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Ubuntu 23.04 USN-6534-2 critical: Linux Kernel DoS threats

ubuntu
Calendar Grey December 12, 2023
Dist Ubuntu Esm H88
Updates addressing various security flaws in the Linux kernel impacting Ubuntu 23.04 have been issued. Ensure you remain informed on this subject.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-gcp: Linux kernel for Google Cloud Platform (GCP) systems

- linux-kvm: Linux kernel for cloud environments

Details:

It was discovered that the USB subsystem in the Linux kernel contained a

race condition while handling device descriptors in certain situations,

leading to a out-of-bounds read vulnerability. A local attacker could

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

(CVE-2023-37453)

Lin Ma discovered that the Netlink Transformation (XFRM) subsystem in the

Linux kernel did not properly initialize a policy data structure, leading

to an out-of-bounds vulnerability. A local privileged attacker could use

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

sensitive information (kernel memory). (CVE-2023-3773)

Lucas Leong discovered that the netfilter subsystem in the Linux kernel did

not properly validate some attributes passed from us...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory Ubuntu Denial of Service system crash Linux kernel out-of-bounds

Update Instructions

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

Ubuntu 23.04:
   linux-image-6.2.0-1018-kvm      6.2.0-1018.18
   linux-image-6.2.0-1020-gcp      6.2.0-1020.22
   linux-image-gcp                 6.2.0.1020.20
   linux-image-kvm                 6.2.0.1018.18

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-6534-2

https://ubuntu.com/security/notices/USN-6534-1

CVE-2023-37453, CVE-2023-3773, CVE-2023-39189, CVE-2023-39192,

CVE-2023-39193, CVE-2023-39194, CVE-2023-39198, CVE-2023-42754,

CVE-2023-5158, CVE-2023-5178, CVE-2023-5717, CVE-2023-6039

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6534-2

Topics%20covered

Topics Covered

security advisory Ubuntu Denial of Service system crash Linux kernel out-of-bounds

Package Information

https://launchpad.net/ubuntu/+source/linux-gcp/6.2.0-1020.22
https://launchpad.net/ubuntu/+source/linux-kvm/6.2.0-1018.18

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