-5.4.0-1154-aws 5.4.0-1154.164~18.04.1
Available with Ubuntu Pro
linux-image-5.4.0-1157-gcp 5.4.0-1157.166~18.04.1
Available with Ubuntu Pro
linux-image-5.4.0-225-generic 5.4.0-225.245~18.04.1
Available with Ubuntu Pro
linux-image-5.4.0-225-lowlatency 5.4.0-225.245~18.04.1
Available with Ubuntu Pro
linux-image-aws 5.4.0.1154.164~18.04.1
Available with Ubuntu Pro
linux-image-aws-5.4 5.4.0.1154.164~18.04.1
Available with Ubuntu Pro
linux-image-gcp 5.4.0.1157.166~18.04.1
Available with Ubuntu Pro
linux-image-gcp-5.4 5.4.0.1157.166~18.04.1
Available with Ubuntu Pro
linux-image-generic-5.4 5.4.0.225.245~18.04.1
Available with Ubuntu Pro
linux-image-generic-hwe-18.04 5.4.0.225.245~18.04.1
Available with Ubuntu Pro
linux-image-ibm 5.4.0.1100.105~18.04.1
Available with Ubuntu Pro
linux-image-ibm-5.4 5.4.0.1100.105~18.04.1
Available with Ubuntu Pro
linux-image-ibm-edge 5.4.0.1100.105~18.04.1
Available with Ubuntu Pro
linux-image-lowlatency-5.4 5.4.0.225.245~18.04.1
Available with Ubuntu Pro
linux-image-lowlatency-hwe-18.04 5.4.0.225.245~18.04.1
Available with Ubuntu Pro
linux-image-oem 5.4.0.225.245~18.04.1
Available with Ubuntu Pro
linux-image-oem-osp1 5.4.0.225.245~18.04.1
Available with Ubuntu Pro
linux-image-snapdragon-5.4 5.4.0.225.245~18.04.1
Available with Ubuntu Pro
linux-image-snapdragon-hwe-18.04 5.4.0.225.245~18.04.1
Available with Ubuntu Pro
linux-image-virtual-5.4 5.4.0.225.245~18.04.1
Available with Ubuntu Pro
linux-image-virtual-hwe-18.04 5.4.0.225.245~18.04.1
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-7990-1
CVE-2022-49698, CVE-2025-21726, CVE-2025-40019
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Ubuntu Security Notice USN-7990-1
Topics Covered
Package Information
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