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Ubuntu 22.04 LTS: USN-6386-3 Critical: Kernel Memory Leak Threat

ubuntu
Calendar Grey October 3, 2023
Dist Ubuntu Esm H88
Urgent patches released addressing security flaws in Linux kernel for Ubuntu 22.04 and 20.04 LTS, necessitating prompt action.
Several security issues were fixed in the Linux kernel.

Summary

A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 22.04 LTS - Ubuntu 20.04 LTS Summary: Several security issues were fixed in the Linux kernel. Software Description: - linux-intel-iotg: Linux kernel for Intel IoT platforms - linux-oracle: Linux kernel for Oracle Cloud systems - linux-intel-iotg-5.15: Linux kernel for Intel IoT platforms - linux-oracle-5.15: Linux kernel for Oracle Cloud systems Details: Jana Hofmann, Emanuele Vannacci, Cedric Fournet, Boris Kopf, and Oleksii Oleksenko discovered that some AMD processors could leak stale data from division operations in certain situations. A local attacker could possibly use this to expose sensitive information. (CVE-2023-20588) It was discovered that the bluetooth subsystem in the Linux kernel did not properly handle L2CAP socket release, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service (system crash) or possibly ex...

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Topics%20covered

Topics Covered

security advisory denial of service critical memory leak ubuntu linux kernel

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 22.04 LTS: linux-image-5.15.0-1040-intel-iotg 5.15.0-1040.46 linux-image-5.15.0-1044-oracle 5.15.0-1044.50 linux-image-intel-iotg 5.15.0.1040.40 linux-image-oracle 5.15.0.1044.39 linux-image-oracle-lts-22.04 5.15.0.1044.39 Ubuntu 20.04 LTS: linux-image-5.15.0-1040-intel-iotg 5.15.0-1040.46~20.04.1 linux-image-5.15.0-1044-oracle 5.15.0-1044.50~20.04.1 linux-image-intel 5.15.0.1040.46~20.04.31 linux-image-intel-iotg 5.15.0.1040.46~20.04.31 linux-image-oracle 5.15.0.1044.50~20.04.1 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-6386-3

https://ubuntu.com/security/notices/USN-6386-1

CVE-2023-20588, CVE-2023-40283, CVE-2023-4128, CVE-2023-4569

Severity
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Critical

Ubuntu Security Notice USN-6386-3

Topics%20covered

Topics Covered

security advisory denial of service critical memory leak ubuntu linux kernel

Package Information

https://launchpad.net/ubuntu/+source/linux-intel-iotg/5.15.0-1040.46 https://launchpad.net/ubuntu/+source/linux-oracle/5.15.0-1044.50 https://launchpad.net/ubuntu/+source/linux-intel-iotg-5.15/5.15.0-1040.46~20.04.1 https://launchpad.net/ubuntu/+source/linux-oracle-5.15/5.15.0-1044.50~20.04.1

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