Ubuntu 21.10 & 20.04 LTS Security Advisory 5265-1: Denial of Service

ubuntu

February 3, 2022

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-aws: Linux kernel for Amazon Web Services (AWS) systems

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

- linux-kvm: Linux kernel for cloud environments

- linux-oracle: Linux kernel for Oracle Cloud systems

- linux-raspi: Linux kernel for Raspberry Pi systems

- linux-aws-5.11: Linux kernel for Amazon Web Services (AWS) systems

- linux-aws-5.13: Linux kernel for Amazon Web Services (AWS) systems

- linux-gcp-5.11: Linux kernel for Google Cloud Platform (GCP) systems

- linux-hwe-5.13: Linux hardware enablement (HWE) kernel

- linux-oem-5.13: Linux kernel for OEM systems

- linux-oracle-5.11: Linux kernel for Oracle Cloud systems

Details:

Jeremy Cline discovered a use-after-free in the nouveau graphics driver of

the Linux kernel during device removal. A privileged or physically

proximate attacker could use this to cause a denial of service (system

crash). (CVE-...

Read the Full Advisory

Topics Covered

security advisory denial of service kernel fix ubuntu local code execution

Update Instructions

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

Ubuntu 21.10:
  linux-image-5.13.0-1011-kvm     5.13.0-1011.12
  linux-image-5.13.0-1012-aws     5.13.0-1012.13
  linux-image-5.13.0-1013-gcp     5.13.0-1013.16
  linux-image-5.13.0-1016-oracle  5.13.0-1016.20
  linux-image-5.13.0-1016-raspi   5.13.0-1016.18
  linux-image-5.13.0-1016-raspi-nolpae  5.13.0-1016.18
  linux-image-5.13.0-28-generic   5.13.0-28.31
  linux-image-5.13.0-28-generic-64k  5.13.0-28.31
  linux-image-5.13.0-28-generic-lpae  5.13.0-28.31
  linux-image-5.13.0-28-lowlatency  5.13.0-28.31
  linux-image-aws                 5.13.0.1012.13
  linux-image-gcp                 5.13.0.1013.12
  linux-image-generic             5.13.0.28.38
  linux-image-generic-64k         5.13.0.28.38
  linux-image-generic-lpae        5.13.0.28.38
  linux-image-gke                 5.13.0.1013.12
  linux-image-kvm                 5.13.0.1011.11
  linux-image-lowlatency          5.13.0.28.38
  linux-image-oem-20.04           5.13.0.28.38
  linux-image-oracle              5.13.0.1016.16
  linux-image-raspi               5.13.0.1016.21
  linux-image-raspi-nolpae        5.13.0.1016.21
  linux-image-virtual             5.13.0.28.38

Ubuntu 20.04 LTS:
  linux-image-5.11.0-1028-oracle  5.11.0-1028.31~20.04.1
  linux-image-5.11.0-1029-gcp     5.11.0-1029.33~20.04.3
  linux-image-5.13.0-1029-oem     5.13.0-1029.36
  linux-image-5.13.0-28-generic   5.13.0-28.31~20.04.1
  linux-image-5.13.0-28-generic-64k  5.13.0-28.31~20.04.1
  linux-image-5.13.0-28-generic-lpae  5.13.0-28.31~20.04.1
  linux-image-5.13.0-28-lowlatency  5.13.0-28.31~20.04.1
  linux-image-aws                 5.11.0.1028.31~20.04.26
  linux-image-gcp                 5.11.0.1029.33~20.04.27
  linux-image-generic-64k-hwe-20.04  5.13.0.28.31~20.04.15
  linux-image-generic-hwe-20.04   5.13.0.28.31~20.04.15
  linux-image-generic-lpae-hwe-20.04  5.13.0.28.31~20.04.15
  linux-image-lowlatency-hwe-20.04  5.13.0.28.31~20.04.15
  linux-image-oem-20.04c          5.13.0.1029.31
  linux-image-oracle              5.11.0.1028.31~20.04.20
  linux-image-virtual-hwe-20.04   5.13.0.28.31~20.04.15

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.