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Ubuntu 22.04 LTS USN-5703-1 Critical: Linux Kernel IoT Threats

ubuntu
Calendar Grey October 26, 2022
Dist Ubuntu Esm H88
Multiple vulnerabilities in the Ubuntu linux-intel-iotg kernel may cause system crashes and allow unauthorized code execution, making timely updates essential
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-intel-iotg: Linux kernel for Intel IoT platforms

Details:

Selim Enes Karaduman discovered that a race condition existed in the

General notification queue implementation of the Linux kernel, leading to a

use-after-free vulnerability. A local attacker could use this to cause a

denial of service (system crash) or possibly execute arbitrary code.

(CVE-2022-1882)

Pawan Kumar Gupta, Alyssa Milburn, Amit Peled, Shani Rehana, Nir Shildan

and Ariel Sabba discovered that some Intel processors with Enhanced

Indirect Branch Restricted Speculation (eIBRS) did not properly handle RET

instructions after a VM exits. A local attacker could potentially use this

to expose sensitive information. (CVE-2022-26373)

Eric Biggers discovered that a use-after-free vulnerability existed in the

io_uring subsystem in the Linux kernel. A local attacker could possibly use

this to cause a denial of serv...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service code execution system update ubuntu linux kernel intel iot

Update Instructions

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

Ubuntu 22.04 LTS:
   linux-image-5.15.0-1017-intel-iotg  5.15.0-1017.22
   linux-image-intel-iotg          5.15.0.1017.18

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-5703-1

CVE-2022-1882, CVE-2022-26373, CVE-2022-3176, CVE-2022-36879,

CVE-2022-39189

Severity
critical
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Low
Medium
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Critical

October 26, 2022

Topics%20covered

Topics Covered

security advisory denial of service code execution system update ubuntu linux kernel intel iot

Package Information

https://launchpad.net/ubuntu/+source/linux-intel-iotg/5.15.0-1017.22

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