Security Advisory Desk
unratedQCS priority 70/100Ubuntu

USN-8729-2: Linux kernel (Raspberry Pi Real-time) vulnerabilities

Multiple security vulnerabilities were found in the Linux kernel used by Raspberry Pi real-time systems, which could let attackers harm the system. These issues affect many core parts of the kernel, including hardware drivers and networking components. Updating to the latest kernel version fixes these problems and protects devices from potential attacks.

Published 18/9/2026, 8:45:38 amVerified 19/9/2026, 6:55:33 pmRevision 1
Ubuntu unrated network security advisory visual

In plain language

What this advisory means

Multiple security vulnerabilities were found in the Linux kernel used by Raspberry Pi real-time systems, which could let attackers harm the system. These issues affect many core parts of the kernel, including hardware drivers and networking components. Updating to the latest kernel version fixes these problems and protects devices from potential attacks.

Technical explanation

How the issue affects the environment

The Linux kernel for Raspberry Pi real-time systems contained multiple security flaws across diverse subsystems such as ARM architectures (ARM32, ARM64), the PowerPC architecture, various drivers (e.g., Bluetooth, GPU, network), networking protocols (IPv4, IPv6, Multipath TCP), file systems (NTFS3, SMB), kernel security modules, and tracing infrastructures like KProbes and io_uring. Exploiting these vulnerabilities could lead to system compromise. Ubuntu issued an update to linux-image-raspi-realtime package version 6.8.0-2053.55 addressing these flaws. Due to an ABI change, all third-party kernel modules must be recompiled and reinstalled after upgrading. A system reboot is required to apply the update fully.

Operational impact

Why teams should care

If unpatched, these widespread kernel vulnerabilities present a significant risk, potentially allowing attackers to gain unauthorized access or control, disrupt services, or compromise data on systems running the affected Linux kernel, including Raspberry Pi real-time systems and Microsoft Azure cloud environments. This can lead to operational interruptions and damage to business reputation. Prompt updates mitigate this risk and maintain system integrity.

Immediate action

Update the Linux kernel package to linux-image-raspi-realtime version 6.8.0-2053.55 and reboot the system. Additionally, recompile and reinstall all third-party kernel modules due to ABI changes.

Affected and fixed releases

Affected versionsConfirm in the official vendor advisory
Fixed versionslinux-image-raspi-realtime version 6.8.0-2053.55

Temporary risk reduction

No separate workaround was supplied in the source feed. Use the official vendor advisory before changing production controls.

Evidence and validation checklist

  • Official Ubuntu Security Notice USN-8729-2 confirming multiple Linux kernel security issues
  • List of affected kernel subsystems and components
  • Instruction to update to kernel version 6.8.0-2053.55
  • Recommendation to reboot and recompile third-party kernel modules
  • Published CVE identifiers associated with the issues

Authoritative reference

Ubuntu Security Notices

QCS detected and normalized this record from the official source. Vendor guidance remains authoritative.

Open source
USN-8729-2: Linux kernel (Raspberry Pi | Advisory | QCS