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Ubuntu 22.04 LTS USN-6461-1: Critical Kernel Flaws Fixed

ubuntu
Calendar Grey October 31, 2023
Dist Ubuntu Esm H88
Upgrades for Ubuntu 22.04 LTS address several kernel vulnerabilities, improving system reliability and safeguarding against potential threats.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-oem-6.1: Linux kernel for OEM systems

Details:

Yu Hao discovered that the UBI driver in the Linux kernel did not properly

check for MTD with zero erasesize during device attachment. A local

privileged attacker could use this to cause a denial of service (system

crash). (CVE-2023-31085)

Marek Marczykowski-Górecki discovered that the Xen event channel

infrastructure implementation in the Linux kernel contained a race

condition. An attacker in a guest VM could possibly use this to cause a

denial of service (paravirtualized device unavailability). (CVE-2023-34324)

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

not properly validate some attributes passed from userspace. A local

attacker could use this to cause a denial of service (system crash) or

possibly expose sensitive information (kernel memory). (CVE-2023-39189)

Bien Pham discovered that...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu kernel flaw system crash 2023

Update Instructions

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

Ubuntu 22.04 LTS:
   linux-image-6.1.0-1025-oem      6.1.0-1025.25
   linux-image-oem-22.04           6.1.0.1025.26
   linux-image-oem-22.04a          6.1.0.1025.26
   linux-image-oem-22.04b          6.1.0.1025.26
   linux-image-oem-22.04c          6.1.0.1025.26

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-6461-1

CVE-2023-31085, CVE-2023-34324, CVE-2023-39189, CVE-2023-4244,

CVE-2023-42754, CVE-2023-4921, CVE-2023-5345

Severity
critical
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6461-1

Topics%20covered

Topics Covered

security advisory denial of service Ubuntu kernel flaw system crash 2023

Package Information

https://launchpad.net/ubuntu/+source/linux-oem-6.1/6.1.0-1025.25

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