A team of Google researchers working with AMD recently discovered a major CPU exploit on Zen-based processors. The exploit allows anyone with local admin privileges to write and push custom microcode updates to affected CPUs. The same Google team has released the full deep-dive on the exploit, including how to write your own microcode. Anyone can now effectively jailbreak their own AMD CPUs.
The exploit affects all AMD CPUs using the Zen 1 to Zen 4 architectures. AMD released a BIOS patch plugging the exploit shortly after its discovery, but any of the above CPUs with a BIOS patch before 2024-12-17 will be vulnerable to the exploit. Though a malicious actor wishing to abuse this vulnerability needs an extremely high level of access to a system to exploit it, those concerned should update their or their organization’s systems to the most recent BIOS update.
coming from jailbreaking iphones, what exactly does jailbreaking a cpu imply in this case?
I figure you can already do what you want in your pc so what “features” was being blocked from users?
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I would guess Zen 1 through Zen 4 is currently the majority of gaming PCs. It’s certainly a massive percentage. I don’t think game companies can realistically just blacklist all of them.
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Okay, but I’m definitely certain that the majority of gamers running Windows 11 in secure boot mode with TPM 2.0 are running Zen 3 or 4. How many times can they cut their user-base in half before the people who are left leave because it’s a dead game?
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Microcode is used to „patch” a CPU in case bugs are found and allows tweaks to very low level logic. From the original research paper it looks like understanding microcode is a challenge, let alone writing new microcode. In all likelihood this will be used for more research and reverse engineering of things that are trade secrets closed from public knowledge.
You can jailbreak your tesla to give you heated seats without paying that clown. For starters.
You said the phrase, so I unfortunately need to share this music video. My apologies.