Ubuntu Linux Kernel Security Advisory USN-8660-1 with CVE Fixes

Vulnerability Overview Vulnerability ID: USN-8660-1 Publication Date: August 20, 2026 Description: Multiple security issues were discovered in the Linux kernel that could be exploited by attackers to compromise the system. Impact Scope Affected Systems: - Linux Kernel - Defects exist in the following subsystems: - x86 architecture - InfiniBand driver - Network drivers - Network traffic control - IPv4 network - IPv6 network - Netfilter - Open vSwitch - RoRPC session sockets - SCTP protocol Remediation Update Instructions: - A system reboot is required after a standard system update to apply all necessary changes. - Due to inevitable ABI changes, the kernel updates have been assigned new version numbers, requiring all third-party kernel modules to be recompiled and reinstalled. - This action is performed automatically during a standard system upgrade unless the standard kernel meta-packages (such as linux-generic, linux-generic-lts, linux-virtual, linux-powerpc) are manually removed. Fixed Versions: - Ubuntu 26.04 LTS: - linux-image-7.0.0-1005-gke ~ 7.0.0-1005.6 - linux-image-7.0.0-1005-gke-64k ~ 7.0.0-1005.6 - linux-image-7.0.0-1010-gcp ~ 7.0.0-1010.10 - linux-image-7.0.0-1010-gcp-64k ~ 7.0.0-1010.10 - linux-image-gcp ~ 7.0.0-1010.10 - linux-image-gcp-64k ~ 7.0.0-1010.10 - linux-image-gcp-64k-7.0 ~ 7.0.0-1010.10 - linux-image-gcp-7.0 ~ 7.0.0-1010.10 - linux-image-gke ~ 7.0.0-1005.6 - linux-image-gke-64k ~ 7.0.0-1005.6 - linux-image-gke-64k-7.0 ~ 7.0.0-1005.6 - linux-image-gke-64k-hwe-26.04 ~ 7.0.0-1005.6 - linux-image-gke-7.0 ~ 7.0.0-1005.6 - linux-image-gke-hwe-26.04 ~ 7.0.0-1005.6 References CVE-2026-64531 CVE-2026-53359 CVE-2026-53260 CVE-2026-53247 CVE-2026-53246 CVE-2026-53228 CVE-2026-53225 CVE-2026-53224 CVE-2026-53221 CVE-2026-53216 Related Advisories USN-8661-1 USN-8659-1 USN-8658-1 USN-8656-1 USN-8646-1 USN-8645-1 USN-8644-1 USN-8644-2 USN-8643-1 USN-8643-2 Risk Reduction Ubuntu Pro provides ten years of security coverage for over 25,000 packages in the Main and Universe repositories, free for up to five machines. Additional Information For more references, click "Show 9 more references" and "Show 17 more references". Contact For further questions, contact team members. Footer Information Contains installation and support links for products such as OpenStack, Ceph, and Kubernetes. Provides feature and documentation links for products such as Ubuntu Core, Ubuntu Desktop, and Ubuntu Server. Provides detailed information on Cloud, Security, Landscape, Containers, Downloads, Support, Pricing, Solutions, and Sectors. Provides links for Contact us, About us, Community, Careers, Blog, Resources, and Press center. Provides links for Legal information, Data privacy, Manage your tracker settings, and Report a bug on this site. Copyright Information © 2026 Canonical Ltd. Ubuntu and Canonical are trademarks of Canonical Ltd.

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Ubuntu Linux Kernel Security Advisory USN-8660-1 with CVE Fixes

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