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Ubuntu 18.04 & 16.04: Linux Kernel Critical Security Update USN-7907-3

Several security issues were fixed in the Linux kernel.. ========================================================================== Ubuntu Security Notice USN-7907-3 December 04, 2025 linux-gcp, linux-gcp-4.15, linux-hwe vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux-gcp-4.15: Linux kernel for Google Cloud Platform (GCP) systems - linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems - linux-hwe: Linux hardware enablement (HWE) kernel Details: Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - Cryptographic API; - ACPI drivers; - Hardware monitoring drivers; - InfiniBand drivers; - Mailbox framework; - Network drivers; - AFS file system; - Ceph distributed file system; - Network file system (NFS) server daemon; - NILFS2 file system; - File systems infrastructure; - KVM subsystem; - L3 Master device support module; - Tracing infrastructure; - Memory management; - Appletalk network protocol; - Netfilter; - Open vSwitch; (CVE-2021-47385, CVE-2022-49026, CVE-2022-49390, CVE-2024-49935, CVE-2024-49963, CVE-2024-50067, CVE-2024-50095, CVE-2024-50179, CVE-2024-53090, CVE-2024-53112, CVE-2024-53217, CVE-2024-58083, CVE-2025-21715, CVE-2025-21722, CVE-2025-21761, CVE-2025-21791, CVE-2025-21811, CVE-2025-21855, CVE-2025-37958, CVE-2025-38666, CVE-2025-39964, CVE-2025-40018) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 18.04 LTS linux-image-4.15.0-1180-gcp 4.15.0-1180.197 Available with Ubuntu Pro linux-image-gcp-4.15 4.15.0.1180.193 Available with Ubuntu Pro linux-image-gcp-lts-18.04 4.15.0.1180.193 Available with Ubuntu Pro Ubuntu 16.04 LTS linux-image-4.15.0-1180-gcp 4.15.0-1180.197~16.04.1 Available with Ubuntu Pro linux-image-4.15.0-245-generic 4.15.0-245.257~16.04.1 Available with Ubuntu Pro linux-image-4.15.0-245-lowlatency 4.15.0-245.257~16.04.1 Available with Ubuntu Pro linux-image-gcp 4.15.0.1180.197~16.04.1 Available with Ubuntu Pro linux-image-generic-hwe-16.04 4.15.0.245.257~16.04.1 Available with Ubuntu Pro linux-image-gke 4.15.0.1180.197~16.04.1 Available with Ubuntu Pro linux-image-lowlatency-hwe-16.04 4.15.0.245.257~16.04.1 Available with Ubuntu Pro linux-image-oem 4.15.0.245.257~16.04.1 Available with Ubuntu Pro linux-image-virtual-hwe-16.04 4.15.0.245.257~16.04.1 Available with Ubuntu Pro After a standard system update you need to reboot your computer to make all the necessary changes. ATTENTION: Due to an unavoidable ABI change the kernel updates have been given a new version number, which requires you to recompile and reinstall all third party kernel modules you might have installed. Unless you manually uninstalled the standard kernel metapackages (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual, linux-powerpc), a standard system upgrade will automatically perform this as well. References: https://ubuntu.com/security/notices/USN-7907-3 https://ubuntu.com/security/notices/USN-7907-2 https://ubuntu.com/security/notices/USN-7907-1 CVE-2021-47385, CVE-2022-49026, CVE-2022-49390, CVE-2024-49935, CVE-2024-49963, CVE-2024-50067, CVE-2024-50095, CVE-2024-50179, CVE-2024-53090,CVE-2024-53112, CVE-2024-53217, CVE-2024-58083, CVE-2025-21715, CVE-2025-21722, CVE-2025-21761, CVE-2025-21791, CVE-2025-21811, CVE-2025-21855, CVE-2025-37958, CVE-2025-38666, CVE-2025-39964, CVE-2025-40018 . Address multiple security flaws in the Linux kernel affecting Ubuntu 16.04 and 18.04, critical system update instructions provided.. Linux Kernel Security, Ubuntu Update Guide, Ubuntu GCP Security, Critical Linux Issues. . Severity: Critical. LinuxSecurity.com Team

Dec 04, 2025 •Critical Ubuntu