Ubuntu 20.04 LTS: USN-6681-1 Critical: Multiple Kernel Flaws

ubuntu

March 7, 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-gkeop: Linux kernel for Google Container Engine (GKE) systems

- linux-iot: Linux kernel for IoT platforms

- 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:

Wenqing Liu discovered that the f2fs file system implementation in the

Linux kernel did not properly validate inode types while performing garbage

collection. An attacker could use this to construct a malicious f2fs image

that, when mounted and operated on, could cause a denial of service (system

crash). (CVE-2021-44879)

It was discovered that the DesignWare USB3 for Qualcomm SoCs driver in the

Linux kernel did not properly handle certain error cond...

Read the Full Advisory

Topics Covered

security advisory denial of service Ubuntu kernel out-of-bounds read error handling use-after-free

Update Instructions

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

Ubuntu 20.04 LTS:
   linux-image-5.4.0-1032-iot      5.4.0-1032.33
   linux-image-5.4.0-1087-gkeop    5.4.0-1087.91
   linux-image-5.4.0-1104-raspi    5.4.0-1104.116
   linux-image-5.4.0-1108-kvm      5.4.0-1108.115
   linux-image-5.4.0-1124-gcp      5.4.0-1124.133
   linux-image-5.4.0-173-generic   5.4.0-173.191
   linux-image-5.4.0-173-generic-lpae  5.4.0-173.191
   linux-image-5.4.0-173-lowlatency  5.4.0-173.191
   linux-image-gcp-lts-20.04       5.4.0.1124.126
   linux-image-generic             5.4.0.173.171
   linux-image-generic-lpae        5.4.0.173.171
   linux-image-gkeop               5.4.0.1087.85
   linux-image-gkeop-5.4           5.4.0.1087.85
   linux-image-kvm                 5.4.0.1108.104
   linux-image-lowlatency          5.4.0.173.171
   linux-image-oem                 5.4.0.173.171
   linux-image-oem-osp1            5.4.0.173.171
   linux-image-raspi               5.4.0.1104.134
   linux-image-raspi2              5.4.0.1104.134
   linux-image-virtual             5.4.0.173.171

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
   linux-image-5.4.0-1124-gcp      5.4.0-1124.133~18.04.1
   linux-image-5.4.0-173-generic   5.4.0-173.191~18.04.1
   linux-image-5.4.0-173-lowlatency  5.4.0-173.191~18.04.1
   linux-image-gcp                 5.4.0.1124.100
   linux-image-generic-hwe-18.04   5.4.0.173.191~18.04.141
   linux-image-lowlatency-hwe-18.04  5.4.0.173.191~18.04.141
   linux-image-oem                 5.4.0.173.191~18.04.141
   linux-image-oem-osp1            5.4.0.173.191~18.04.141
   linux-image-snapdragon-hwe-18.04  5.4.0.173.191~18.04.141
   linux-image-virtual-hwe-18.04   5.4.0.173.191~18.04.141

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.