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AUSCERT External Security Bulletin Redistribution
ESB-2023.3305
USN-6152-1: Linux kernel (GKE) regression
9 June 2023
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AusCERT Security Bulletin Summary
---------------------------------
Product: Linux kernel
Publisher: Ubuntu
Operating System: Ubuntu
Resolution: Patch/Upgrade
Original Bulletin:
https://ubuntu.com/security/notices/USN-6152-1
Comment: CVSS (Max): None available when published
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USN-6152-1: Linux kernel (GKE) regression
8 June 2023
The system could suffer with performance degradation in certain conditions.
Releases
o Ubuntu 22.04 LTS
o Ubuntu 20.04 LTS
Packages
o linux-gke - Linux kernel for Google Container Engine (GKE) systems
Details
It was discovered that NFS client's access cache implementation in the
Linux kernel caused a severe NFS performance degradation in certain
conditions. This updated makes the NFS file-access stale cache behavior
to be optional.
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Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 22.04
o linux-image-gke - 5.15.0.1035.34
o linux-image-5.15.0-1035-gke - 5.15.0-1035.40
o linux-image-gke-5.15 - 5.15.0.1035.34
Ubuntu 20.04
o linux-image-5.4.0-1101-gke - 5.4.0-1101.108
o linux-image-gke - 5.4.0.1101.106
o linux-image-gke-5.4 - 5.4.0.1101.106
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
o https://launchpad.net/bugs/2022098
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===========================================================================
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The University of Queensland
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