T2 Linux Discovers (Now Patched) AMD Zen 4 Invalid Opcode Speculation Bug

T2 SDE is not just a Linux distribution, but "a flexible Open Source System Development Environment or Distribution Build Kit," according to a 2022 announcement of its support for 25 CPU architectures, variants, and C libraries. ("Others might even name it Meta Distribution. T2 allows the creation of custom distributions with state of the art technology, up-to-date packages and integrated support for cross compilation.")
And while working on it, Berlin-based T2 Linux developer René Rebe (