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Ubuntu 16.04 LTS USN-7875-1 Linux Kernel Critical VMSCAPE Threat

Several security issues were fixed in the Linux kernel.. ========================================================================== Ubuntu Security Notice USN-7875-1 November 19, 2025 linux-oracle vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 16.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux-oracle: Linux kernel for Oracle Cloud systems Details: Jean-Claude Graf, Sandro Rüegge, Ali Hajiabadi, and Kaveh Razavi discovered that the Linux kernel contained insufficient branch predictor isolation between a guest and a userspace hypervisor for certain processors. This flaw is known as VMSCAPE. An attacker in a guest VM could possibly use this to expose sensitive information from the host OS. (CVE-2025-40300) 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: - DMA engine subsystem; - GPU drivers; - HSI subsystem; - Media drivers; - Ethernet team driver; - SPI subsystem; - USB core drivers; - Framebuffer layer; - BTRFS file system; - Ext4 file system; - Network file system (NFS) server daemon; - NILFS2 file system; - Timer subsystem; - DCCP (Datagram Congestion Control Protocol); - IPv6 networking; - NET/ROM layer; - Packet sockets; - Network traffic control; - SCTP protocol; - VMware vSockets driver; - USB sound devices; (CVE-2023-52477, CVE-2023-52574, CVE-2023-52650, CVE-2024-27074, CVE-2024-35849, CVE-2024-41006, CVE-2024-47685, CVE-2024-49924, CVE-2024-50006, CVE-2024-50051, CVE-2024-50202, CVE-2024-50299, CVE-2024-53124, CVE-2024-53130, CVE-2024-53131, CVE-2024-53150, CVE-2024-56767, CVE-2024-57996, CVE-2025-21796, CVE-2025-37752, CVE-2025-37785, CVE-2025-37838, CVE-2025-38350,CVE-2025-38352, CVE-2025-38477, CVE-2025-38617, CVE-2025-38618) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 16.04 LTS linux-image-4.15.0-1148-oracle 4.15.0-1148.159~16.04.1 Available with Ubuntu Pro linux-image-oracle 4.15.0.1148.159~16.04.1 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-7875-1 CVE-2023-52477, CVE-2023-52574, CVE-2023-52650, CVE-2024-27074, CVE-2024-35849, CVE-2024-41006, CVE-2024-47685, CVE-2024-49924, CVE-2024-50006, CVE-2024-50051, CVE-2024-50202, CVE-2024-50299, CVE-2024-53124, CVE-2024-53130, CVE-2024-53131, CVE-2024-53150, CVE-2024-56767, CVE-2024-57996, CVE-2025-21796, CVE-2025-37752, CVE-2025-37785, CVE-2025-37838, CVE-2025-38350, CVE-2025-38352, CVE-2025-38477, CVE-2025-38617, CVE-2025-38618, CVE-2025-40300 . Multiple vulnerabilities in the Linux kernel for Oracle systems require immediate updates to protect sensitive information.. Ubuntu Security, Oracle Linux, Linux Kernel Bugs. . Severity: Critical. LinuxSecurity.com Team

Nov 19, 2025 •Critical Ubuntu