{"id":25773,"date":"2019-03-02T00:11:00","date_gmt":"2019-03-02T00:11:00","guid":{"rendered":"http:\/\/8be28f44-ce81-40d9-b136-b78b6c50d529"},"modified":"2019-03-02T00:11:00","modified_gmt":"2019-03-02T00:11:00","slug":"microsoft-rolls-out-googles-retpoline-spectre-mitigation-to-windows-10-users","status":"publish","type":"post","link":"https:\/\/www.threatshub.org\/blog\/microsoft-rolls-out-googles-retpoline-spectre-mitigation-to-windows-10-users\/","title":{"rendered":"Microsoft rolls out Google&#8217;s Retpoline Spectre mitigation to Windows 10 users"},"content":{"rendered":"<p>Microsoft has rolled out today cumulative update <a href=\"https:\/\/support.microsoft.com\/en-us\/help\/4482887\/windows-10-update-kb4482887\" target=\"_blank\" rel=\"noopener noreferrer\">KB4482887<\/a>, an update that includes an important security fix, a new mitigation for the Spectre v2 CPU vulnerability.<\/p>\n<div class=\"relatedContent alignRight\">\n<h3 class=\"heading\"><span class=\"int\">More security news<\/span><\/h3>\n<\/div>\n<p>This new mitigation is based on a coding technique called <a href=\"https:\/\/support.google.com\/faqs\/answer\/7625886\" target=\"_blank\" rel=\"noopener noreferrer\">Retpoline<\/a>, developed by Google engineers.<\/p>\n<p>Code written using Retpoline protections are safe from <a href=\"https:\/\/spectreattack.com\/\" target=\"_blank\" rel=\"noopener noreferrer\">Spectre v2<\/a> (CVE-2017-5715), a vulnerability in modern processors that allows attackers to break the isolation between different applications and steal data from locally running processes.<\/p>\n<p>Google has already deployed Retpoline on its Linux-based servers and also contributed patches to the Linux kernel last year. Throughout 2018, Retpoline slowly made its way down major Linux distros such as <a href=\"https:\/\/access.redhat.com\/articles\/3311301\" target=\"_blank\" rel=\"noopener noreferrer\">Red Hat<\/a>, <a href=\"https:\/\/drivers.suse.com\/doc\/Developer_Notes\/Retpoline.html\" target=\"_blank\" rel=\"noopener noreferrer\">SUSE<\/a>, <a href=\"https:\/\/bugs.launchpad.net\/ubuntu\/+source\/gcc-4.8\/+bug\/1749261\" target=\"_blank\" rel=\"noopener noreferrer\">Ubuntu<\/a>, and <a href=\"https:\/\/blogs.oracle.com\/linux\/an-update-on-retpoline-enabled-kernels-for-oracle-linux-v2\" target=\"_blank\" rel=\"noopener noreferrer\">Oracle Linux 6 and 7<\/a>.<\/p>\n<p>Microsoft began working on integrating Retpoline into the Windows kernel last year, and initially, the company <a href=\"https:\/\/www.zdnet.com\/article\/windows-10-will-banish-spectre-slowdowns-with-googles-retpoline-patch\/\" target=\"_blank\">planned<\/a> to deploy the Retpoline mitigations with the next version of Windows 10, 19H1, which is due out this spring.<\/p>\n<p>At the time, some Windows kernel experts, such as CrowdStrike researcher <a href=\"https:\/\/twitter.com\/aionescu\/status\/1052705273461268481\" target=\"_blank\" rel=\"noopener noreferrer\">Alex Ionescu<\/a>, claimed the mitigations would have been compatible with the Windows 10 October 2018 Update, if Microsoft wanted to ship them.<\/p>\n<p>But in an update published today on the Microsoft Community page dedicated to the company&#8217;s work on mitigating Spectre v2, Windows Kernel Team development manager Mehmet Iyigun said things aren&#8217;t that simple.<\/p>\n<section class=\"sharethrough-top\" data-component=\"medusaContentRecommendation\" data-medusa-content-recommendation-options=\"{&quot;promo&quot;:&quot;promo_ZD_recommendation_sharethrough_top_in_article_desktop&quot;,&quot;spot&quot;:&quot;dfp-in-article&quot;}\">\n<\/section>\n<p>&#8220;Due to the complexity of the implementation and changes involved, we are only enabling Retpoline performance benefits for Windows 10, version 1809 and later releases,&#8221; he <a href=\"https:\/\/techcommunity.microsoft.com\/t5\/Windows-Kernel-Internals\/Mitigating-Spectre-variant-2-with-Retpoline-on-Windows\/ba-p\/295618\" target=\"_blank\" rel=\"noopener noreferrer\">said<\/a>. &#8220;Over the coming months, we will enable Retpoline as part of phased rollout via cloud configuration.&#8221;<\/p>\n<p>When Google announced Retpoline last year, the search giant boasted about Retpoline&#8217;s &#8220;negligible impact on performance,&#8221; citing numbers of up to 1.5 percent performance impact on Google Cloud servers.<\/p>\n<p>These numbers war far smaller than the 10-20 percent impact that most other Linux distros were reporting at the time, distros that relied on a mixture of OS updates and CPU microcode updates to handle Spectre v2 mitigations, considered the trickier of the original Meltdown and Spectre vulnerabilities revealed in January 2018.<\/p>\n<p><span class=\"img aspect-set\"><img decoding=\"async\" src=\"https:\/\/zdnet3.cbsistatic.com\/hub\/i\/2019\/03\/02\/1ce9aaa6-3160-42d9-a9ff-4535c592e447\/e462f7b7c78a0aa0d59e1168a8b0bb6f\/windows-update-retpoline.png\" class=\"\" alt=\"Windows Update Retpoline\"\/><\/span> <span class=\"credit\">Image: ZDNet<\/span> <\/p>\n<h3>Related cybersecurity news coverage:<\/h3>\n<p>READ MORE <a href=\"https:\/\/www.zdnet.com\/article\/microsoft-rolls-out-googles-retpoline-spectre-mitigation-to-windows-10-users\/#ftag=RSSbaffb68\">HERE<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>KB4482887, released today, enables Google&#8217;s Retpoline mitigation in the Windows 10 kernel (only for v1809 users).<br \/>\nREAD MORE HERE&#8230;<\/p>\n","protected":false},"author":2,"featured_media":25774,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"colormag_page_layout":"default_layout","footnotes":""},"categories":[62],"tags":[],"class_list":["post-25773","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-zdnet-security"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Microsoft rolls out Google&#039;s Retpoline Spectre mitigation to Windows 10 users 2026 | ThreatsHub Cybersecurity News<\/title>\n<meta name=\"description\" content=\"ThreatsHub Cybersecurity News | ThreatsHub.org | Cloud Security &amp; Cyber Threats Analysis Hub. 100% Free OSINT Threat Intelligent and Cybersecurity News.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link 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