Jcc erratum, new vulnerability of cpus intel affects performance
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Every month, Intel released a security advisory allowing the security research community to disclose their findings and update Intel partners on the security of their products. A new vulnerability called JCC Erratum was recently discovered, which is more like a compendium of 77 vulnerabilities affecting different facets of the Intel platform.
JCC Erratum affects Coffee Lake, Amber Lake, Cascade Lake, Skylake, Whiskey Lake, Comet Lake and Kaby Lake processors
This month, Intel has revealed 77 vulnerabilities ranging from processors to graphics to even ethernet drivers. 67 of these errors have been discovered by Intel internally, while external sources have discovered the other ten. Many of these vulnerabilities are minor, although others will have a noticeable impact on Intel products in terms of performance.
More information on these vulnerabilities is available here, the focus of this article being a specific vulnerability called "JCC Erratum". This vulnerability affects most of the processors recently released by Intel, including Coffee Lake, Amber Lake, Cascade Lake, Skylake, Whiskey Lake, Comet Lake and Kaby Lake.
This error is related to Intel's ICache / Decodes Streaming buffer, although the problem can be solved via a firmware update. However, this update could fix the problem, but with side effects that affect performance. According to the document, the performance of the processor can decrease between 0 and 4%, which will depend on the task that the CPU is performing.
visit our guide on the best processors on the market
Phoronix published a comparative analysis of this JCC Erratum vulnerability and how the patch affects performance in different benchmarks. In some cases the impact can be important, so we recommend reading this complete comparison at this link.
Unlike other Intel patches, fixes for JCC Erratum can affect consumer workloads, meaning this update will affect more overall PC users than previous Intel software mitigations. We will keep you informed.
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