Linux 7.3-rc4 blocks dangerous Granite Rapids microcode and cleans up LLM-caught bugs
On September 20, 2026, Linus Torvalds released Linux 7.3-rc4, a “bigger than usual” candidate that rejects an Intel Granite Rapids microcode capable of machine check exceptions and lands a wave of error-path fixes caught by LLMs. Testers on Intel hardware should update immediately.