Linux Kernel and Protocol Buffers Security Updates for Ubuntu

As of September 2, 2025, Ubuntu has released multiple security updates aimed at addressing critical vulnerabilities in the Linux kernel and Protocol Buffers across various versions of Ubuntu, particularly targeting cloud environments such as Microsoft Azure and Amazon Web Services (AWS).

Key Updates:

1. Linux Kernel Vulnerabilities:
- Azure (USN-7712-2): Fixes several security vulnerabilities in the Linux kernel for Azure cloud systems, impacting Ubuntu 20.04 LTS.
- AWS (USN-7727-3): Updates related to vulnerabilities in the kernel for AWS systems, affecting Ubuntu 16.04 LTS.
- General Kernel Vulnerabilities (USN-7725-3 and USN-7726-4): Addressed vulnerabilities across various subsystems for Ubuntu 22.04 LTS and 24.04 LTS, including networking and file system components.

2. Protocol Buffers Vulnerabilities (USN-7629-2):
- Affected releases: Ubuntu 20.04 LTS, 18.04 LTS, and 16.04 LTS.
- These updates resolve issues where specially crafted inputs could potentially lead to crashes or denial of service.

Update Details:

- Kernel Updates: Users are advised to update to the latest kernel versions, which include important patches for vulnerabilities that could be exploited by attackers. Post-update, a system reboot is required for changes to take effect. Users are also cautioned that due to ABI changes, third-party kernel modules may need recompilation.

- Protocol Buffers Update: The update specifically addresses issues related to memory handling in Python and Java bindings of Protocol Buffers. Users are encouraged to update their libraries to the specified versions to avoid potential service interruptions.

Recommendations:

- For Azure Users: Update to `linux-image-5.15.0-1094-azure`.
- For AWS Users: Update to `linux-image-4.4.0-1185-aws`.
- For Protocol Buffers: Update to the latest available versions of `libprotobuf-java` and `python3-protobuf`.

Conclusion:

Regular updates are crucial for maintaining system security, particularly in environments where sensitive data is processed. Users should ensure that their systems are updated promptly and monitor for any further advisories from Ubuntu regarding security vulnerabilities.

For more information on specific CVEs and to review the complete list of updates and affected packages, users can refer to the official Ubuntu security notices linked in the updates

Linux Kernel and Protocol Buffers updates for Ubuntu

Ubuntu Linux has released several updates to address security vulnerabilities. The updates include fixes for the Linux kernel, specifically for Azure and AWS versions, as well as general Linux kernel vulnerabilities. Additionally, Protocol Buffers have been patched to prevent potential issues.

[USN-7712-2] Linux kernel (Azure) vulnerabilities
[USN-7727-3] Linux kernel (AWS) vulnerabilities
[USN-7629-2] Protocol Buffers vulnerabilities
[USN-7725-3] Linux kernel vulnerabilities
[USN-7726-4] Linux kernel vulnerabilities

Linux Kernel and Protocol Buffers updates for Ubuntu @ Linux Compatible