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Ubuntu 20.04 & 18.04 LTS USN-5951-1 Critical: Linux Kernel Threats

ubuntu
Calendar Grey March 14, 2023
Scroller Ubuntu
Various security vulnerabilities in the Linux kernel have been patched for Ubuntu. It's crucial to update your system to fix potential denial of service risks and other security flaws.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-ibm: Linux kernel for IBM cloud systems

- linux-ibm-5.4: Linux kernel for IBM cloud systems

Details:

It was discovered that the Upper Level Protocol (ULP) subsystem in the

Linux kernel did not properly handle sockets entering the LISTEN state in

certain protocols, 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-2023-0461)

It was discovered that the NVMe driver in the Linux kernel did not properly

handle reset events in some situations. A local attacker could use this to

cause a denial of service (system crash). (CVE-2022-3169)

It was discovered that a use-after-free vulnerability existed in the SGI

GRU driver in the Linux kernel. A local attacker could possibly use this to

cause a denial of service (system crash) or possibly execute arbitrary

code. (CVE-2022-34...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu system crash Linux kernel use-after-free

Update Instructions

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

Ubuntu 20.04 LTS:
   linux-image-5.4.0-1045-ibm      5.4.0-1045.50
   linux-image-ibm                 5.4.0.1045.71
   linux-image-ibm-lts-20.04       5.4.0.1045.71

Ubuntu 18.04 LTS:
   linux-image-5.4.0-1045-ibm      5.4.0-1045.50~18.04.1
   linux-image-ibm                 5.4.0.1045.56

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-5951-1

CVE-2022-3169, CVE-2022-3424, CVE-2022-3435, CVE-2022-3521,

CVE-2022-3545, CVE-2022-3623, CVE-2022-36280, CVE-2022-41218,

CVE-2022-4139, CVE-2022-42328, CVE-2022-42329, CVE-2022-47520,

CVE-2022-47929, CVE-2023-0045, CVE-2023-0266, CVE-2023-0394,

CVE-2023-0461, CVE-2023-20938, CVE-2023-23454, CVE-2023-23455

Severity
critical
Lowest
Low
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Critical

March 14, 2023

Topics%20covered

Topics Covered

security advisory denial of service critical Ubuntu system crash Linux kernel use-after-free

Package Information

https://launchpad.net/ubuntu/+source/linux-ibm/5.4.0-1045.50
https://launchpad.net/ubuntu/+source/linux-ibm-5.4/5.4.0-1045.50~18.04.1

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