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[USN-8730-4] Linux kernel vulnerability

Posted on 21 September 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8730-4
September 21, 2026

linux-azure-fde, linux-intel-iotg, linux-kvm, linux-oracle,
linux-xilinx-zynqmp vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.04 LTS

Summary:

A security issue was fixed in the Linux kernel.

Software Description:
- linux-azure-fde: Linux kernel for Microsoft Azure CVM cloud systems
- linux-intel-iotg: Linux kernel for Intel IoT platforms
- linux-kvm: Linux kernel for cloud environments
- linux-oracle: Linux kernel for Oracle Cloud systems
- linux-xilinx-zynqmp: Linux kernel for Xilinx ZynqMP processors

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-5.15.0-1078-xilinx-zynqmp 5.15.0-1078.82
linux-image-5.15.0-1107-kvm 5.15.0-1107.112
linux-image-5.15.0-1110-intel-iotg 5.15.0-1110.116
linux-image-5.15.0-1112-oracle 5.15.0-1112.118
linux-image-5.15.0-1120-azure-fde 5.15.0-1120.129
linux-image-azure-fde-5.15 5.15.0.1120.129
linux-image-azure-fde-lts-22.04 5.15.0.1120.129
linux-image-intel-iotg 5.15.0.1110.109
linux-image-intel-iotg-5.15 5.15.0.1110.109
linux-image-kvm 5.15.0.1107.103
linux-image-kvm-5.15 5.15.0.1107.103
linux-image-oracle-5.15 5.15.0.1112.108
linux-image-oracle-lts-22.04 5.15.0.1112.108
linux-image-xilinx-zynqmp 5.15.0.1078.81
linux-image-xilinx-zynqmp-5.15 5.15.0.1078.81

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-8730-4
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-azure-fde/5.15.0-1120.129
https://launchpad.net/ubuntu/+source/linux-intel-iotg/5.15.0-1110.116
https://launchpad.net/ubuntu/+source/linux-kvm/5.15.0-1107.112
https://launchpad.net/ubuntu/+source/linux-oracle/5.15.0-1112.118
https://launchpad.net/ubuntu/+source/linux-xilinx-zynqmp/5.15.0-1078.82

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