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Ubuntu 22.04 LTS USN-6626-3 Moderate: Azure Kernel Denial Of Service

ubuntu
Calendar Grey February 15, 2024
Dist Ubuntu Esm H88
Vulnerabilities addressed in Ubuntu kernel via USN-6626-3, mitigating denial of service risks and necessitating updates.
Several security issues were fixed in the Linux kernel.

Summary

Several security issues were fixed in the Linux kernel.

Software Description:

- linux-azure: Linux kernel for Microsoft Azure Cloud systems

- linux-azure-fde: Linux kernel for Microsoft Azure CVM cloud systems

- linux-azure-5.15: Linux kernel for Microsoft Azure cloud systems

- linux-azure-fde-5.15: Linux kernel for Microsoft Azure CVM cloud systems

Details:

Quentin Minster discovered that a race condition existed in the KSMBD

implementation in the Linux kernel when handling sessions operations. A

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

or possibly execute arbitrary code. (CVE-2023-32250, CVE-2023-32252,

CVE-2023-32257)

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)

Zheng Wang discovered a u...

Read the Full Advisory

Topics%20covered

Topics Covered

security advisory denial of service system update ubuntu security issues linux kernel azure kernel

Update Instructions

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

Ubuntu 22.04 LTS:
   linux-image-5.15.0-1056-azure   5.15.0-1056.64
   linux-image-5.15.0-1056-azure-fde  5.15.0-1056.64.1
   linux-image-azure-fde-lts-22.04  5.15.0.1056.64.34
   linux-image-azure-lts-22.04     5.15.0.1056.52

Ubuntu 20.04 LTS:
   linux-image-5.15.0-1056-azure   5.15.0-1056.64~20.04.1
   linux-image-5.15.0-1056-azure-fde  5.15.0-1056.64~20.04.1.1
   linux-image-azure               5.15.0.1056.64~20.04.45
   linux-image-azure-cvm           5.15.0.1056.64~20.04.45
   linux-image-azure-fde           5.15.0.1056.64~20.04.1.34

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-6626-3

https://ubuntu.com/security/notices/USN-6626-1

CVE-2023-32250, CVE-2023-32252, CVE-2023-32257, CVE-2023-34324,

CVE-2023-35827, CVE-2023-46813, CVE-2023-6039, CVE-2023-6176,

CVE-2023-6622, CVE-2024-0641

Severity
important
Lowest
Low
Medium
High
Critical

Ubuntu Security Notice USN-6626-3

Topics%20covered

Topics Covered

security advisory denial of service system update ubuntu security issues linux kernel azure kernel

Package Information

https://launchpad.net/ubuntu/+source/linux-azure/5.15.0-1056.64
https://launchpad.net/ubuntu/+source/linux-azure-fde/5.15.0-1056.64.1

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