[USN-8658-3] Linux kernel vulnerabilities

[Rodrigo Figueiredo Zaiden]

==========================================================================
Ubuntu Security Notice USN-8658-3
August 25, 2026

linux-azure, linux-azure-fde, linux-nvidia-tegra-igx vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 22.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-azure: Linux kernel for Microsoft Azure Cloud systems
- linux-azure-fde: Linux kernel for Microsoft Azure CVM cloud systems
- linux-nvidia-tegra-igx: Linux kernel for NVIDIA Tegra IGX 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:
   - Open vSwitch;
   - SCTP protocol;
(CVE-2026-53224, CVE-2026-53246, CVE-2026-64531)

Update instructions:

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

Ubuntu 22.04 LTS
   linux-image-5.15.0-1055-nvidia-tegra-igx  5.15.0-1055.55
   linux-image-5.15.0-1055-nvidia-tegra-igx-rt  5.15.0-1055.55
   linux-image-5.15.0-1119-azure   5.15.0-1119.128
   linux-image-5.15.0-1119-azure-fde  5.15.0-1119.128
   linux-image-azure-5.15          5.15.0.1119.117
   linux-image-azure-fde-5.15      5.15.0.1119.128
   linux-image-azure-fde-lts-22.04  5.15.0.1119.128
   linux-image-azure-lts-22.04     5.15.0.1119.117
   linux-image-nvidia-tegra-igx    5.15.0.1055.57
   linux-image-nvidia-tegra-igx-5.15  5.15.0.1055.57
   linux-image-nvidia-tegra-igx-rt  5.15.0.1055.57
   linux-image-nvidia-tegra-igx-rt-5.15  5.15.0.1055.57

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-8658-3
   https://ubuntu.com/security/notices/USN-8658-2
   https://ubuntu.com/security/notices/USN-8658-1
   CVE-2026-53224, CVE-2026-53246, CVE-2026-64531

Package Information:
   https://launchpad.net/ubuntu/+source/linux-azure/5.15.0-1119.128
   https://launchpad.net/ubuntu/+source/linux-azure-fde/5.15.0-1119.128
   https://launchpad.net/ubuntu/+source/linux-nvidia-tegra-igx/5.15.0-1055.55

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