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[USN-8730-5] Linux kernel vulnerability

Posted on 22 September 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8730-5
September 22, 2026

linux-aws, linux-aws-5.15, linux-aws-fips, linux-nvidia-tegra-igx
vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS

Summary:

A security issue was fixed in the Linux kernel.

Software Description:
- linux-aws: Linux kernel for Amazon Web Services (AWS) systems
- linux-aws-fips: Linux kernel for Amazon Web Services (AWS) systems with FIPS
- linux-nvidia-tegra-igx: Linux kernel for NVIDIA Tegra IGX systems
- linux-aws-5.15: Linux kernel for Amazon Web Services (AWS) systems

Details:

A security issue was discovered in the Linux kernel.
An attacker could possibly use this to compromise the system.
This update corrects flaws in the following subsystems:
- IPv6 networking;
- Netfilter;

Update instructions:

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

Ubuntu 22.04 LTS
linux-image-5.15.0-1056-nvidia-tegra-igx 5.15.0-1056.56
linux-image-5.15.0-1056-nvidia-tegra-igx-rt 5.15.0-1056.56
linux-image-5.15.0-1115-aws 5.15.0-1115.122
linux-image-5.15.0-1115-aws-64k 5.15.0-1115.122
linux-image-5.15.0-1115-aws-fips 5.15.0-1115.122+fips1
Available with Ubuntu Pro
linux-image-aws-5.15 5.15.0.1115.118
linux-image-aws-64k-5.15 5.15.0.1115.118
linux-image-aws-64k-lts-22.04 5.15.0.1115.118
linux-image-aws-fips 5.15.0.1115.111
Available with Ubuntu Pro
linux-image-aws-fips-5.15 5.15.0.1115.111
Available with Ubuntu Pro
linux-image-aws-lts-22.04 5.15.0.1115.118
linux-image-nvidia-tegra-igx 5.15.0.1056.58
linux-image-nvidia-tegra-igx-5.15 5.15.0.1056.58
linux-image-nvidia-tegra-igx-rt 5.15.0.1056.58
linux-image-nvidia-tegra-igx-rt-5.15 5.15.0.1056.58

Ubuntu 20.04 LTS
linux-image-5.15.0-1115-aws 5.15.0-1115.122~20.04.1
Available with Ubuntu Pro
linux-image-aws 5.15.0.1115.122~20.04.1
Available with Ubuntu Pro
linux-image-aws-5.15 5.15.0.1115.122~20.04.1
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-8730-5
https://ubuntu.com/security/notices/USN-8730-4
https://ubuntu.com/security/notices/USN-8730-3
https://ubuntu.com/security/notices/USN-8730-2
https://ubuntu.com/security/notices/USN-8730-1
CVE-2026-53131

Package Information:
https://launchpad.net/ubuntu/+source/linux-aws/5.15.0-1115.122
https://launchpad.net/ubuntu/+source/linux-aws-fips/5.15.0-1115.122+fips1
https://launchpad.net/ubuntu/+source/linux-nvidia-tegra-igx/5.15.0-1056.56

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