Canonical Releases New Ubuntu Kernel Updates to Fix Data Corruption Bug

New Ubuntu Kernel Updates

Canonical has released today new Ubuntu kernel updates to address a regression introduced by the previous kernel updates in the software RAID10 driver, which could lead to data corruption.

I received an email from Brian Kemp the other day informing me about the fact that Canonical has pulled back the Linux kernel updates released on December 2nd without explanation. The kernel updates were available for all supported Ubuntu release and addressed up to 14 security vulnerabilities.

The explanation for the withdrawal comes today via a new security advisory published by Canonical’s Ubuntu Kernel team for Ubuntu 20.10 (Groovy Gorilla), Ubuntu 20.04 LTS (Focal Fossa), Ubuntu 18.04 LTS (Bionic Beaver), and Ubuntu 16.04 LTS (Xenial Xerus) systems.

According to the advisory, the kernel updates published on December 2nd introduced a regression in Linux kernel’s software RAID10 driver, which, when used with fstrim, could lead to data corruption. The bug was also reported by users on Ubuntu’s Launchpad.

Therefore, Canonical released today a new set of kernels for Ubuntu 20.10, Ubuntu 20.04 LTS, Ubuntu 18.04 LTS, and Ubuntu 16.04 LTS systems on all supported architectures to address the said regression.

Users are now urged to update their installations to the new Linux kernel version available in the stable software repositories, including linux-image 5.8.0-33.36 for Ubuntu 20.10 (64-bit), linux-image 5.4.0-58.64 for Ubuntu 20.04 LTS (64-bit), linux-image 5.4.0-58.64~18.04.1 for Ubuntu 18.04 LTS systems (64-bit and 32-bit) running Linux 5.4 LTS.

Additionally, users of Ubuntu 18.04 LTS and Ubuntu 16.04 LTS systems (64-bit and 32-bit) running Linux kernel 4.15 will have to update to linux-image 4.15.0-128.131 and linux-image 4.15.0-128.131~16.04.1 respectively.

To update your installations, simply run the sudo apt-get update && sudo apt-get full-upgrade command in the Terminal app or the virtual console. After a kernel update, you will have to reboot your computers, as well as to rebuild and reinstall any third-party kernel modules you might have installed.

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