{"id":968,"date":"2026-05-01T13:36:14","date_gmt":"2026-05-01T04:36:14","guid":{"rendered":"https:\/\/www.hpc.co.jp\/support\/?page_id=968"},"modified":"2026-05-01T13:36:14","modified_gmt":"2026-05-01T04:36:14","slug":"cve-2026-31431","status":"publish","type":"page","link":"https:\/\/www.hpc.co.jp\/support\/cve-2026-31431\/","title":{"rendered":"Linux\u30ab\u30fc\u30cd\u30eb\u8106\u5f31\u6027\uff08CVE-2026-31431\uff09\u306e\u5bfe\u51e6\u65b9\u6cd5"},"content":{"rendered":"<div id=\"page_head\" class=\"security_rick\">\n<div class=\"inviewfadeIn animated\">\n<div class=\"top_title_en\">Security Risk<\/div>\n<h1 class=\"top_title_jp\">\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30ea\u30b9\u30af\u5bfe\u7b56 \u7279\u8a2d\u30da\u30fc\u30b8<\/h1>\n<\/div>\n<\/div>\n<div id=\"page_container\">\n<div class=\"pnkz\"><!-- Breadcrumb NavXT 6.2.1 --><br \/>\n<a href=\"https:\/\/www.hpc.co.jp\">\u30db\u30fc\u30e0<\/a> &gt; <a href=\"https:\/\/www.hpc.co.jp\/support\">\u30b5\u30dd\u30fc\u30c8<\/a> &gt; <a href=\"https:\/\/www.hpc.co.jp\/support\/faq\/\">\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30ea\u30b9\u30af\u5bfe\u7b56\u7279\u8a2d\u30da\u30fc\u30b8<\/a> &gt; Linux\u30ab\u30fc\u30cd\u30eb\u8106\u5f31\u6027\uff08CVE-2026-31431\uff09\u306e\u5bfe\u51e6\u65b9\u6cd5<\/div>\n<section class=\"container\">\n<div class=\"block\">\n<div class=\"top_content\">\n<h2 class=\"title_full\">Linux\u30ab\u30fc\u30cd\u30eb\u8106\u5f31\u6027\uff08CVE-2026-31431\uff09\u306e\u5bfe\u51e6\u65b9\u6cd5<\/h2>\n<\/div>\n<div class=\"innerWrap\">\n<div class=\"simple_area\">\n<p>Linux\u30ab\u30fc\u30cd\u30eb\u306e\u6697\u53f7\u5316\u6a5f\u80fd\u3092\u5229\u7528\u3059\u308bAPI\uff08AF_ALG\uff09\u306b\u304a\u3044\u3066\u3001\u30ed\u30fc\u30ab\u30eb\u7279\u6a29\u6607\u683c\u306e\u8106\u5f31\u6027\uff08CVE-2026-31431\uff09\u304c\u767a\u898b\u3055\u308c\u307e\u3057\u305f\u3002\u672c\u8106\u5f31\u6027\u306f\u3001\u975e\u7279\u6a29\u306e\u30ed\u30fc\u30ab\u30eb\u30e6\u30fc\u30b6\u30fc\u304croot\u6a29\u9650\u3092\u53d6\u5f97\u53ef\u80fd\u306a\u6975\u3081\u3066\u6df1\u523b\u306a\u554f\u984c\u3067\u3059\u30022026\u5e744\u670829\u65e5\u306b\u516c\u958b\u3055\u308c\u305f\u672c\u8106\u5f31\u6027\u306b\u3064\u3044\u3066\u3001\u5f0a\u793e\u30b5\u30fc\u30d0\u88fd\u54c1\u306e\u5bfe\u5fdc\u72b6\u6cc1\u3068\u5bfe\u51e6\u65b9\u6cd5\u3092\u3054\u6848\u5185\u3044\u305f\u3057\u307e\u3059\u3002<br \/>\n\u8a73\u7d30\u306b\u3064\u3044\u3066\u306f\u4ee5\u4e0bURL\u3092\u3054\u78ba\u8a8d\u304f\u3060\u3055\u3044\u3002<\/p>\n<ul>\n<li><a href=\"https:\/\/nvd.nist.gov\/vuln\/detail\/CVE-2026-31431\">https:\/\/nvd.nist.gov\/vuln\/detail\/CVE-2026-31431<\/a><\/li>\n<li><a href=\"https:\/\/copy.fail\/\">https:\/\/copy.fail\/<\/a><\/li>\n<li><a href=\"https:\/\/access.redhat.com\/security\/cve\/CVE-2026-31431\">https:\/\/access.redhat.com\/security\/cve\/CVE-2026-31431<\/a><\/li>\n<li><a href=\"https:\/\/ubuntu.com\/security\/CVE-2026-31431\">https:\/\/ubuntu.com\/security\/CVE-2026-31431<\/a><\/li>\n<\/ul>\n<h2>\u8106\u5f31\u6027\u306e\u6982\u8981<\/h2>\n<p>Linux\u30ab\u30fc\u30cd\u30eb\u306e\u6697\u53f7\u30bd\u30b1\u30c3\u30c8\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\uff08algif_aead\uff09\u306b\u304a\u3044\u3066\u3001in-place\u64cd\u4f5c\u306e\u8a2d\u8a08\u4e0d\u5099\u306b\u3088\u308a\u3001\u975e\u7279\u6a29\u30e6\u30fc\u30b6\u30fc\u304c\u4efb\u610f\u306e\u30d5\u30a1\u30a4\u30eb\u306e\u30da\u30fc\u30b8\u30ad\u30e3\u30c3\u30b7\u30e5\u30924\u30d0\u30a4\u30c8\u66f8\u304d\u63db\u3048\u53ef\u80fd\u306a\u8106\u5f31\u6027\u304c\u5b58\u5728\u3057\u307e\u3059\u3002\u3053\u306e\u8106\u5f31\u6027\u3092\u60aa\u7528\u3059\u308b\u3053\u3068\u3067\u3001setuid\u30d0\u30a4\u30ca\u30ea\u306e\u30da\u30fc\u30b8\u30ad\u30e3\u30c3\u30b7\u30e5\u3092\u6539\u3056\u3093\u3057\u3001root\u6a29\u9650\u3092\u53d6\u5f97\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<ul>\n<li><strong>CVE\u756a\u53f7<\/strong>: CVE-2026-31431<\/li>\n<li><strong>\u6df1\u523b\u5ea6<\/strong>: CVSS v3.1 \u30b9\u30b3\u30a2 7.8\uff08High\uff09<\/li>\n<li><strong>\u653b\u6483\u6761\u4ef6<\/strong>: \u30ed\u30fc\u30ab\u30eb\u30e6\u30fc\u30b6\u30fc\u30a2\u30af\u30bb\u30b9\u304c\u5fc5\u8981\uff08\u30ea\u30e2\u30fc\u30c8\u653b\u6483\u4e0d\u53ef\uff09<\/li>\n<li><strong>\u5f71\u97ff<\/strong>: \u30ed\u30fc\u30ab\u30eb\u7279\u6a29\u6607\u683c\u3001\u30b3\u30f3\u30c6\u30ca\u30a8\u30b9\u30b1\u30fc\u30d7<\/li>\n<li><strong>\u5f71\u97ff\u671f\u9593<\/strong>: 2017\u5e74\u4ee5\u964d\u306b\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u305f\u307b\u307c\u5168\u3066\u306eLinux\u30c7\u30a3\u30b9\u30c8\u30ea\u30d3\u30e5\u30fc\u30b7\u30e7\u30f3<\/li>\n<\/ul>\n<p>\u672c\u8106\u5f31\u6027\u306f\u3001\u7af6\u5408\u72b6\u614b\u3084\u30ab\u30fc\u30cd\u30eb\u30d0\u30fc\u30b8\u30e7\u30f3\u4f9d\u5b58\u306e\u30aa\u30d5\u30bb\u30c3\u30c8\u7279\u5b9a\u3092\u5fc5\u8981\u3068\u3057\u306a\u3044\u76f4\u7dda\u7684\u306a\u8ad6\u7406\u30d0\u30b0\u3067\u3042\u308a\u3001732\u30d0\u30a4\u30c8\u306ePython\u30b9\u30af\u30ea\u30d7\u30c8\u3067\u5168\u30c7\u30a3\u30b9\u30c8\u30ea\u30d3\u30e5\u30fc\u30b7\u30e7\u30f3\u306b\u304a\u3044\u3066\u78ba\u5b9f\u306broot\u6a29\u9650\u3092\u53d6\u5f97\u53ef\u80fd\u3067\u3042\u308b\u3053\u3068\u304c\u5b9f\u8a3c\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<h3>\u5bfe\u8c61\u3068\u306a\u308b\u30ab\u30fc\u30cd\u30eb\u30d0\u30fc\u30b8\u30e7\u30f3<\/h3>\n<p>2017\u5e74\u306e\u30b3\u30df\u30c3\u30c8\uff0872548b093ee3\uff09\u4ee5\u964d\u3001\u4fee\u6b63\u30b3\u30df\u30c3\u30c8\uff08a664bf3d603d\uff09\u304c\u9069\u7528\u3055\u308c\u308b\u307e\u3067\u306e\u671f\u9593\u306b\u30d3\u30eb\u30c9\u3055\u308c\u305fLinux\u30ab\u30fc\u30cd\u30eb\u304c\u5bfe\u8c61\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<h2>\u5f0a\u793e\u30b5\u30fc\u30d0\u88fd\u54c1\u306e\u5bfe\u5fdc\u72b6\u6cc1\uff082026\u5e744\u670830\u65e5\u73fe\u5728\uff09<\/h2>\n<h3>Ubuntu LTS\uff0820.04 \/ 22.04 \/ 24.04\uff09<\/h3>\n<table style=\"border-collapse: collapse;width: 100%;height: 96px\" border=\"1\">\n<tbody>\n<tr style=\"height: 24px\">\n<th style=\"width: 20%;height: 24px\">\u30d0\u30fc\u30b8\u30e7\u30f3<\/th>\n<th style=\"width: 20%;height: 24px\">\u5bfe\u8c61\u30ab\u30fc\u30cd\u30eb<\/th>\n<th style=\"width: 20%;height: 24px\">\u30d1\u30c3\u30c1\u6e08\u307f\u30ab\u30fc\u30cd\u30eb<\/th>\n<th style=\"width: 20%;height: 24px\">\u66ab\u5b9a\u5bfe\u51e6<\/th>\n<th style=\"width: 20%;height: 24px\">\u30d1\u30c3\u30c1\u63d0\u4f9b\u72b6\u6cc1<\/th>\n<\/tr>\n<tr style=\"height: 24px\">\n<td style=\"width: 20%;height: 24px\">24.04 LTS<\/td>\n<td style=\"width: 20%;height: 24px\">6.8.0-110-generic\u4ee5\u524d<\/td>\n<td style=\"width: 20%;height: 24px\"><strong>\u672a\u30ea\u30ea\u30fc\u30b9<\/strong><\/td>\n<td style=\"width: 20%;height: 24px\"><strong>\u3042\u308a<\/strong>\uff08\u30e2\u30b8\u30e5\u30fc\u30eb\u7121\u52b9\u5316\uff09<\/td>\n<td style=\"width: 20%;height: 24px\">\u6a19\u6e96\u30b5\u30dd\u30fc\u30c8\u5185<\/td>\n<\/tr>\n<tr style=\"height: 24px\">\n<td style=\"width: 20%;height: 24px\">22.04 LTS<\/td>\n<td style=\"width: 20%;height: 24px\">5.15.0-176-generic\u4ee5\u524d<\/td>\n<td style=\"width: 20%;height: 24px\"><strong>\u672a\u30ea\u30ea\u30fc\u30b9<\/strong><\/td>\n<td style=\"width: 20%;height: 24px\"><strong>\u3042\u308a<\/strong>\uff08\u30e2\u30b8\u30e5\u30fc\u30eb\u7121\u52b9\u5316\uff09<\/td>\n<td style=\"width: 20%;height: 24px\">\u6a19\u6e96\u30b5\u30dd\u30fc\u30c8\u5185<\/td>\n<\/tr>\n<tr style=\"height: 24px\">\n<td style=\"width: 20%;height: 24px\">20.04 LTS<\/td>\n<td style=\"width: 20%;height: 24px\">5.4.0-228-generic\u4ee5\u524d<\/td>\n<td style=\"width: 20%;height: 24px\"><strong>\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u307e\u305b\u3093<\/strong><\/td>\n<td style=\"width: 20%;height: 24px\"><strong>\u3042\u308a<\/strong>\uff08\u30e2\u30b8\u30e5\u30fc\u30eb\u7121\u52b9\u5316\uff09<\/td>\n<td style=\"width: 20%;height: 24px\">ESM\u671f\u9593\uff08\u30d1\u30c3\u30c1\u63d0\u4f9b\u7d42\u4e86\uff09<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Ubuntu\u306e\u5168\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u304a\u3044\u3066\u3001<code>algif_aead<\/code>\u306f\u30ab\u30fc\u30cd\u30eb\u30e2\u30b8\u30e5\u30fc\u30eb\uff08<code>CONFIG_CRYPTO_USER_API_AEAD=m<\/code>\uff09\u3068\u3057\u3066\u30d3\u30eb\u30c9\u3055\u308c\u3066\u3044\u308b\u305f\u3081\u3001modprobe.d\u306b\u3088\u308b\u30e2\u30b8\u30e5\u30fc\u30eb\u7121\u52b9\u5316\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n<p>Ubuntu 20.04 LTS\u306f2025\u5e745\u6708\u306b\u6a19\u6e96\u30b5\u30dd\u30fc\u30c8\u304c\u7d42\u4e86\u3057\u3001\u73fe\u5728\u306fESM\uff08Extended Security Maintenance\uff09\u671f\u9593\u3067\u3059\u3002\u6a19\u6e96\u30b5\u30dd\u30fc\u30c8\u3067\u306e\u30ab\u30fc\u30cd\u30eb\u30d1\u30c3\u30c1\u63d0\u4f9b\u306f\u7d42\u4e86\u3057\u3066\u304a\u308a\u3001\u6839\u672c\u7684\u306a\u5bfe\u5fdc\u306b\u306fUbuntu 24.04 LTS\u4ee5\u964d\u3078\u306e\u30a2\u30c3\u30d7\u30b0\u30ec\u30fc\u30c9\u3092\u63a8\u5968\u3057\u307e\u3059\u3002<\/p>\n<h3>Red Hat Enterprise Linux 8 \/ 9<\/h3>\n<table style=\"border-collapse: collapse;width: 100%;height: 94px\" border=\"1\">\n<tbody>\n<tr style=\"height: 24px\">\n<th style=\"width: 50%;height: 24px\">\u9805\u76ee<\/th>\n<th style=\"width: 50%;height: 24px\">\u72b6\u6cc1<\/th>\n<\/tr>\n<tr style=\"height: 24px\">\n<td style=\"width: 50%;height: 24px\">\u30d1\u30c3\u30c1\u6e08\u307f\u30ab\u30fc\u30cd\u30eb<\/td>\n<td style=\"width: 50%;height: 24px\"><strong>\u672a\u30ea\u30ea\u30fc\u30b9<\/strong><\/td>\n<\/tr>\n<tr style=\"height: 22px\">\n<td style=\"width: 50%;height: 22px\">\u66ab\u5b9a\u5bfe\u51e6<\/td>\n<td style=\"width: 50%;height: 22px\"><strong>\u3042\u308a<\/strong>\uff08\u30d6\u30fc\u30c8\u30d1\u30e9\u30e1\u30fc\u30bf\u306b\u3088\u308balgif_aead\u7121\u52b9\u5316\u30fbRed Hat\u516c\u5f0f\u7de9\u548c\u7b56\uff09<\/td>\n<\/tr>\n<tr style=\"height: 24px\">\n<td style=\"width: 50%;height: 24px\">Red Hat CVE\u30b9\u30c6\u30fc\u30bf\u30b9<\/td>\n<td style=\"width: 50%;height: 24px\">Affected<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>RHEL 8\/9\u3067\u306f\u3001<code>CONFIG_CRYPTO_USER_API_AEAD=y<\/code>\uff08\u30ab\u30fc\u30cd\u30eb\u7d44\u307f\u8fbc\u307f\uff09\u3068\u3057\u3066\u30d3\u30eb\u30c9\u3055\u308c\u3066\u3044\u308b\u305f\u3081\u3001modprobe.d\u306b\u3088\u308b\u30e2\u30b8\u30e5\u30fc\u30eb\u7121\u52b9\u5316\u306f\u6a5f\u80fd\u3057\u307e\u305b\u3093\u3002Red Hat\u304c\u516c\u958b\u3057\u305f\u30d6\u30fc\u30c8\u30d1\u30e9\u30e1\u30fc\u30bf\u306b\u3088\u308b\u7de9\u548c\u7b56\u304c\u5229\u7528\u53ef\u80fd\u3067\u3059\uff08\u8a73\u7d30\u306f\u300c\u5bfe\u51e6\u65b9\u6cd5\u300d\u30bb\u30af\u30b7\u30e7\u30f3\u3092\u53c2\u7167\uff09\u3002<\/p>\n<p>\u4fee\u6b63\u63d0\u4f9b\u5bfe\u8c61\u5916\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\uff088.7\u30018.9\u7b49\uff09\u3092\u3054\u5229\u7528\u306e\u5834\u5408\u3067\u3001\u6b63\u5f0f\u306a\u30d1\u30c3\u30c1\u306e\u9069\u7528\u3092\u691c\u8a0e\u3055\u308c\u308b\u5fc5\u8981\u304c\u3042\u308b\u65b9\u306fOS\u306e\u30a2\u30c3\u30d7\u30b0\u30ec\u30fc\u30c9\u304c\u5fc5\u8981\u3067\u3059\u3002RHEL 8\u306e\u5834\u5408\u306f8.10\u3078\u306e\u3001RHEL 9\u306e\u5834\u5408\u306f9.6\u4ee5\u964d\u3078\u306e\u30a2\u30c3\u30d7\u30b0\u30ec\u30fc\u30c9\u3092\u63a8\u5968\u3057\u307e\u3059\u3002<\/p>\n<p>Red Hat\u306e\u516c\u5f0fCVE\u30da\u30fc\u30b8\u3067\u306f\u672c\u8106\u5f31\u6027\u306e\u66ab\u5b9a\u5bfe\u51e6\u3068\u3057\u3066\u30d6\u30fc\u30c8\u30d1\u30e9\u30e1\u30fc\u30bf\u306b\u3088\u308b\u7de9\u548c\u7b56\u304c\u516c\u958b\u3055\u308c\u3066\u3044\u307e\u3059\uff08<a href=\"https:\/\/access.redhat.com\/security\/cve\/cve-2026-31431\">https:\/\/access.redhat.com\/security\/cve\/cve-2026-31431<\/a>\uff09\u3002\u30d1\u30c3\u30c1\u6e08\u307f\u30ab\u30fc\u30cd\u30eb\u306e\u30ea\u30ea\u30fc\u30b9\u72b6\u6cc1\u306fRed Hat\u306eErrata\u30da\u30fc\u30b8\uff08<a href=\"https:\/\/access.redhat.com\/errata\/\">https:\/\/access.redhat.com\/errata\/<\/a>\uff09\u3067\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3>Red Hat Enterprise Linux 6 \/ 7<\/h3>\n<p>\u5f71\u97ff\u5bfe\u8c61\u5916\uff08Not affected\uff09\u3067\u3059\u3002\u30ab\u30fc\u30cd\u30eb\u306b<code>CONFIG_CRYPTO_USER_API_AEAD<\/code>\u304c\u542b\u307e\u308c\u3066\u3044\u306a\u3044\u305f\u3081\u3001\u8106\u5f31\u6027\u306e\u524d\u63d0\u3068\u306a\u308b\u30b3\u30fc\u30c9\u30d1\u30b9\u304c\u5b58\u5728\u3057\u307e\u305b\u3093\u3002<\/p>\n<h2>\u5bfe\u51e6\u65b9\u6cd5<\/h2>\n<h3>Ubuntu LTS\uff0820.04 \/ 22.04 \/ 24.04\uff09\u306e\u5834\u5408 \u2014 \u66ab\u5b9a\u5bfe\u51e6<\/h3>\n<p>\u30d1\u30c3\u30c1\u6e08\u307f\u30ab\u30fc\u30cd\u30eb\u304c\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u308b\u307e\u3067\u306e\u9593\u3001\u4ee5\u4e0b\u306e\u624b\u9806\u3067<code>algif_aead<\/code>\u30e2\u30b8\u30e5\u30fc\u30eb\u3092\u7121\u52b9\u5316\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u3001\u8106\u5f31\u6027\u306e\u60aa\u7528\u3092\u9632\u6b62\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\uff081\uff09\u30e2\u30b8\u30e5\u30fc\u30eb\u7121\u52b9\u5316\u8a2d\u5b9a\u306e\u4f5c\u6210<\/p>\n<p>\u3000root\u3067\u8a08\u7b97\u6a5f\u306b\u30ed\u30b0\u30a4\u30f3\u3057\u3001\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<p><code># echo \"install algif_aead \/bin\/false\" &gt; \/etc\/modprobe.d\/disable-algif.conf<\/code><\/p>\n<p>\uff082\uff09\u73fe\u5728\u30ed\u30fc\u30c9\u3055\u308c\u3066\u3044\u308b\u30e2\u30b8\u30e5\u30fc\u30eb\u306e\u524a\u9664<\/p>\n<p><code># rmmod algif_aead 2&gt;\/dev\/null || true<\/code><\/p>\n<p>\uff083\uff09\u7121\u52b9\u5316\u306e\u78ba\u8a8d<\/p>\n<p>\u3000\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u3001\u30e2\u30b8\u30e5\u30fc\u30eb\u304c\u30ed\u30fc\u30c9\u3055\u308c\u3066\u3044\u306a\u3044\u3053\u3068\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<p><code># lsmod | grep algif<\/code><br \/>\n<code># modprobe algif_aead<\/code><br \/>\n<code>modprobe: ERROR: could not insert 'algif_aead': Operation not permitted<\/code><\/p>\n<p>\u4e0a\u8a18\u306e\u3088\u3046\u306b\u30a8\u30e9\u30fc\u304c\u8fd4\u3055\u308c\u308c\u3070\u3001\u7121\u52b9\u5316\u306f\u6b63\u5e38\u306b\u6a5f\u80fd\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<p>\uff084\uff09AF_ALG\u3092\u4f7f\u7528\u3059\u308b\u30d7\u30ed\u30bb\u30b9\u306e\u78ba\u8a8d<\/p>\n<p>\u672c\u66ab\u5b9a\u5bfe\u51e6\u306f\u3001dm-crypt\/LUKS\u3001IPsec\/XFRM\u3001kTLS\u3001OpenSSH\u3001OpenSSL\u7b49\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u8a2d\u5b9a\u306b\u306f\u5f71\u97ff\u3057\u307e\u305b\u3093\u3002AF_ALG\u3092\u660e\u793a\u7684\u306b\u4f7f\u7528\u3059\u308b\u30d7\u30ed\u30bb\u30b9\u304c\u5b58\u5728\u3057\u306a\u3044\u304b\u3001\u4ee5\u4e0b\u306e\u30b3\u30de\u30f3\u30c9\u3067\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<p><code># lsof | grep AF_ALG<\/code><\/p>\n<p>\u4f55\u3082\u51fa\u529b\u3055\u308c\u306a\u3051\u308c\u3070\u3001\u66ab\u5b9a\u5bfe\u51e6\u306b\u3088\u308b\u5f71\u97ff\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<h4>\u5f71\u97ff\u3092\u53d7\u3051\u308b\u53ef\u80fd\u6027\u306e\u3042\u308b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3<\/h4>\n<p>OpenSSL\u306eafalg\u30a8\u30f3\u30b8\u30f3\u3092\u660e\u793a\u7684\u306b\u6709\u52b9\u5316\u3057\u3066\u3044\u308b\u74b0\u5883\u3001\u307e\u305f\u306fAF_ALG\u30bd\u30b1\u30c3\u30c8\u3092\u76f4\u63a5\u30d0\u30a4\u30f3\u30c9\u3059\u308b\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001<code>algif_aead<\/code>\u306e\u7121\u52b9\u5316\u306b\u3088\u308a\u5f71\u97ff\u3092\u53d7\u3051\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002\u8a72\u5f53\u3059\u308b\u5834\u5408\u306f\u3001\u30e6\u30fc\u30b6\u30fc\u7a7a\u9593\u306e\u6697\u53f7\u30e9\u30a4\u30d6\u30e9\u30ea\uff08OpenSSL\u306e\u30c7\u30d5\u30a9\u30eb\u30c8\u30a8\u30f3\u30b8\u30f3\u7b49\uff09\u3078\u306e\u30d5\u30a9\u30fc\u30eb\u30d0\u30c3\u30af\u304c\u81ea\u52d5\u7684\u306b\u884c\u308f\u308c\u307e\u3059\u3002<\/p>\n<h3>Ubuntu LTS\uff0822.04 \/ 24.04\uff09\u306e\u5834\u5408 \u2014 \u30d1\u30c3\u30c1\u9069\u7528\uff08\u30ea\u30ea\u30fc\u30b9\u5f8c\uff09<\/h3>\n<p>Canonical\u304b\u3089\u30d1\u30c3\u30c1\u6e08\u307f\u30ab\u30fc\u30cd\u30eb\u304c\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u6b21\u7b2c\u3001\u3053\u306e\u7ae0\u306b\u52a0\u7b46\u3057\u307e\u3059\u3002<\/p>\n<h3>Red Hat Enterprise Linux 8 \/ 9 \u306e\u5834\u5408 \u2014 \u66ab\u5b9a\u5bfe\u51e6<\/h3>\n<p>RHEL\u3067\u306f<code>algif_aead<\/code>\u304c\u30ab\u30fc\u30cd\u30eb\u7d44\u307f\u8fbc\u307f\uff08<code>CONFIG_CRYPTO_USER_API_AEAD=y<\/code>\uff09\u3067\u3042\u308b\u305f\u3081\u3001Ubuntu\u306e\u3088\u3046\u306amodprobe.d\u306b\u3088\u308b\u30e2\u30b8\u30e5\u30fc\u30eb\u7121\u52b9\u5316\u306f\u3067\u304d\u307e\u305b\u3093\u3002Red Hat\u304c\u516c\u5f0f\u306b\u516c\u958b\u3057\u305f\u30d6\u30fc\u30c8\u30d1\u30e9\u30e1\u30fc\u30bf\u306b\u3088\u308b\u7de9\u548c\u7b56\u304c\u5229\u7528\u53ef\u80fd\u3067\u3059\uff08<a href=\"https:\/\/access.redhat.com\/security\/cve\/CVE-2026-31431\">https:\/\/access.redhat.com\/security\/cve\/CVE-2026-31431<\/a>\uff09\u3002<\/p>\n<p>\u4ee5\u4e0b\u306e\u3044\u305a\u308c\u304b\u306e\u30d6\u30fc\u30c8\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u8ffd\u52a0\u3059\u308b\u3053\u3068\u3067\u3001\u5f71\u97ff\u3092\u53d7\u3051\u308b\u6a5f\u80fd\u3092\u7121\u52b9\u5316\u3067\u304d\u307e\u3059\u3002<\/p>\n<table style=\"border-collapse: collapse;width: 100%\" border=\"1\">\n<tbody>\n<tr>\n<th style=\"width: 33.3333%\">\u30d6\u30fc\u30c8\u30d1\u30e9\u30e1\u30fc\u30bf<\/th>\n<th style=\"width: 33.3333%\">\u52b9\u679c<\/th>\n<th style=\"width: 33.3333%\">\u5f71\u97ff\u7bc4\u56f2<\/th>\n<\/tr>\n<tr>\n<td style=\"width: 33.3333%\"><code>initcall_blacklist=algif_aead_init<\/code><\/td>\n<td style=\"width: 33.3333%\">algif_aead\u306e\u307f\u7121\u52b9\u5316<\/td>\n<td style=\"width: 33.3333%\">\u6700\u5c0f\u9650\u3002AF_ALG\u306e\u4ed6\u6a5f\u80fd\uff08hash\/skcipher\/rng\uff09\u306f\u52d5\u4f5c<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 33.3333%\"><code>initcall_blacklist=af_alg_init<\/code><\/td>\n<td style=\"width: 33.3333%\">AF_ALG\u30a4\u30f3\u30bf\u30fc\u30d5\u30a7\u30fc\u30b9\u5168\u4f53\u3092\u7121\u52b9\u5316<\/td>\n<td style=\"width: 33.3333%\">\u5e83\u7bc4\u3002AF_ALG\u3092\u4f7f\u7528\u3059\u308b\u5168\u6a5f\u80fd\u304c\u52d5\u4f5c\u4e0d\u53ef<\/td>\n<\/tr>\n<tr>\n<td style=\"width: 33.3333%\"><code>initcall_blacklist=crypto_authenc_esn_module_init<\/code><\/td>\n<td style=\"width: 33.3333%\">authencesn\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u307f\u7121\u52b9\u5316<\/td>\n<td style=\"width: 33.3333%\">\u6700\u5c0f\u9650\u3002\u8106\u5f31\u6027\u306e\u30c8\u30ea\u30ac\u30fc\u3068\u306a\u308b\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u307f\u30d6\u30ed\u30c3\u30af<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u63a8\u5968\u306f<code>initcall_blacklist=algif_aead_init<\/code>\u3067\u3059\u3002\u8106\u5f31\u6027\u306e\u5bfe\u8c61\u3068\u306a\u308bAEAD\u6a5f\u80fd\u306e\u307f\u3092\u7121\u52b9\u5316\u3057\u3001AF_ALG\u306e\u4ed6\u6a5f\u80fd\u3078\u306e\u5f71\u97ff\u3092\u6700\u5c0f\u9650\u306b\u6291\u3048\u307e\u3059\u3002<\/p>\n<p>\uff081\uff09\u30d6\u30fc\u30c8\u30d1\u30e9\u30e1\u30fc\u30bf\u306e\u8ffd\u52a0<\/p>\n<p>root\u3067\u8a08\u7b97\u6a5f\u306b\u30ed\u30b0\u30a4\u30f3\u3057\u3001<code>grubby<\/code>\u30b3\u30de\u30f3\u30c9\u3092\u4f7f\u7528\u3057\u3066\u5168\u30ab\u30fc\u30cd\u30eb\u306b\u30d6\u30fc\u30c8\u30d1\u30e9\u30e1\u30fc\u30bf\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002BIOS\/UEFI\u306e\u533a\u5225\u306f\u4e0d\u8981\u3067\u3059\u3002<\/p>\n<p><code># grubby --update-kernel ALL --args=\"initcall_blacklist=algif_aead_init\"<\/code><\/p>\n<p>\uff082\uff09\u30b7\u30f3\u30dc\u30ea\u30c3\u30af\u30ea\u30f3\u30af\u306e\u5f37\u5236\u4f5c\u6210\uff08\u3053\u3053\u306fRed Hat Enterprise Linux 9\u3067\u306f\u4e0d\u8981\uff09<\/p>\n<p><code># cd \/boot\/grub2<\/code><\/p>\n<p><code># ln -sf ..\/efi\/EFI\/*\/grubenv<\/code><\/p>\n<p><code>*<\/code>\u00a0\u306e\u7b87\u6240\u306f OS \u4f9d\u5b58\u3067\u3059(<code>almalinux<\/code>, <code>redhat<\/code>, <code>rocky<\/code> \u7b49)\u3002\u30b7\u30f3\u30dc\u30ea\u30c3\u30af\u30ea\u30f3\u30af\u304c\u6b63\u3057\u304f\u8a2d\u7f6e\u3055\u308c\u3066\u3044\u306a\u3044\u5834\u5408\u3001\u8d77\u52d5\u6642\u306b\u6b63\u5e38\u306a\u30d1\u30e9\u30e1\u30fc\u30bf\u3067\u8d77\u52d5\u51fa\u6765\u306a\u3044\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\uff083\uff09grub.cfg\u306e\u66f4\u65b0\uff08\u3053\u3053\u306fRed Hat Enterprise Linux 9\u3067\u306f\u4e0d\u8981\uff09<\/p>\n<p><code># grub2-mkconfig -o \/boot\/efi\/EFI\/*\/grub.cfg<\/code><\/p>\n<p>\uff084\uff09\u518d\u8d77\u52d5<\/p>\n<p><code># reboot<\/code><\/p>\n<p>\uff085\uff09\u78ba\u8a8d<\/p>\n<p>\u518d\u8d77\u52d5\u5f8c\u3001\u30d6\u30fc\u30c8\u30d1\u30e9\u30e1\u30fc\u30bf\u304c\u53cd\u6620\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n<p><code># cat \/proc\/cmdline | grep initcall_blacklist<\/code><\/p>\n<p>\u307e\u305f\u3001AF_ALG\u306eAEAD\u6a5f\u80fd\u304c\u7121\u52b9\u5316\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u3092\u78ba\u8a8d\u3057\u307e\u3059\u3002<\/p>\n<p><code># python3 -c \"import socket; s=socket.socket(38,5,0); s.bind(('aead','authencesn(hmac(sha256),cbc(aes))'))\" 2&gt;&amp;1<\/code><\/p>\n<p>\u30a8\u30e9\u30fc\u304c\u8fd4\u3055\u308c\u308c\u3070\u3001AEAD\u6a5f\u80fd\u306f\u6b63\u5e38\u306b\u7121\u52b9\u5316\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<h4>\n\u6ce8\u610f\u4e8b\u9805<\/h4>\n<ul>\n<li>\u30ab\u30fc\u30cd\u30eb\u6697\u53f7\u95a2\u6570\u3092\u4f7f\u7528\u3059\u308b\u6a5f\u80fd\u306b\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3078\u306e\u5f71\u97ff\u304c\u51fa\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<li><code>crypto_authenc_esn_module_init<\/code>\u3092\u6307\u5b9a\u3059\u308b\u5834\u5408\u3001IPsec\u306eESN\u6a5f\u80fd\u306b\u5f71\u97ff\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/li>\n<li>\u30d1\u30c3\u30c1\u5bfe\u8c61\u5916\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\uff088.7\u30018.9\u7b49\uff09\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u30018.10\u3078\u306e\u30a2\u30c3\u30d7\u30b0\u30ec\u30fc\u30c9\u3092\u63a8\u5968\u3002<\/li>\n<li>RHEL 9.4\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u30019.6\u4ee5\u964d\u3078\u306e\u30a2\u30c3\u30d7\u30b0\u30ec\u30fc\u30c9\u3092\u63a8\u5968\u3002<\/li>\n<\/ul>\n<h3>Red Hat Enterprise Linux 8 \/ 9 \u306e\u5834\u5408 \u2014 \u30d1\u30c3\u30c1\u9069\u7528\uff08\u30ea\u30ea\u30fc\u30b9\u5f8c\uff09<\/h3>\n<p>Red Hat\u304b\u3089\u30d1\u30c3\u30c1\u6e08\u307f\u30ab\u30fc\u30cd\u30eb\u304c\u30ea\u30ea\u30fc\u30b9\u3055\u308c\u6b21\u7b2c\u3001\u3053\u306e\u7ae0\u306b\u52a0\u7b46\u3057\u307e\u3059\u3002<\/p>\n<h2>\n\u6ce8\u610f\u4e8b\u9805<\/h2>\n<ul>\n<li>\u672c\u66ab\u5b9a\u5bfe\u51e6\u304a\u3088\u3073\u5bfe\u51e6\u65b9\u6cd5\u306f\u3001\u304a\u5ba2\u69d8\u306e\u8cac\u4efb\u306b\u304a\u3044\u3066\u5b9f\u65bd\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/li>\n<li>\u672c\u4ef6\u306f\u5f0a\u793e\u4fdd\u8a3c\u5bfe\u8c61\u5916\u3068\u3055\u305b\u3066\u3044\u305f\u3060\u304d\u307e\u3059\u3002<\/li>\n<li>\u30d1\u30c3\u30c1\u306e\u30ea\u30ea\u30fc\u30b9\u72b6\u6cc1\u306f\u5404\u30c7\u30a3\u30b9\u30c8\u30ea\u30d3\u30e5\u30fc\u30bf\u30fc\u306e\u516c\u5f0f\u60c5\u5831\u3092\u3054\u78ba\u8a8d\u304f\u3060\u3055\u3044\u3002<\/li>\n<li>\u672c\u60c5\u5831\u306f2026\u5e744\u670830\u65e5\u73fe\u5728\u306e\u72b6\u6cc1\u306b\u57fa\u3065\u3044\u3066\u3044\u307e\u3059\u3002\u6700\u65b0\u60c5\u5831\u306f\u5404\u30c7\u30a3\u30b9\u30c8\u30ea\u30d3\u30e5\u30fc\u30bf\u30fc\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30a2\u30c9\u30d0\u30a4\u30b6\u30ea\u3092\u3054\u53c2\u7167\u304f\u3060\u3055\u3044\u3002<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/div>\n<\/section>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Security Risk \u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30ea\u30b9\u30af\u5bfe\u7b56 \u7279\u8a2d\u30da\u30fc\u30b8 \u30db\u30fc\u30e0 &gt; \u30b5\u30dd\u30fc\u30c8 &gt; \u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30ea\u30b9\u30af\u5bfe\u7b56\u7279\u8a2d\u30da\u30fc\u30b8 &gt; Linux\u30ab\u30fc\u30cd\u30eb\u8106\u5f31\u6027\uff08CVE-2026-31431\uff09\u306e\u5bfe\u51e6\u65b9\u6cd5 Lin&#8230;<\/p>\n","protected":false},"author":3,"featured_media":0,"parent":0,"menu_order":13,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-968","page","type-page","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - aioseo.com -->\n\t<meta name=\"description\" content=\"Security Risk \u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30ea\u30b9\u30af\u5bfe\u7b56 \u7279\u8a2d\u30da\u30fc\u30b8 \u30db\u30fc\u30e0 &gt; \u30b5\u30dd\u30fc\u30c8 &gt; \u30bb\u30ad\u30e5\u30ea\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" 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