Ubuntu USN-8667-1: Linux Kernel WiFi and Multi-Component Security Advisory

Vulnerability Overview Vulnerability ID: USN-8667-1 Publication Date: August 21, 2026 Description: Siebe Devroe, Héloïse Gollier, and Mathy Vanhoef discovered that the Linux kernel's WiFi implementation fails to handle aggregation frames correctly, causing issues in mesh networks due to an incorrect fix for CVE-2020-24588. An attacker with physical proximity can exploit this issue to inject packets (CVE-2023-27559). Additionally, several other security issues were found in the Linux kernel that an attacker could exploit to compromise the system. Affected Systems Affected Subsystems: - x86 architecture - Cryptographic API - InfiniBand drivers - Media drivers - NVIDIA Tegra memory controller drivers - Network drivers - NVMe drivers - Filesystem infrastructure - Ext4 filesystem - Network File System (NFS) server daemon - IPv4 networking - Network traffic control - TCP Remediation Update Notes: - A system restart is required after a standard system update to apply all necessary changes. - Due to inevitable ABI changes, the kernel update has been assigned a new version number, requiring all third-party kernel modules to be recompiled and reinstalled. This will be performed automatically during a standard system upgrade unless the standard kernel meta-packages (such as , , , ) are manually uninstalled. - Resolve the issue by updating the system to the following package versions: - Ubuntu 20.04 LTS Focal: - - 5.4.0-1149.158 (Ubuntu Pro) - - 5.4.0.1149.145 (Ubuntu Pro) - - 5.4.0.1149.145 (Ubuntu Pro) References CVE-2026-53359 CVE-2026-53228 CVE-2026-53212 CVE-2026-53176 CVE-2026-53088 CVE-2026-53045 CVE-2026-53006 CVE-2026-53002 CVE-2026-52999 CVE-2026-52993 Related Advisories USN-8666-1 USN-8665-1 USN-8664-1 USN-8663-1 USN-8662-2 USN-8662-1 USN-8661-1 USN-8660-1 USN-8656-1 USN-8646-1 Risk Mitigation Ubuntu Pro provides ten years of security coverage covering more than 25,000 packages in the Main and Universe repositories, and is free for use on up to five machines. Contact For further questions, please contact the team member. Footer Information Contains installation and support information for products such as OpenStack, Ceph, and Kubernetes. Provides information related to products such as Ubuntu Core, Ubuntu Desktop, and Ubuntu Server. Provides detailed information for categories such as Cloud, Security, Landscape, Containers, Downloads, Support, Pricing, Solutions, and Sectors. Provides links to Contact us, About us, Community, Careers, Blog, Resources, and Press center. Provides links to Legal information, Data privacy, Manage your tracker settings, and Report a bug on this site.

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Ubuntu USN-8667-1: Linux Kernel WiFi and Multi-Component Security Advisory