Ubuntu USN-8370-1: Linux Kernel Privilege Escalation Fix

Vulnerability Overview Vulnerability ID: USN-8370-1 Publication Date: 2 June 2026 Description: The Linux kernel contains several security vulnerabilities when handling shared page fragments, including Dirty Frag, Fragnesia, and others. These vulnerabilities may lead to privilege escalation or container escape. Affected Systems Impacted Systems: - Linux Kernel - Linux Kernel for Amazon Web Services (AWS) systems - Linux Kernel for Google Cloud Platform (GCP) systems - Linux Kernel for IBM Cloud systems - Linux Kernel for NVIDIA systems - Linux Kernel for Oracle Cloud systems - Linux Kernel for Raspberry Pi systems - Linux Kernel for Real-time systems Remediation Update Instructions: - A system restart is required to apply all necessary changes. - Due to ABI changes, all third-party kernel modules may need to be recompiled and reinstalled. - After manually removing standard kernel meta-packages (such as , , , ), the standard system upgrade will automatically perform this action. Specific Versions: - 26.04 LTS (Resolute) - linux-image-7.0.0-1005-gcp – 7.0.0-1005.5 - linux-image-7.0.0-1005-gcp-64k – 7.0.0-1005.5 - linux-image-7.0.0-1005-oracle – 7.0.0-1005.5 - linux-image-7.0.0-1005-oracle-64k – 7.0.0-1005.5 - linux-image-7.0.0-1006-aws – 7.0.0-1006.6 - linux-image-7.0.0-1006-aws-64k – 7.0.0-1006.6 - linux-image-7.0.0-1007-ibm – 7.0.0-1007.7 - linux-image-7.0.0-1009-nvidia – 7.0.0-1009.9 - linux-image-7.0.0-1009-nvidia-64k – 7.0.0-1009.9 - linux-image-7.0.0-1011-raspi – 7.0.0-1011.11 - linux-image-7.0.0-1011-raspi-realtime – 7.0.0-1011.11 - linux-image-7.0.0-22-generic – 7.0.0-22.22 - linux-image-7.0.0-22-generic-64k – 7.0.0-22.22 - linux-image-7.0.0-22-realtime – 7.0.0-22.22.1 - linux-image-7.0.0-22-realtime-64k – 7.0.0-22.22.1 - linux-image-aws – 7.0.0-1006.6 - linux-image-aws-64k – 7.0.0-1006.6 - linux-image-aws-64k-7.0 – 7.0.0-1006.6 - linux-image-aws-7.0 – 7.0.0-1006.6 - linux-image-gcp – 7.0.0-1005.5 - linux-image-gcp-64k – 7.0.0-1005.5 - linux-image-gcp-64k-7.0 – 7.0.0-1005.5 - linux-image-gcp-7.0 – 7.0.0-1005.5 - linux-image-generic – 7.0.0-22.22 - linux-image-generic-64k – 7.0.0-22.22 - linux-image-generic-64k-7.0 – 7.0.0-22.22 - linux-image-generic-64k-hwe-26.04 – 7.0.0-22.22 - linux-image-generic-7.0 – 7.0.0-22.22 - linux-image-generic-hwe-26.04 – 7.0.0-22.22 - linux-image-ibm – 7.0.0-1007.7 - linux-image-ibm-7.0 – 7.0.0-1007.7 - linux-image-nvidia – 7.0.0-1009.9 - linux-image-nvidia-64k – 7.0.0-1009.9 - linux-image-nvidia-64k-7.0 – 7.0.0-1009.9 - linux-image-nvidia-7.0 – 7.0.0-1009.9 - linux-image-oracle – 7.0.0-1005.5 - linux-image-oracle-64k – 7.0.0-1005.5 - linux-image-oracle-64k-7.0 – 7.0.0-1005.5 - linux-image-oracle-7.0 – 7.0.0-1005.5 - linux-image-raspi – 7.0.0-1011.11 - linux-image-raspi-7.0 – 7.0.0-1011.11 - linux-image-raspi-realtime – 7.0.0-1011.11 - linux-image-raspi-realtime-7.0 – 7.0.0-1011.11 - linux-image-realtime – 7.0.0-22.22.1 - linux-image-realtime-64k – 7.0.0-22.22.1 - linux-image-realtime-64k-7.0 – 7.0.0-22.22.1 - linux-image-realtime-7.0 – 7.0.0-22.22.1 - linux-image-realtime-hwe-26.04 – 7.0.0-22.22.1 - linux-image-virtual – 7.0.0-22.22 - linux-image-virtual-7.0 – 7.0.0-22.22 - linux-image-virtual-hwe-26.04 – 7.0.0-22.22 References CVE-2026-47337 CVE-2026-47334 CVE-2026-47333 CVE-2026-47332 CVE-2026-47330 CVE-2026-47329 CVE-2026-47328 CVE-2026-47327 CVE-2026-47326 CVE-2026-46333 Related Notices USN-8371-1 Additional Information Reducing Security Exposure: Ubuntu Pro provides ten years of security coverage for packages in the Main and Universe repositories (over 25,000 packages), supporting up to five machines. Contact Team: For further questions, please contact the team members.

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Ubuntu USN-8370-1: Linux Kernel Privilege Escalation Fix

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