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Ubuntu 20.04 LTS: USN-5295-1 Critical: Linux Kernel DoS & Execution Issues

ubuntu
Calendar Grey February 17, 2022
Dist Ubuntu Esm H88
Various vulnerabilities remediated in Ubuntu's linux-hwe-5.13 kernel. Detailed guidance available for impacted devices.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

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

Details:

It was discovered that the Packet network protocol implementation in the

Linux kernel contained a double-free vulnerability. A local attacker could

use this to cause a denial of service (system crash) or possibly execute

arbitrary code. (CVE-2021-22600)

Jann Horn discovered a race condition in the Unix domain socket

implementation in the Linux kernel that could result in a read-after-free.

A local attacker could use this to cause a denial of service (system crash)

or possibly execute arbitrary code. (CVE-2021-4083)

Kirill Tkhai discovered that the XFS file system implementation in the

Linux kernel did not calculate size correctly when pre-allocating space in

some situations. A local attacker could use this to expose sensitive

information. (CVE-2021-4155)

Sushma Venkatesh Reddy discovered that the Intel i915 graphics driver in

the Linu...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service arbitrary code execution system update ubuntu linux kernel HWE

Update Instructions

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

Ubuntu 20.04 LTS:
  linux-image-5.13.0-30-generic   5.13.0-30.33~20.04.1
  linux-image-5.13.0-30-generic-64k  5.13.0-30.33~20.04.1
  linux-image-5.13.0-30-generic-lpae  5.13.0-30.33~20.04.1
  linux-image-5.13.0-30-lowlatency  5.13.0-30.33~20.04.1
  linux-image-generic-64k-hwe-20.04  5.13.0.30.33~20.04.17
  linux-image-generic-hwe-20.04   5.13.0.30.33~20.04.17
  linux-image-generic-lpae-hwe-20.04  5.13.0.30.33~20.04.17
  linux-image-lowlatency-hwe-20.04  5.13.0.30.33~20.04.17
  linux-image-virtual-hwe-20.04   5.13.0.30.33~20.04.17

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.

References

https://ubuntu.com/security/notices/USN-5295-1

CVE-2021-22600, CVE-2021-4083, CVE-2021-4155, CVE-2022-0330,

CVE-2022-22942

Severity
critical
Lowest
Low
Medium
High
Critical

February 18, 2022

Topics%20covered

Topics Covered

security advisory denial of service arbitrary code execution system update ubuntu linux kernel HWE

Package Information

https://launchpad.net/ubuntu/+source/linux-hwe-5.13/5.13.0-30.33~20.04.1

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