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Ubuntu 20.04: Important FIPS Linux Kernel Update USN-7795-3 CVE-2025-38618

ubuntu
Calendar Grey October 8, 2025
Dist Ubuntu Esm H88
Multiple security issues in the Linux kernel for Ubuntu 20.04 LTS require immediate updates to secure AWS systems.
Several security issues were fixed in the Linux kernel.

Summary

A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 20.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux-aws-fips: Linux kernel for Amazon Web Services (AWS) systems with FIPS 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: - Ext4 file system; - Network file system (NFS) server daemon; - Packet sockets; - Network traffic control; - VMware vSockets driver; (CVE-2025-38618, CVE-2025-21796, CVE-2025-37785, CVE-2025-38477, CVE-2025-38617)

Topics%20covered

Topics Covered

security advisory critical Ubuntu kernel system compromise linux-aws-fips

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 20.04 LTS linux-image-5.4.0-1151-aws-fips 5.4.0-1151.161+fips1 Available with Ubuntu Pro linux-image-aws-fips 5.4.0.1151.98 Available with Ubuntu Pro linux-image-aws-fips-5.4 5.4.0.1151.98 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-7795-3

https://ubuntu.com/security/notices/USN-7795-2

https://ubuntu.com/security/notices/USN-7795-1

CVE-2025-21796, CVE-2025-37785, CVE-2025-38477, CVE-2025-38617,

CVE-2025-38618

Severity
critical
Lowest
Low
Medium
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Critical

Ubuntu Security Notice USN-7795-3

Topics%20covered

Topics Covered

security advisory critical Ubuntu kernel system compromise linux-aws-fips

Package Information

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