The scheduled release of Debian 12.3 today has been put on hold. This decision came after a bug was found in Linux kernel 6.1.64-1, which was linked to possible data corruption on systems with an ext4 file system.
The developers have issued an urgent advisory to users, especially cautioning those with unattended-upgrades configured on their systems.
The bug, documented under the identifier #1057843, poses a risk of data corruption. As a result, the team responsible for the 12.3 image release has decided to postpone the rollout to address these critical fixes.
Users are strongly advised to refrain from updating their systems at this time. If you attempt to update your system now, it will initiate downloading and installing all the required packages for transitioning to Debian 12.3.
This includes the “linux-image-amd64” meta-package, which corresponds to the Linux kernel version 6.1.64-1 and is currently known to have an issue.
Of course, we must make a necessary clarification. If you did upgrade to Debian 12.3, which uses ext4 as the default filesystem, this does not mean that your data will be corrupted, but rather that there is some risk of this happening.
The Debian developers are actively working on a solution, and updates will be provided as they become available. In the meantime, users can follow the progress and obtain more information about the bug by visiting the Debian bug tracking page here.
According to the latest information referencing the bug tracker, a patch in the upstream Linux kernel 6.1.65 addressed the issue, as v6.1.66-1 is expected to land in Debian 12.3.
