Still no love for 1000- or 2000-series
In an apparent reversal, AMD has decided that its Ryzen 3000-series processors released in 2019 are actually worth patching against the recently disclosed SinkClose vulnerability.The vulnerability, which specifically impacts AMD silicon, enables malicious software or users that have already gained access to the operating system kernel to run code in System Management Mode out of sight of the operating system, antivirus tools, or the hypervisor.
In its initial advisory, AMD promised fixes in the form of BIOS updates and/or hot-loadable microcode updates. But while much of the House of Zen's datacenter and embedded lineup was slated to receive the patch, not all of its consumer-focused parts were so lucky. Among the more notable exceptions was AMD's Ryzen 3000-series of desktop CPUs codenamed Matisse, which used the same Zen 2 core as AMD's Rome generation of Epyc datacenter chips. However, in a, the Ryzen 3000 family is now listed as eligible for the patch, which can be found in"ComboAM4PI 1.0.0ba" released late last week.Raptor Lake microcode limits Intel chips to a mere 1.55 volts to prevent CPU destructionhas reached out to AMD for comment on the decision.
The decision also isn't surprising considering that AMD was able to patch other Zen 2 parts without issue. Alas, it doesn't appear that AMD's older Ryzen 1000- or 2000-series client CPUs will be so lucky. But as we mentioned before, if you happen to have an affected CPU, so long as you don't go downloading sketchy executables from disreputable sites and keep your OS up to date, you can at least minimize the likelihood of the SinkClose flaw being exploited.
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