{"id":112901,"date":"2023-08-10T09:59:07","date_gmt":"2023-08-10T00:59:07","guid":{"rendered":"https:\/\/softantenna.com\/blog\/?p=112901"},"modified":"2023-08-10T09:59:07","modified_gmt":"2023-08-10T00:59:07","slug":"intel-cpu-downfall","status":"publish","type":"post","link":"https:\/\/softantenna.com\/blog\/intel-cpu-downfall\/","title":{"rendered":"\u3010\u60aa\u5922\u518d\u3073\u3011Intel CPU\u306b\u8106\u5f31\u6027\u300cDownfall\u300d\u304c\u767a\u898b\u3002\u5e45\u5e83\u3044CPU\u306b\u5f71\u97ff\u3057\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3078\u306e\u5f71\u97ff\u3082\u5927"},"content":{"rendered":"

\"Intel<\/p>\n

Intel\u306f8\u67088\u65e5\u3001\u4e00\u90e8\u306eIntel\u88fd\u30d7\u30ed\u30bb\u30c3\u30b5\u306b\u3001\u60c5\u5831\u6f0f\u3048\u3044\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308b\u6f5c\u5728\u7684\u306a\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8106\u5f31\u6027\u304c\u5b58\u5728\u3059\u308b\u3053\u3068\u3092\u767a\u8868<\/a>\u3057\u307e\u3057\u305f\u3002<\/p>\n

\u3053\u306e\u8106\u5f31\u6027\u306f\u300cDownfall<\/a>(CVE-2022-40982)\u300d\u3042\u308b\u3044\u306f\u300cGDS(Gather Data Sampling\u300d\u3068\u547c\u3070\u308c\u3001\u6700\u65b0\u4e16\u4ee3\u306e\u30d7\u30ed\u30bb\u30c3\u30b5\u306f\u5f71\u97ff\u3092\u53d7\u3051\u306a\u3044\u3082\u306e\u306e\u3001\u300cSkylake\u300d(2015\u5e74\u767a\u58f2\u306e\u7b2c6\u4e16\u4ee3\u30d7\u30ed\u30bb\u30c3\u30b5)\u304b\u3089\u3001\u300cTiger Lake\u300d(2020\u5e74\u767a\u58f2\u306e\u7b2c11\u4e16\u4ee3Core\u30d7\u30ed\u30bb\u30c3\u30b5)\u306b\u5f71\u97ff\u3057\u307e\u3059\u3002<\/p>\n

\"S<\/p>\n

Downfall\u306f\u30cf\u30fc\u30c9\u30a6\u30a7\u30a2\u5185\u90e8\u306e\u30ec\u30b8\u30b9\u30bf\u306e\u5185\u5bb9\u3092\u610f\u56f3\u305b\u305a\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u306b\u516c\u958b\u3057\u3066\u3057\u307e\u3046\u30e1\u30e2\u30ea\u6700\u9069\u5316\u6a5f\u80fd\u306b\u95a2\u9023\u3057\u305f\u8106\u5f31\u6027\u3067\u3059\u3002AVX\u306eGATHER\u547d\u4ee4\u304c\u3001\u6295\u6a5f\u7684\u5b9f\u884c\u4e2d\u306b\u5185\u90e8\u30d9\u30af\u30bf\u30fb\u30ec\u30b8\u30b9\u30bf\u30fb\u30d5\u30a1\u30a4\u30eb\u306e\u5185\u5bb9\u3092\u6f0f\u6d29\u3055\u305b\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3068\u306e\u3053\u3068\u3067\u3059\u3002<\/p>\n

\u8106\u5f31\u6027\u306fGoogle\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u7814\u7a76\u8005\u3001Daniel Moghimi\u6c0f\u306b\u3088\u3063\u3066\u767a\u898b\u3055\u308c\u3001\u540c\u6c0f\u306fDownfall\u306e\u30c7\u30e2\u30b3\u30fc\u30c9\u3092\u4f5c\u6210\u3057\u3001128\u30d3\u30c3\u30c8\u304a\u3088\u3073256\u30d3\u30c3\u30c8\u306eAES\u30ad\u30fc\u304c\u76d7\u307f\u51fa\u305b\u308b\u3053\u3068\u3084\u3001Linux\u30ab\u30fc\u30cd\u30eb\u304b\u3089\u4efb\u610f\u306e\u30c7\u30fc\u30bf\u3092\u76d7\u307f\u51fa\u305b\u308b\u3053\u3068\u3092\u5b9f\u8a3c\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n

\"S<\/p>\n

Intel\u306f\u3053\u306e\u554f\u984c\u306b\u5bfe\u3059\u308b\u30de\u30a4\u30af\u30ed\u30b3\u30fc\u30c9\u3092\u30ea\u30ea\u30fc\u30b9\u3057\u307e\u3057\u305f\u304c\u3001\u7de9\u548c\u7b56\u3092\u9069\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u30d7\u30ed\u30bb\u30c3\u30b5\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u5927\u304d\u306a\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u4e8b\u3092\u8a8d\u3081\u3066\u3044\u307e\u3059\u3002\u7279\u306b\u3001AVX2\/AVX-512\u304c\u30d9\u30af\u30c8\u30eb\u5316\u3092\u591a\u7528\u3059\u308b\u30ef\u30fc\u30af\u30ed\u30fc\u30c9\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u3053\u3068\u304b\u3089\u3001HPC\u3001\u30d3\u30c7\u30aa\u30a8\u30f3\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\/\u30c8\u30e9\u30f3\u30b9\u30b3\u30fc\u30c7\u30a3\u30f3\u30b0\u3001AI\u306a\u3069\u3055\u307e\u3056\u307e\u306a\u5206\u91ce\u306b\u5f71\u97ff\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n

Intel\u306f\u30ef\u30fc\u30af\u30ed\u30fc\u30c9\u306b\u3088\u3063\u3066\u306f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306b\u6700\u592750%\u306e\u5f71\u97ff\u3092\u4e0e\u3048\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3068\u3057\u3001Downfall\u306e\u5f71\u97ff\u3092\u53d7\u3051\u306a\u3044\u5834\u5408\u3001\u30de\u30a4\u30af\u30ed\u30b3\u30fc\u30c9\u306e\u5909\u66f4\u3092\u30aa\u30d5\u306b\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u308b\u3068\u4f1d\u3048\u3066\u3044\u307e\u3059\u3002Intel\u306f\u3001\u5b9f\u74b0\u5883\u3067Downfall\u653b\u6483\u3092\u6210\u529f\u3055\u305b\u308b\u306e\u306f\u975e\u5e38\u306b\u56f0\u96e3\u3060\u3068\u8003\u3048\u3066\u3044\u308b\u3088\u3046\u3067\u3059\u304c\u3001\u305d\u308c\u304c\u771f\u5b9f\u304b\u3069\u3046\u304b\u306f\u3001\u8b70\u8ad6\u306e\u4f59\u5730\u6b8b\u3055\u308c\u3066\u3044\u307e\u3059\u3002Phoronix<\/a>\u306fDownfall\u306b\u7de9\u548c\u7b56\u3092\u9069\u7528\u3057\u305f\u5834\u5408\u306e\u521d\u671f\u30d9\u30f3\u30c1\u30de\u30fc\u30af\u3092\u5b9f\u65bd\u3057\u300150%\u3082\u306e\u30da\u30ca\u30eb\u30c6\u30a3\u306f\u78ba\u8a8d\u3067\u304d\u306a\u3044\u3082\u306e\u306e\u3001\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u5927\u304d\u304f\u60aa\u5316\u3059\u308b\u30ef\u30fc\u30af\u30ed\u30fc\u30c9\u304c\u5b58\u5728\u3059\u308b\u3053\u3068\u304c\u78ba\u8a8d\u3067\u304d\u305f\u3068\u5831\u544a\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n

2018\u5e74\u306b\u767a\u898b\u3055\u308c\u305fCPU\u306e\u8106\u5f31\u6027\u300cSpectre\u300d\u300cMeltdown\u300d\u3067\u306f\u3001\u7de9\u548c\u7b56\u306e\u9069\u7528\u306b\u3088\u3063\u3066\u30d7\u30ed\u30bb\u30c3\u30b5\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u304c\u4f4e\u4e0b\u3059\u308b\u3053\u3068\u304c\u554f\u984c\u3068\u306a\u308a\u307e\u3057\u305f\u3002\u4eca\u56de\u306e\u300cDownfall\u300d\u3067\u3082\u540c\u3058\u3088\u3046\u306a\u72b6\u6cc1\u304c\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"

Intel\u306f8\u67088\u65e5\u3001\u4e00\u90e8\u306eIntel\u88fd\u30d7\u30ed\u30bb\u30c3\u30b5\u306b\u3001\u60c5\u5831\u6f0f\u3048\u3044\u3092\u5f15\u304d\u8d77\u3053\u3059\u53ef\u80fd\u6027\u304c\u3042\u308b\u6f5c\u5728\u7684\u306a\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u8106\u5f31\u6027\u304c\u5b58\u5728\u3059\u308b\u3053\u3068\u3092\u767a\u8868\u3057\u307e\u3057\u305f\u3002 \u3053\u306e\u8106\u5f31\u6027\u306f\u300cDownfall(CVE-2022-40982)\u300d\u3042\u308b\u3044\u306f\u300c […]<\/p>\n","protected":false},"author":2,"featured_media":112902,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"swell_btn_cv_data":"","footnotes":""},"categories":[24],"tags":[531],"class_list":["post-112901","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-hard","tag-intel"],"_links":{"self":[{"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/posts\/112901","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/comments?post=112901"}],"version-history":[{"count":0,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/posts\/112901\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/media\/112902"}],"wp:attachment":[{"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/media?parent=112901"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/categories?post=112901"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/softantenna.com\/blog\/wp-json\/wp\/v2\/tags?post=112901"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}