AMD ZEN 2 UPDATE
We will update this blog post as important developments occur. AMD (NASDAQ: AMD) today announced the global availability of its 2 nd Generation Ryzen Desktop processors, starting with four models optimized for gamers, creators, and hardware enthusiasts: Ryzen 7 2700X, Ryzen 7 2700, Ryzen 5 2600X, and Ryprocessors. Send an email to or chat with support live. If you have any questions about this vulnerability or need assistance with the potential mitigation steps you can take, our support team is here for you 24/7. What is it AMD's 7nm CPU architecture When is it out Out since JHow much is it Starting at 199 (about 160, AU290) These chips are the first consumer-ready processors based on. When you are done, the bug will go away, but there is no guarantee that this setting will persist between reboots, so you’ll want to add it to your boot-time automation.
AMD ZEN 2 INSTALL
The chicken bit for the exploitable feature in the AMD chips can be disabled and re-enabled by the Linux utilities "rdmsr" and "wrmsr" that read and write a “machine-specific register.” Install the “msr-tools” package, then follow the instructions in this blog post (authored by Tavis Ormandy, the Google security analyst who discovered the vulnerability) to set the chicken bit for this operation. When it is set, certain features in the hardware are disabled. Zen is the codename for a family of computer processor microarchitectures from AMD, first launched in February 2017 with the first generation of its Ryzen.
AMD ZEN 2 SOFTWARE
A chicken bit is a software feature flag that controls hardware behavior. The chicken bit workaround is generally applicable in case a particular operating system does not have an update with the new microcode. If it is, the OS will install the microcode that fixes the issue, and if the microcode is not available it will set the “chicken bit” to disable the vulnerable feature. The most recent Linux kernel versions, released on July 24, have automated support for testing whether the vulnerable microcode is installed. Equinix Metal customers use a wide variety of operating systems, some of which have already incorporated the following fixes, while others have not. A customer can boot an affected system into an OS that fixes the bug. There are workarounds customers can implement. Additionally, we are working with our OS partners to ship updated OS images that include the updated kernels and/or the updated microcode. We are working with our hardware vendors to obtain the firmware updates that will apply the fix on impacted Equinix Metal machines as soon as those updates are ready. After immediate investigation, the Equinix Metal Engineering team identified a number of Equinix Metal customers and servers that were impacted, as well as the options for mitigating the bug.ĪMD has issued updated microcode that fixes the Zenbleed vulnerability.
Earlier this week, a Google information security team revealed a new flaw in AMD's Zen 2 processors referred to as “Zenbleed” that impacts AMD’s entire Zen 2 product stack. The AMD Zen 2 Processor IEEE Journals & Magazine IEEE Xplore The AMD Zen 2 Processor Abstract: The Zen 2 processor is designed to meet the needs of diverse markets spanning server, desktop, mobile, and workstation.
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