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Ubuntu 22.04 LTS USN-5634-1: Critical Linux Kernel Denial Of Service

ubuntu
Calendar Grey September 22, 2022
Dist Ubuntu Esm H88
Urgent notice for Ubuntu 22.04 users regarding the linux-oem-5.17 kernel vulnerability, which may lead to system instability from specially designed packets.
The system could be made to crash if it received specially crafted network traffic.

Summary

The system could be made to crash if it received specially crafted

network traffic.

Software Description:

- linux-oem-5.17: Linux kernel for OEM systems

Details:

Domingo Dirutigliano and Nicola Guerrera discovered that the netfilter

subsystem in the Linux kernel did not properly handle rules that

truncated packets below the packet header size. When such rules are in

place, a remote attacker could possibly use this to cause a denial of

service (system crash).

Topics%20covered

Topics Covered

security advisory denial of service critical advisory service disruption ubuntu linux kernel network issue

Update Instructions

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

Ubuntu 22.04 LTS:
   linux-image-5.17.0-1017-oem     5.17.0-1017.18
   linux-image-oem-22.04           5.17.0.1017.16
   linux-image-oem-22.04a          5.17.0.1017.16

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-5634-1

CVE-2022-36946

Severity
critical
Lowest
Low
Medium
High
Critical

September 22, 2022

Topics%20covered

Topics Covered

security advisory denial of service critical advisory service disruption ubuntu linux kernel network issue

Package Information

https://launchpad.net/ubuntu/+source/linux-oem-5.17/5.17.0-1017.18

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