--- title: Linux 7.2-rc6 Fixes Some AMD Zen 5 CPUs Being Mistakenly... description: A bug in the Linux kernel caused some AMD Zen 5 CPUs to be misidentified as Zen 6 due to an incorrect ID range assignment. A patch corrects this by reserving... canonical: https://daily.dev/posts/linux-7-2-rc6-fixes-some-amd-zen-5-cpus-being-mistakenly-identified-as-zen-6-n5dvvt7z5 twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: Linux 7.2-rc6 Fixes Some AMD Zen 5 CPUs Being Mistakenly Identified As Zen 6 | daily.dev og:description: A bug in the Linux kernel caused some AMD Zen 5 CPUs to be misidentified as Zen 6 due to an incorrect ID range assignment. A patch corrects this by reserving... og:url: https://daily.dev/posts/linux-7-2-rc6-fixes-some-amd-zen-5-cpus-being-mistakenly-identified-as-zen-6-n5dvvt7z5 og:image: https://api.daily.dev/og/posts/N5DvVT7Z5.png og:image:alt: Linux 7.2-rc6 Fixes Some AMD Zen 5 CPUs Being Mistakenly Identified As Zen 6 og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Linux 7.2-rc6 Fixes Some AMD Zen 5 CPUs Being Mistakenly Identified As Zen 6 **[Phoronix](https://daily.dev/sources/phoronix)** · 2 min read · 0 upvotes · 0 comments ## Summary A bug in the Linux kernel caused some AMD Zen 5 CPUs to be misidentified as Zen 6 due to an incorrect ID range assignment. A patch corrects this by reserving 0xd0–0xd7 for Zen 5, while updating the Zen 6 ranges to 0xc0–0xcf, 0xd8–0xef, 0x50–0x5f, and 0x80–0xaf. This fix is part of the x86 fixes pull targeting Linux 7.2-rc6. The same pull also includes a fix for x86 memcmp() to prevent instruction reordering bugs that caused unbootable VMs under Xen. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [Linux 7.1-rc7 Adding More AMD Zen 6 CPU Models](https://daily.dev/posts/linux-7-1-rc7-adding-more-amd-zen-6-cpu-models-ln57opxyx) · Phoronix · 0 upvotes · 0 comments - [Linux 7.0 Sees Last Minute Fix For Bogus Hardware Errors On AMD Zen 3](https://daily.dev/posts/linux-7-0-sees-last-minute-fix-for-bogus-hardware-errors-on-amd-zen-3-nusqbvym9) · Phoronix · 0 upvotes · 0 comments - [AMD Expands The Range Of Zen 6 CPUs Detected By The Linux Kernel](https://daily.dev/posts/amd-expands-the-range-of-zen-6-cpus-detected-by-the-linux-kernel-jt0st35z5) · Phoronix · 0 upvotes · 0 comments --- Tags: [#linux](https://daily.dev/tags/linux), [#amd](https://daily.dev/tags/amd) [View this post on daily.dev](https://daily.dev/posts/linux-7-2-rc6-fixes-some-amd-zen-5-cpus-being-mistakenly-identified-as-zen-6-n5dvvt7z5) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"Linux 7.2-rc6 Fixes Some AMD Zen 5 CPUs Being Mistakenly Identified As Zen 6","url":"https://daily.dev/posts/linux-7-2-rc6-fixes-some-amd-zen-5-cpus-being-mistakenly-identified-as-zen-6-n5dvvt7z5","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/linux-7-2-rc6-fixes-some-amd-zen-5-cpus-being-mistakenly-identified-as-zen-6-n5dvvt7z5"},"datePublished":"2026-08-02T10:28:55.685Z","dateModified":"2026-08-03T00:13:18.493Z","description":"A bug in the Linux kernel caused some AMD Zen 5 CPUs to be misidentified as Zen 6 due to an incorrect ID range assignment. 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