Key Vulnerability Notices:
1. USN-7758-4: Affects the Oracle Cloud kernel, allowing system crashes or unauthorized execution of programs.
2. USN-7758-3: Pertains to the Real-time kernel, similarly allowing for system crashes or unauthorized program execution.
3. USN-7758-2: Impacts multiple systems including IBM and NVIDIA, with potential for system crashes or unauthorized access.
4. USN-7758-1: Covers a wide range of kernel versions across different cloud platforms, with similar risks.
Update Recommendations
Users are urged to update their systems to the latest kernel versions available on the Ubuntu website and to reboot their devices post-update to apply the changes effectively. The updates have introduced an ABI change, which necessitates recompiling and reinstalling any third-party kernel modules that users may have installed.Extended Recommendations
To mitigate potential risks associated with these vulnerabilities, users should:1. Regularly Update: Always keep the system updated with the latest security patches and kernel versions.
2. Review Third-Party Modules: Ensure that any third-party kernel modules are compatible with the new kernel version and recompile them as necessary.
3. Monitor Security Notices: Stay informed by regularly checking Ubuntu security notices and relevant forums for updates or additional vulnerabilities that may arise.
4. Implement Security Best Practices: Utilize firewalls, intrusion detection systems, and follow best practices for securing server configurations.
5. Backup Systems: Regularly back up critical data to prevent loss in case of a security breach or system failure.
By staying proactive and vigilant, users can help secure their systems against the potential exploitation of these vulnerabilities
Linux Kernel updates for Ubuntu Linux
A series of security vulnerabilities have been discovered in various Linux kernel versions, including Ubuntu 22.04 LTS and 24.04 LTS, affecting systems such as Oracle Cloud, Amazon Web Services (AWS), Google Cloud Platform (GCP), and Raspberry Pi. The vulnerabilities let attackers disrupt services or run unwanted code by taking advantage of a use-after-free issue in how AF_UNIX sockets handle memory cleanup. To resolve these issues, users are advised to update their system to the latest package versions, which can be found on the Ubuntu website, and reboot their computer after the update. Additionally, due to an ABI change, third-party kernel modules may need to be recompiled and reinstalled.
[USN-7758-4] Linux kernel (Oracle) vulnerability
[USN-7758-3] Linux kernel (Real-time) vulnerability
[USN-7758-2] Linux kernel vulnerability
[USN-7758-1] Linux kernel vulnerability
