USN-7937-1: Linux kernel (Azure FIPS) vulnerabilities

USN-7937-1: Linux kernel (Azure FIPS) vulnerabilities

https://ubuntu.com/security/notices/rss.xml / Tue, 12/16/2025 - 01:53
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: - Cryptographic API; - ACPI drivers; - DMA engine subsystem; - GPU drivers; - HSI subsystem; - Hardware monitoring drivers; - InfiniBand drivers; - Mailbox framework; - Network drivers; - Ethernet team driver; - AFS file system; - Ceph distributed file system; - Ext4 file system; - Network file system (NFS) server daemon; - NILFS2 file system; - File systems infrastructure; - KVM subsystem; - L3 Master device support module; - Timer subsystem; - Tracing infrastructure; - Memory management; - Appletalk network protocol; - DCCP (Datagram Congestion Control Protocol); - IPv6 networking; - Netfilter; - NET/ROM layer; - Open vSwitch; - SCTP protocol; - USB sound devices; (CVE-2021-47385, CVE-2022-49026, CVE-2022-49390, CVE-2023-52574, CVE-2023-52650, CVE-2024-41006, CVE-2024-49935, CVE-2024-49963, CVE-2024-50006, CVE-2024-50067, CVE-2024-50095, CVE-2024-50179, CVE-2024-50299, CVE-2024-53090, CVE-2024-53112, CVE-2024-53124, CVE-2024-53150, CVE-2024-53217, CVE-2024-56767, CVE-2024-58083, CVE-2025-21715, CVE-2025-21722, CVE-2025-21761, CVE-2025-21791, CVE-2025-21811, CVE-2025-21855, CVE-2025-37838, CVE-2025-37958, CVE-2025-38352, CVE-2025-38666, CVE-2025-39964, CVE-2025-40018)

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Kenya Education Network CERT(KENET-CERT) is a Cybersecurity Emergency Response Team and Co-ordination Center operated by the National Research and Education Network of Kenya. KENET-CERT coordination center promotes awareness on cybersecurity incidences as well as coordinates and assists member institutions in responding effectively to cyber security threats and incidences. KENET-CERT works closely with Kenya's National CIRT coordination center (CIRT/CC) as a sector CIRT for the academic institutions. KENET promotes use of ICT in Teaching, Learning and Research in Higher Education Institutions in Kenya. KENET aims to interconnect all the Universities, Tertiary and Research Institutions in Kenya by setting up a cost effective and sustainable private network with high speed access to the global Internet. KENET also facilitates electronic communication among students and faculties in member institutions, share learning and teaching resources by collaboration in Research and Development of Educational content.