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

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)