==========================================================================
Ubuntu Security Notice USN-7940-2
January 09, 2026

linux-azure-nvidia vulnerabilities
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 24.04 LTS

Summary:

Several security issues were fixed in the Linux kernel.

Software Description:
- linux-azure-nvidia: Linux kernel for Microsoft Azure Cloud systems, N-Series

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:
   - ARM64 architecture;
   - PowerPC architecture;
   - x86 architecture;
   - Cryptographic API;
   - ACPI drivers;
   - Ublk userspace block driver;
   - Clock framework and drivers;
   - EDAC drivers;
   - GPU drivers;
   - HSI subsystem;
   - IIO subsystem;
   - InfiniBand drivers;
   - Media drivers;
   - MemoryStick subsystem;
   - Network drivers;
   - NTB driver;
   - PCI subsystem;
   - Remote Processor subsystem;
   - Thermal drivers;
   - Virtio Host (VHOST) subsystem;
   - 9P distributed file system;
   - File systems infrastructure;
   - JFS file system;
   - Network file system (NFS) server daemon;
   - NTFS3 file system;
   - SMB network file system;
   - Memory management;
   - Bluetooth subsystem;
   - RDMA verbs API;
   - Kernel fork() syscall;
   - Timer subsystem;
   - Tracing infrastructure;
   - Watch queue notification mechanism;
   - Appletalk network protocol;
   - Asynchronous Transfer Mode (ATM) subsystem;
   - Networking core;
   - IPv4 networking;
   - IPv6 networking;
   - Netfilter;
   - Network traffic control;
   - SCTP protocol;
   - TLS protocol;
   - SoC Audio for Freescale CPUs drivers;
(CVE-2023-53034, CVE-2024-58092, CVE-2025-21729, CVE-2025-22018,
CVE-2025-22019, CVE-2025-22020, CVE-2025-22021, CVE-2025-22025,
CVE-2025-22027, CVE-2025-22028, CVE-2025-22033, CVE-2025-22035,
CVE-2025-22036, CVE-2025-22038, CVE-2025-22039, CVE-2025-22040,
CVE-2025-22041, CVE-2025-22042, CVE-2025-22044, CVE-2025-22045,
CVE-2025-22047, CVE-2025-22050, CVE-2025-22053, CVE-2025-22054,
CVE-2025-22055, CVE-2025-22056, CVE-2025-22057, CVE-2025-22058,
CVE-2025-22060, CVE-2025-22062, CVE-2025-22063, CVE-2025-22064,
CVE-2025-22065, CVE-2025-22066, CVE-2025-22068, CVE-2025-22070,
CVE-2025-22071, CVE-2025-22072, CVE-2025-22073, CVE-2025-22075,
CVE-2025-22079, CVE-2025-22080, CVE-2025-22081, CVE-2025-22083,
CVE-2025-22086, CVE-2025-22089, CVE-2025-22090, CVE-2025-22095,
CVE-2025-22097, CVE-2025-23136, CVE-2025-23138, CVE-2025-37838,
CVE-2025-37937, CVE-2025-37958, CVE-2025-38118, CVE-2025-38152,
CVE-2025-38227, CVE-2025-38240, CVE-2025-38352, CVE-2025-38575,
CVE-2025-38616, CVE-2025-38637, CVE-2025-38666, CVE-2025-38678,
CVE-2025-39682, CVE-2025-39728, CVE-2025-39735, CVE-2025-39964,
CVE-2025-39993, CVE-2025-40018, CVE-2025-40114, CVE-2025-40157)

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 24.04 LTS
   linux-image-6.8.0-1029-azure-nvidia  6.8.0-1029.32
   linux-image-azure-nvidia-6.8    6.8.0-1029.32
   linux-image-azure-nvidia-lts-24.04  6.8.0-1029.32

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-7940-2
   https://ubuntu.com/security/notices/USN-7940-1
   CVE-2023-53034, CVE-2024-58092, CVE-2025-21729, CVE-2025-22018,
   CVE-2025-22019, CVE-2025-22020, CVE-2025-22021, CVE-2025-22025,
   CVE-2025-22027, CVE-2025-22028, CVE-2025-22033, CVE-2025-22035,
   CVE-2025-22036, CVE-2025-22038, CVE-2025-22039, CVE-2025-22040,
   CVE-2025-22041, CVE-2025-22042, CVE-2025-22044, CVE-2025-22045,
   CVE-2025-22047, CVE-2025-22050, CVE-2025-22053, CVE-2025-22054,
   CVE-2025-22055, CVE-2025-22056, CVE-2025-22057, CVE-2025-22058,
   CVE-2025-22060, CVE-2025-22062, CVE-2025-22063, CVE-2025-22064,
   CVE-2025-22065, CVE-2025-22066, CVE-2025-22068, CVE-2025-22070,
   CVE-2025-22071, CVE-2025-22072, CVE-2025-22073, CVE-2025-22075,
   CVE-2025-22079, CVE-2025-22080, CVE-2025-22081, CVE-2025-22083,
   CVE-2025-22086, CVE-2025-22089, CVE-2025-22090, CVE-2025-22095,
   CVE-2025-22097, CVE-2025-23136, CVE-2025-23138, CVE-2025-37838,
   CVE-2025-37937, CVE-2025-37958, CVE-2025-38118, CVE-2025-38152,
   CVE-2025-38227, CVE-2025-38240, CVE-2025-38352, CVE-2025-38575,
   CVE-2025-38616, CVE-2025-38637, CVE-2025-38666, CVE-2025-38678,
   CVE-2025-39682, CVE-2025-39728, CVE-2025-39735, CVE-2025-39964,
   CVE-2025-39993, CVE-2025-40018, CVE-2025-40114, CVE-2025-40157,
   CVE-2025-40300

Package Information:
   https://launchpad.net/ubuntu/+source/linux-azure-nvidia/6.8.0-1029.32