this post was submitted on 27 Aug 2025
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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
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The answer as always is, it depends.
Not all implementations rely on shim.
if you set up secureboot without doing anything more than instaling the OS.... yeah probably it is true. Edit: e.g. GRUB2 generally relies on shim. sysemd-boot doesn't
I haven't checked the specific key that signs shim to confirm the expiration date, but there generally is a date, as we're talking about certs and keys here.
Edit 2: Basically what this article is saying is that the machines will need a new platform key (mited in 2023) enrolled in the tpms, with often comes from the firmware (when tpms are wiped for initial enrollment of a new install/setup, they tend to enroll whatever platform keys from microsoft are baked in to the uefi firmware).
So basically, if you haven't had a bios/uefi firmware update since 2022, there's no way for you to have have the new key trusted by your tpm, and the whole chain of trust falls apart when the key you do have expires. So you'll need to disable secureboot. If you use shim and/or the microsoft platform key in someway.