1. Ubuntu Security Notices
  2. USN-7770-1

USN-7770-1: Linux kernel (Azure) vulnerabilities

Publication date

24 September 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:

  • ARM64 architecture;
  • PowerPC architecture;
  • x86 architecture;
  • Block layer subsystem;
  • Cryptographic API;
  • ACPI drivers;
  • Android drivers;
  • Bluetooth drivers;
  • Bus devices;
  • Clock framework and drivers;
  • CPU frequency scaling framework;
  • Hardware crypto device drivers;
  • DMA engine subsystem;
  • EDAC drivers;
  • Arm Firmware Framework for ARMv8-A(FFA);
  • FPGA Framework;
  • GPIO subsystem;
  • GPU drivers;
  • HID subsystem;
  • Hardware monitoring drivers;
  • HW tracing;
  • InfiniBand drivers;
  • IOMMU subsystem;
  • Multiple devices driver;
  • Media drivers;
  • VMware VMCI Driver;
  • MTD block device...

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;
  • Block layer subsystem;
  • Cryptographic API;
  • ACPI drivers;
  • Android drivers;
  • Bluetooth drivers;
  • Bus devices;
  • Clock framework and drivers;
  • CPU frequency scaling framework;
  • Hardware crypto device drivers;
  • DMA engine subsystem;
  • EDAC drivers;
  • Arm Firmware Framework for ARMv8-A(FFA);
  • FPGA Framework;
  • GPIO subsystem;
  • GPU drivers;
  • HID subsystem;
  • Hardware monitoring drivers;
  • HW tracing;
  • InfiniBand drivers;
  • IOMMU subsystem;
  • Multiple devices driver;
  • Media drivers;
  • VMware VMCI Driver;
  • MTD block device drivers;
  • Network drivers;
  • Mellanox network drivers;
  • STMicroelectronics network drivers;
  • NVDIMM (Non-Volatile Memory Device) drivers;
  • NVME drivers;
  • NVMEM (Non Volatile Memory) drivers;
  • PCI subsystem;
  • Amlogic Meson DDR PMU;
  • NI-700 PMU driver;
  • PHY drivers;
  • Pin controllers subsystem;
  • x86 platform drivers;
  • PTP clock framework;
  • SCSI subsystem;
  • ASPEED SoC drivers;
  • SPI subsystem;
  • TCM subsystem;
  • Thunderbolt and USB4 drivers;
  • TTY drivers;
  • UFS subsystem;
  • USB core drivers;
  • USB Gadget drivers;
  • Renesas USBHS Controller drivers;
  • USB Type-C Port Controller Manager driver;
  • VFIO drivers;
  • Virtio Host (VHOST) subsystem;
  • Backlight driver;
  • Framebuffer layer;
  • Virtio drivers;
  • BTRFS file system;
  • EROFS file system;
  • F2FS file system;
  • File systems infrastructure;
  • Network file systems library;
  • NTFS3 file system;
  • SMB network file system;
  • Codetag library;
  • BPF subsystem;
  • LZO compression library;
  • Mellanox drivers;
  • IPv4 networking;
  • Bluetooth subsystem;
  • Network sockets;
  • XFRM subsystem;
  • Digital Audio (PCM) driver;
  • Tracing infrastructure;
  • io_uring subsystem;
  • Padata parallel execution mechanism;
  • DVFS energy model driver;
  • Restartable seuqences system call mechanism;
  • Timer subsystem;
  • Memory management;
  • KASAN memory debugging framework;
  • CAN network layer;
  • Networking core;
  • IPv6 networking;
  • Netfilter;
  • NetLabel subsystem;
  • Open vSwitch;
  • Network traffic control;
  • TIPC protocol;
  • TLS protocol;
  • ALSA framework;
  • sma1307 audio codecs;
  • Intel ASoC drivers;
  • MediaTek ASoC drivers;
  • USB sound devices

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-6.14.0-1012-azure –  6.14.0-1012.12
linux-image-azure –  6.14.0-1012.12
linux-image-azure-6.14 –  6.14.0-1012.12

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References

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