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Ubuntu 20.04 LTS USN-5362-1 Critical: Linux Kernel Security Flaws

ubuntu
Calendar Grey March 31, 2022
Dist Ubuntu Esm H88
Critical flaws in Ubuntu's Linux kernel necessitate immediate patches to avert potential exploitation and safeguard systems.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-intel-5.13: Linux kernel for Intel IOTG

Details:

Nick Gregory discovered that the Linux kernel incorrectly handled network

offload functionality. A local attacker could use this to cause a denial of

service or possibly execute arbitrary code. (CVE-2022-25636)

Enrico Barberis, Pietro Frigo, Marius Muench, Herbert Bos, and Cristiano

Giuffrida discovered that hardware mitigations added by ARM to their

processors to address Spectre-BTI were insufficient. A local attacker could

potentially use this to expose sensitive information. (CVE-2022-23960)

It was discovered that the BPF verifier in the Linux kernel did not

properly restrict pointer types in certain situations. A local attacker

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

execute arbitrary code. (CVE-2022-23222)

Max Kellermann discovered that the Linux kernel incorrectly handled Unix

pipes. A local attacker could ...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical arbitrary code execution information exposure ubuntu linux kernel

Update Instructions

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

Ubuntu 20.04 LTS:
  linux-image-5.13.0-1010-intel   5.13.0-1010.10
  linux-image-intel               5.13.0.1010.11

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-5362-1

CVE-2021-4083, CVE-2021-4090, CVE-2021-4155, CVE-2021-42327,

CVE-2022-0001, CVE-2022-0185, CVE-2022-0330, CVE-2022-0435,

CVE-2022-0492, CVE-2022-0516, CVE-2022-0742, CVE-2022-0847,

CVE-2022-22942, CVE-2022-23222, CVE-2022-23960, CVE-2022-25636

Severity
critical
Lowest
Low
Medium
High
Critical

April 01, 2022

Topics%20covered

Topics Covered

security advisory denial of service critical arbitrary code execution information exposure ubuntu linux kernel

Package Information

https://launchpad.net/ubuntu/+source/linux-intel-5.13/5.13.0-1010.10

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