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Ubuntu 20.04 LTS Linux Kernel Important Vulnerabilities USN-7990-5

ubuntu
Calendar Grey February 19, 2026
Dist Ubuntu Esm H88
Critical updates for Ubuntu Linux kernel vulnerabilities ensure system security and stability. Update instructions included.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-azure: Linux kernel for Microsoft Azure Cloud systems

- linux-azure-fips: Linux kernel for Microsoft Azure Cloud systems with FIPS

- linux-azure-5.4: Linux kernel for Microsoft Azure 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%20covered

Topics Covered

security advisory Ubuntu important system compromise Linux kernel Azure

Update Instructions

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

Ubuntu 20.04 LTS
   linux-image-5.4.0-1157-azure    5.4.0-1157.164
                                   Available with Ubuntu Pro
   linux-image-5.4.0-1158-azure-fips  5.4.0-1158.165+fips1
                                   Available with Ubuntu Pro
   linux-image-azure-5.4           5.4.0.1157.151
                                   Available with Ubuntu Pro
   linux-image-azure-fips          5.4.0.1158.95
                                   Available with Ubuntu Pro
   linux-image-azure-fips-5.4      5.4.0.1158.95
                                   Available with Ubuntu Pro
   linux-image-azure-lts-20.04     5.4.0.1157.151
                                   Available with Ubuntu Pro

Ubuntu 18.04 LTS
   linux-image-5.4.0-1157-azure    5.4.0-1157.164~18.04.1
                                   Available with Ubuntu Pro
   linux-image-azure               5.4.0.1157.164~18.04.1
                                   Available with Ubuntu Pro
   linux-image-azure-5.4           5.4.0.1157.164~18.04.1
                                   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-7990-5

https://ubuntu.com/security/notices/USN-7990-4

https://ubuntu.com/security/notices/USN-7990-3

https://ubuntu.com/security/notices/USN-7990-2

https://ubuntu.com/security/notices/USN-7990-1

CVE-2022-49698, CVE-2025-21726, CVE-2025-40019

Severity
important
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-7990-5

Topics%20covered

Topics Covered

security advisory Ubuntu important system compromise Linux kernel Azure

Package Information

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