Ubuntu 20.04 LTS, USN-7173-1: Critical Kernel Fixes for DoS Threats

ubuntu

December 17, 2024

Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux: Linux kernel

- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems

- linux-kvm: Linux kernel for cloud environments

- linux-raspi: Linux kernel for Raspberry Pi systems

- linux-gcp-5.4: Linux kernel for Google Cloud Platform (GCP) systems

- linux-hwe-5.4: Linux hardware enablement (HWE) kernel

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:

- GPU drivers;

- Network drivers;

- SCSI subsystem;

- Ext4 file system;

- Bluetooth subsystem;

- Memory...

Read the Full Advisory

Topics Covered

security advisory denial of service Ubuntu kernel system update Linux patch driver exploit

Update Instructions

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

Ubuntu 20.04 LTS
   linux-image-5.4.0-1121-raspi    5.4.0-1121.133
   linux-image-5.4.0-1125-kvm      5.4.0-1125.133
   linux-image-5.4.0-1141-gcp      5.4.0-1141.150
   linux-image-5.4.0-204-generic   5.4.0-204.224
   linux-image-5.4.0-204-generic-lpae  5.4.0-204.224
   linux-image-5.4.0-204-lowlatency  5.4.0-204.224
   linux-image-gcp-lts-20.04       5.4.0.1141.143
   linux-image-generic             5.4.0.204.200
   linux-image-generic-lpae        5.4.0.204.200
   linux-image-kvm                 5.4.0.1125.121
   linux-image-lowlatency          5.4.0.204.200
   linux-image-oem                 5.4.0.204.200
   linux-image-oem-osp1            5.4.0.204.200
   linux-image-raspi               5.4.0.1121.151
   linux-image-raspi2              5.4.0.1121.151
   linux-image-virtual             5.4.0.204.200

Ubuntu 18.04 LTS
   linux-image-5.4.0-1141-gcp      5.4.0-1141.150~18.04.1
                                   Available with Ubuntu Pro
   linux-image-5.4.0-204-generic   5.4.0-204.224~18.04.1
                                   Available with Ubuntu Pro
   linux-image-5.4.0-204-lowlatency  5.4.0-204.224~18.04.1
                                   Available with Ubuntu Pro
   linux-image-gcp                 5.4.0.1141.150~18.04.1
                                   Available with Ubuntu Pro
   linux-image-generic-hwe-18.04   5.4.0.204.224~18.04.1
                                   Available with Ubuntu Pro
   linux-image-lowlatency-hwe-18.04  5.4.0.204.224~18.04.1
                                   Available with Ubuntu Pro
   linux-image-oem                 5.4.0.204.224~18.04.1
                                   Available with Ubuntu Pro
   linux-image-oem-osp1            5.4.0.204.224~18.04.1
                                   Available with Ubuntu Pro
   linux-image-snapdragon-hwe-18.04  5.4.0.204.224~18.04.1
                                   Available with Ubuntu Pro
   linux-image-virtual-hwe-18.04   5.4.0.204.224~18.04.1
                                   Available with Ubuntu Pro

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.