1. Ubuntu Security Notices
  2. USN-7195-1

USN-7195-1: Linux kernel (Azure) vulnerabilities

Publication date

9 January 2025

Overview

Several security issues were fixed in the Linux kernel.

Releases

Packages

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

Details

Ziming Zhang discovered that the DRM driver for VMware Virtual GPU did not
properly handle certain error conditions, leading to a NULL pointer
dereference. A local attacker could possibly trigger this vulnerability to
cause a denial of service. (CVE-2022-38096)

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;
  • S390 architecture;
  • x86 architecture;
  • Power management core;
  • GPU drivers;
  • InfiniBand drivers;
  • Network drivers;
  • S/390 drivers;
  • SCSI subsystem;
  • TTY drivers;
  • BTRFS file system;
  • Ext4 file system;
  • EROFS file system;
  • F2FS file system;
  • File systems infrastructure;
  • BPF subsystem;
  • Socket...

Ziming Zhang discovered that the DRM driver for VMware Virtual GPU did not
properly handle certain error conditions, leading to a NULL pointer
dereference. A local attacker could possibly trigger this vulnerability to
cause a denial of service. (CVE-2022-38096)

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;
  • S390 architecture;
  • x86 architecture;
  • Power management core;
  • GPU drivers;
  • InfiniBand drivers;
  • Network drivers;
  • S/390 drivers;
  • SCSI subsystem;
  • TTY drivers;
  • BTRFS file system;
  • Ext4 file system;
  • EROFS file system;
  • F2FS file system;
  • File systems infrastructure;
  • BPF subsystem;
  • Socket messages infrastructure;
  • Bluetooth subsystem;
  • Memory management;
  • Amateur Radio drivers;
  • Ethernet bridge;
  • Networking core;
  • IPv4 networking;
  • Network traffic control;
  • Sun RPC protocol;
  • VMware vSockets driver;
  • SELinux security module

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
20.04 focal linux-image-5.4.0-1142-azure –  5.4.0-1142.149
linux-image-azure-lts-20.04 –  5.4.0.1142.136

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References

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