1. Ubuntu Security Notices
  2. USN-7594-2

USN-7594-2: Linux kernel (Azure) vulnerabilities

Publication date

26 June 2025

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

  • linux-azure - Linux kernel for Microsoft Azure Cloud systems

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:

  • ARM32 architecture;
  • ARM64 architecture;
  • PowerPC architecture;
  • RISC-V architecture;
  • User-Mode Linux (UML);
  • x86 architecture;
  • Block layer subsystem;
  • Cryptographic API;
  • Compute Acceleration Framework;
  • ACPI drivers;
  • Serial ATA and Parallel ATA drivers;
  • Drivers core;
  • Ublk userspace block driver;
  • Bluetooth drivers;
  • Bus devices;
  • TPM device driver;
  • Clock framework and drivers;
  • CPU frequency scaling framework;
  • Buffer Sharing and Synchronization framework;
  • DMA engine subsystem;
  • GPU drivers;
  • HID subsystem;
  • HSI subsystem;
  • I2C subsystem;
  • I3C subsystem;
  • IIO...

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:

  • ARM32 architecture;
  • ARM64 architecture;
  • PowerPC architecture;
  • RISC-V architecture;
  • User-Mode Linux (UML);
  • x86 architecture;
  • Block layer subsystem;
  • Cryptographic API;
  • Compute Acceleration Framework;
  • ACPI drivers;
  • Serial ATA and Parallel ATA drivers;
  • Drivers core;
  • Ublk userspace block driver;
  • Bluetooth drivers;
  • Bus devices;
  • TPM device driver;
  • Clock framework and drivers;
  • CPU frequency scaling framework;
  • Buffer Sharing and Synchronization framework;
  • DMA engine subsystem;
  • GPU drivers;
  • HID subsystem;
  • HSI subsystem;
  • I2C subsystem;
  • I3C subsystem;
  • IIO subsystem;
  • InfiniBand drivers;
  • IOMMU subsystem;
  • IRQ chip drivers;
  • MCB driver;
  • Multiple devices driver;
  • Media drivers;
  • MemoryStick subsystem;
  • Multifunction device drivers;
  • Microchip PCI driver;
  • Intel Management Engine Interface driver;
  • PCI Endpoint Test driver;
  • MTD block device drivers;
  • Network drivers;
  • Ethernet bonding driver;
  • Mellanox network drivers;
  • STMicroelectronics network drivers;
  • NTB driver;
  • NVME drivers;
  • PCI subsystem;
  • Synopsys DesignWare PCIe PMU;
  • Mellanox platform drivers;
  • PWM drivers;
  • Remote Processor subsystem;
  • S/390 drivers;
  • SCSI subsystem;
  • Samsung SoC drivers;
  • SPI subsystem;
  • GPIB drivers;
  • VideoCore services drivers;
  • Thermal drivers;
  • TTY drivers;
  • UFS subsystem;
  • Cadence USB3 driver;
  • ChipIdea USB driver;
  • USB Device Class drivers;
  • DesignWare USB3 driver;
  • USB Gadget drivers;
  • USB Host Controller drivers;
  • USB Type-C support driver;
  • Virtio Host (VHOST) subsystem;
  • Backlight driver;
  • Framebuffer layer;
  • W1 Dallas's 1-wire bus driver;
  • 9P distributed file system;
  • File systems infrastructure;
  • BTRFS file system;
  • Ext4 file system;
  • F2FS file system;
  • JFS file system;
  • Network file systems library;
  • Network file system (NFS) server daemon;
  • NTFS3 file system;
  • Overlay file system;
  • SMB network file system;
  • Ethernet bridge;
  • io_uring subsystem;
  • Perf events;
  • Memory management;
  • UProbes tracing;
  • Amateur Radio drivers;
  • SCTP protocol;
  • Network sockets;
  • RDMA verbs API;
  • BPF subsystem;
  • Kernel fork() syscall;
  • Hibernation control;
  • Scheduler infrastructure;
  • Tracing infrastructure;
  • Watch queue notification mechanism;
  • Vector I/O iterator library;
  • 802.1Q VLAN protocol;
  • 9P file system network protocol;
  • Asynchronous Transfer Mode (ATM) subsystem;
  • Networking core;
  • Distributed Switch Architecture;
  • Ethtool driver;
  • IPv4 networking;
  • IPv6 networking;
  • MAC80211 subsystem;
  • Management Component Transport Protocol (MCTP);
  • Multipath TCP;
  • Netfilter;
  • Open vSwitch;
  • Network traffic control;
  • TIPC protocol;
  • TLS protocol;
  • Wireless networking;
  • ALSA framework;
  • WCD audio codecs;
  • SoC Audio for Freescale CPUs drivers;
  • SoC Audio generic drivers;
  • Intel ASoC drivers;
  • QCOM ASoC drivers;
  • Virtio sound driver;
  • CPU Power monitoring subsystem

Update instructions

After a standard system update you need to reboot your computer to make all the necessary changes.

Learn more about how to get the fixes.

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.

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

Ubuntu Release Package Version
25.04 plucky linux-image-6.14.0-1007-azure –  6.14.0-1007.7
linux-image-6.14.0-1007-azure-fde –  6.14.0-1007.7
linux-image-azure –  6.14.0-1007.7
linux-image-azure-fde –  6.14.0-1007.7

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References

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