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Ubuntu 23.10 USN-6724-2 Critical: Kernel Denial of Service Issues

ubuntu
Calendar Grey April 16, 2024
Dist Ubuntu Esm H88
Multiple vulnerabilities in the Linux kernel impact Ubuntu users and sysadmins, highlighting the need for prompt action to ensure system safety and integrity.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-raspi: Linux kernel for Raspberry Pi systems

- linux-aws-6.5: Linux kernel for Amazon Web Services (AWS) systems

Details:

Pratyush Yadav discovered that the Xen network backend implementation in

the Linux kernel did not properly handle zero length data request, leading

to a null pointer dereference vulnerability. An attacker in a guest VM

could possibly use this to cause a denial of service (host domain crash).

(CVE-2023-46838)

It was discovered that the Habana's AI Processors driver in the Linux

kernel did not properly initialize certain data structures before passing

them to user space. A local attacker could use this to expose sensitive

information (kernel memory). (CVE-2023-50431)

It was discovered that the device mapper driver in the Linux kernel did not

properly validate target size during certain memory allocations. A local

attacker could use this to cause a denia...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu kernel system update memory exposure critical security issue

Update Instructions

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

Ubuntu 23.10:
   linux-image-6.5.0-1014-raspi    6.5.0-1014.17
   linux-image-raspi               6.5.0.1014.15
   linux-image-raspi-nolpae        6.5.0.1014.15

Ubuntu 22.04 LTS:
   linux-image-6.5.0-1017-aws      6.5.0-1017.17~22.04.2
   linux-image-aws                 6.5.0.1017.17~22.04.2

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-6724-2

https://ubuntu.com/security/notices/USN-6724-1

CVE-2023-46838, CVE-2023-50431, CVE-2023-52429, CVE-2023-52434,

CVE-2023-52435, CVE-2023-52436, CVE-2023-52438, CVE-2023-52439,

CVE-2023-6610, CVE-2024-22705, CVE-2024-23850, CVE-2024-23851

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6724-2

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu kernel system update memory exposure critical security issue

Package Information

https://launchpad.net/ubuntu/+source/linux-aws-6.5/6.5.0-1017.17~22.04.2

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