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Home Technology peripherals It Industry AMD announces 'Sinkclose' high-severity vulnerability, affecting millions of Ryzen and EPYC processors

AMD announces 'Sinkclose' high-severity vulnerability, affecting millions of Ryzen and EPYC processors

Aug 10, 2024 pm 10:31 PM
processor amd

According to news from this site on August 10, AMD officially confirmed that there is a new vulnerability called "Sinkclose" in some EPYC and Ryzen processors, with the code "CVE-2023-31315", which may involve millions of AMD users around the world.

AMD 公布“Sinkclose”高危漏洞,數(shù)百萬(wàn)銳龍和 EPYC 處理器受影響


So, what is Sinkclose? According to a report by WIRED, the vulnerability allows intruders to run malicious code in "System Management Mode (SMM)." Intruders are said to be able to take control of each other's systems using a type of malware called a bootkit that cannot be detected by antivirus software.
Note from this site: System Management Mode (SMM) is a special CPU operating mode designed to achieve advanced power management and operating system independent functions. It can provide the same system management interrupt (SMI) handler in the traditional IA-32 architecture. The same execution environment can only be entered through the system management interrupt (SMI) and can only be exited by executing the RSM instruction.
AMD security advisory shows that CPUs including Ryzen 3000 and first-generation EPYC and newer are affected. In this regard, AMD has provided a new version of firmware and microcode patches to alleviate the impact of "Sinkclose" on various generations of CPUs (but there is no repair plan for the Ryzen 3000 series desktop processors).

AMD 公布“Sinkclose”高危漏洞,數(shù)百萬(wàn)銳龍和 EPYC 處理器受影響

Reference: "Guest Memory Vulnerabilities"

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