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Linux Kernel (FIPS) Vulnerabilities — Ubuntu Security Update (USN-9027-2)

USN-9027-2 updates Ubuntu 20.04, Ubuntu 22.04: Several security issues were discovered in the Linux kernel. Apply the update via standard apt tooling and reboot — kernel fixes need a reboot to take effect.

High
Ubuntu 20.04 Ubuntu 22.04

What this means under a SharedLicense license

The advisory's own severity data peaks at CVSS ; unpatched Ubuntu 20.04, Ubuntu 22.04 servers remain exposed until updated.

  1. Ubuntu Security Notices

  2. USN-9027-2

Publication date

13 November 2026

Overview

Several security issues were fixed in the Linux kernel.

Releases


22.04 LTS

Packages

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:

  • x86 architecture;
  • Hardware monitoring drivers;
  • OCFS2 file system;
  • IPv4 networking;
  • Ethernet bridge;
  • Netfilter;
  • XFRM subsystem

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:

  • x86 architecture;
  • Hardware monitoring drivers;
  • OCFS2 file system;
  • IPv4 networking;
  • Ethernet bridge;
  • Netfilter;
  • XFRM subsystem

Update instructions

After a standard system update you need to reboot your computer to make
all the necessary changes.

Learn more about how to get the fixes.

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.

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

Ubuntu Release Package Version
22.04 LTS jammy linux-image-5.15.0-203-fips –  5.15.0-203.213+fips1   FIPS Updates FIPS-140 certified package with security fixes. Available with Ubuntu Pro.
linux-image-fips –  5.15.0.203.117   FIPS Updates FIPS-140 certified package with security fixes. Available with Ubuntu Pro.
linux-image-fips-5.15 –  5.15.0.203.117   FIPS Updates FIPS-140 certified package with security fixes. Available with Ubuntu Pro.

References

Related notices

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Have additional questions?

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Frequently Asked Questions

What does USN-9027-2 fix?
Several security issues were discovered in the Linux kernel.
Which Ubuntu releases are covered?
Ubuntu 20.04, Ubuntu 22.04.
How do I apply it?
Standard package update (apt), then reboot.

References

Security Advisories

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2026-11-13

Linux Kernel (HWE) Vulnerabilities — Ubuntu Security Update (USN-9018-2)

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Apache HTTP Server Vulnerabilities — Ubuntu Security Update (USN-9090-1)

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