{"id":6251,"date":"2026-03-31T16:30:08","date_gmt":"2026-03-31T16:30:08","guid":{"rendered":"https:\/\/powderkegtech.com\/?p=6251"},"modified":"2026-04-11T05:26:27","modified_gmt":"2026-04-11T05:26:27","slug":"libpng-vulnerability-cve-2026-33416","status":"publish","type":"post","link":"https:\/\/powderkegtech.com\/ja\/libpng-vulnerability-cve-2026-33416\/","title":{"rendered":"libpng \u306e Use-After-Free \u8106\u5f31\u6027\uff08CVE-2026-33416\uff09\u3092\u5f53\u793e\u30a8\u30f3\u30b8\u30cb\u30a2\u304c\u767a\u898b\uff01"},"content":{"rendered":"\n

\u3053\u306e\u305f\u3073\u3001\u5f53\u793e\u30a8\u30f3\u30b8\u30cb\u30a2\u304c\u753b\u50cf\u51e6\u7406\u30e9\u30a4\u30d6\u30e9\u30ea libpng \u306b\u5b58\u5728\u3059\u308b\u8106\u5f31\u6027\u3092\u767a\u898b\u3057\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30a2\u30c9\u30d0\u30a4\u30b6\u30ea\u3068\u3057\u3066\u516c\u958b\u3055\u308c\u307e\u3057\u305f\u3002
\u672c\u8106\u5f31\u6027\u306e\u30b5\u30de\u30ea\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002<\/p>\n\n\n\n

<\/i>

libpng \u8106\u5f31\u6027\uff08CVE-2026-33416\uff09\u306e\u30b5\u30de\u30ea<\/h4><\/div>
\n

Advisory:<\/strong> GHSA-m4pc-p4q3-4c7j<\/a>
CVE:<\/strong> CVE-2026-33416
CVSSv3:<\/strong> 7.5
CWE:<\/strong> CWE-416\uff08\u89e3\u653e\u5f8c\u30e1\u30e2\u30ea\u306e\u4f7f\u7528\uff1aUser-After-Free\uff09
\u5f71\u97ff\u5ea6:<\/strong> High
\u5f71\u97ff\u7bc4\u56f2:<\/strong> libpng 1.2.1 \uff5e 1.6.55
\u653b\u6483\u30d9\u30af\u30c8\u30eb:<\/strong> \u30ea\u30e2\u30fc\u30c8\u304b\u3089\u653b\u6483\u53ef\u80fd\uff08\u7d30\u5de5\u3057\u305f PNG \u753b\u50cf\u3092\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3059\u308b\u7b49\u306b\u3088\u308a\u653b\u6483\uff09<\/p>\n<\/div><\/div>\n\n\n\n

\u672c\u8106\u5f31\u6027\u306f Use-After-Free\uff08\u89e3\u653e\u5f8c\u30e1\u30e2\u30ea\u4f7f\u7528\uff09\u306b\u5206\u985e\u3055\u308c\u308b\u8106\u5f31\u6027\u3067\u3001\u7d30\u5de5\u3055\u308c\u305f PNG \u753b\u50cf\u3092\u51e6\u7406\u3059\u308b\u3053\u3068\u3067\u3001\u60c5\u5831\u6f0f\u3048\u3044\u3084\u4efb\u610f\u30b3\u30fc\u30c9\u5b9f\u884c\u306b\u3064\u306a\u304c\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002
libpng \u306f\u3001\u4e16\u754c\u4e2d\u306e\u30bd\u30d5\u30c8\u30a6\u30a7\u30a2\u3067\u5229\u7528\u3055\u308c\u3066\u3044\u308b\u975e\u5e38\u306b\u5e83\u304f\u666e\u53ca\u3057\u3066\u3044\u308b\u30e9\u30a4\u30d6\u30e9\u30ea\u3067\u3042\u308a\u3001\u672c\u8106\u5f31\u6027\u306f\u591a\u304f\u306e\u30b7\u30b9\u30c6\u30e0\u306b\u5f71\u97ff\u3059\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

\u653b\u6483\u306e\u30a4\u30e1\u30fc\u30b8<\/h2>\n\n\n\n

\u653b\u6483\u8005\u306f\u3001\u7d30\u5de5\u3055\u308c\u305fPNG\u753b\u50cf\u3092\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3055\u305b\u308b\u3053\u3068\u3067\u653b\u6483\u304c\u53ef\u80fd\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n

\n
\"\"<\/figure>\n<\/div>\n\n\n


\u653b\u6483\u306e\u6d41\u308c\u3092\u7c21\u5358\u306b\u793a\u3059\u3068\u3001\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u624b\u9806\u306e\uff13\uff5e\uff16\u306e\u90e8\u5206\u304c\u767a\u898b\u3057\u305f libpng \u306e\u8106\u5f31\u6027\u306e\u7b87\u6240\u3068\u306a\u308a\u3001\u4e0a\u8a18\u306e\u56f3\u304c\u305d\u306e\u8106\u5f31\u6027\u306e\u4ed5\u7d44\u307f\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n

\u3000\uff11\uff0e\u653b\u6483\u8005\u304c\u7d30\u5de5\u3057\u305fPNG\u753b\u50cf\u3092\u4f5c\u6210
\u3000\uff12\uff0eWeb\u30b5\u30a4\u30c8\u3084\u30b7\u30b9\u30c6\u30e0\u306b\u753b\u50cf\u3092\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9
\u3000\uff13\uff0e\u30b5\u30fc\u30d0\u5074\u3067 libpng \u304c\u753b\u50cf\u3092\u51e6\u7406
\u3000\uff14\uff0eUse-After-Free \u304c\u767a\u751f
\u3000\uff15\uff0e\u30e1\u30e2\u30ea\u7834\u58ca
\u3000\uff16\uff0e\u60c5\u5831\u6f0f\u3048\u3044\u307e\u305f\u306f\u4efb\u610f\u30b3\u30fc\u30c9\u5b9f\u884c<\/strong>

\u3064\u307e\u308a\u3001\u653b\u6483\u8005\u306f\u3001\u7d30\u5de5\u3055\u308c\u305fPNG\u753b\u50cf\u3092\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3055\u305b\u308b\u3053\u3068\u3067\u653b\u6483\u304c\u53ef\u80fd\u3068\u306a\u308a\u3001\u6b21\u306e\u3088\u3046\u306a\u300c\u753b\u50cf\u3092\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9\u3067\u304d\u308b\u6a5f\u80fd\u300d\u304c\u653b\u6483\u306e\u5165\u53e3\u306b\u306a\u308a\u307e\u3059\u3002

\u3000\u30fb\u30d7\u30ed\u30d5\u30a3\u30fc\u30eb\u753b\u50cf\u30a2\u30c3\u30d7\u30ed\u30fc\u30c9
\u3000\u30fb\u304a\u554f\u3044\u5408\u308f\u305b\u30d5\u30a9\u30fc\u30e0\u306e\u753b\u50cf\u6dfb\u4ed8
\u3000\u30fb\u30b5\u30e0\u30cd\u30a4\u30eb\u751f\u6210
\u3000\u30fb\u30c1\u30e3\u30c3\u30c8\u306e\u753b\u50cf\u9001\u4fe1
\u3000\u30fb\u30e1\u30fc\u30eb\u6dfb\u4ed8\u753b\u50cf
\u3000\u30fbAI \u306e\u753b\u50cf\u751f\u6210\u30fb\u89e3\u6790
\u3000\u30fb\u76e3\u8996\u30ab\u30e1\u30e9\u753b\u50cf\u51e6\u7406
\u3000\u30fb\u533b\u7642\u753b\u50cf\u30b7\u30b9\u30c6\u30e0<\/strong><\/p>\n\n\n\n

\u8106\u5f31\u6027\u767a\u898b\u304b\u3089\u516c\u958b\u307e\u3067<\/h2>\n\n\n\n

\u5f53\u793e\u30a8\u30f3\u30b8\u30cb\u30a2\u306f\u3001<\/p>\n\n\n\n

\u3000\uff11\uff0e\u8106\u5f31\u6027\u306e\u767a\u898b
\u3000\uff12\uff0ePoC\uff08Proof of Concept\uff09\u30b3\u30fc\u30c9\u306e\u4f5c\u6210
\u3000\uff13\uff0e\u653b\u6483\u6210\u7acb\u306e\u691c\u8a3c<\/strong><\/p>\n\n\n\n

\u307e\u3067\u3092\u5b9f\u65bd\u3057\u3001\u672c\u8106\u5f31\u6027\u306e\u8a73\u7d30\u3092 libpng \u306e\u7ba1\u7406\u8005\u3078\u5831\u544a\u3057\u307e\u3057\u305f\u3002
\u305d\u306e\u5f8c\u3001\u7ba1\u7406\u8005\u304a\u3088\u3073\u958b\u767a\u8005\u3068\u9023\u643a\u3057\u306a\u304c\u3089\u4fee\u6b63\u5bfe\u5fdc\u304c\u9032\u3081\u3089\u308c\u3001\u672c\u8106\u5f31\u6027\u304c\u516c\u958b\u3055\u308c\u307e\u3057\u305f\u3002

\u5f53\u793e\u3067\u306f\u3001\u6b21\u306e\u3088\u3046\u306a\u6280\u8853\u9818\u57df\u306e\u7814\u7a76\u30fb\u958b\u767a\u3092\u884c\u3063\u3066\u304a\u308a\u3001\u3053\u3046\u3057\u305f\u7814\u7a76\u958b\u767a\u6d3b\u52d5\u306e\u4e2d\u3067\u672c\u8106\u5f31\u6027\u3082\u767a\u898b\u3055\u308c\u307e\u3057\u305f\u3002<\/p>\n\n\n\n

\u3000\u30fb\u30bc\u30ed\u30c7\u30a4\u8106\u5f31\u6027\u306e\u52b9\u7387\u7684\u306a\u8abf\u67fb\u30fb\u767a\u898b
\u3000\u30fb\u30da\u30cd\u30c8\u30ec\u30fc\u30b7\u30e7\u30f3\u30c6\u30b9\u30c8\u81ea\u52d5\u5316
\u3000\u30fbOT\/IoT \u5206\u91ce\u306e\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56
\u3000\u30fbEDR \u7b49\u3092\u56de\u907f\u3059\u308b\u9ad8\u5ea6\u306a\u653b\u6483\u624b\u6cd5\u306e\u8abf\u67fb\u30fb\u7814\u7a76
\u3000\u30fbLLM \u3092\u6d3b\u7528\u3057\u305f\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u5bfe\u7b56<\/strong><\/p>\n\n\n\n

MUSHIKAGO \u3068\u5f53\u793e\u306e\u53d6\u7d44\u307f\u306b\u3064\u3044\u3066<\/h2>\n\n\n\n

\u5f53\u793e\u88fd\u54c1\u3067\u3042\u308b\u300cMUSHIKAGO\u300d\u3067\u306f\u3001\u30da\u30cd\u30c8\u30ec\u30fc\u30b7\u30e7\u30f3\u30c6\u30b9\u30c8\u81ea\u52d5\u5316\u3092\u4e3b\u8ef8\u3068\u3057\u305f\u3001\u9ad8\u5ea6\u306a\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u691c\u8a3c\u304c\u5b9f\u8a3c\u3067\u304d\u307e\u3059\u3002
\u672c\u8a18\u4e8b\u306e\u8106\u5f31\u6027\u3092\u767a\u898b\u3059\u308b\u6280\u8853\u529b\u3092\u6301\u3064\u30a8\u30f3\u30b8\u30cb\u30a2\u3068\u3001\u304a\u5ba2\u3055\u307e\u306e\u58f0\u3084\u8981\u671b\u3092\u8aa0\u5b9f\u306b\u89e3\u6c7a\u3059\u308b\u55b6\u696d\u30e1\u30f3\u30d0\u30fc\u304c\u4e00\u4e38\u3068\u306a\u308a\u3001\u9032\u5316\u3059\u308b\u30b5\u30a4\u30d0\u30fc\u653b\u6483\u306b\u9045\u308c\u308b\u3053\u3068\u306a\u304f\u3001\u5148\u56de\u308a\u3057\u3066\u5bfe\u7b56\u3059\u308b\u88fd\u54c1\u30fb\u30b5\u30fc\u30d3\u30b9\u3092\u4eca\u5f8c\u3082\u63d0\u4f9b\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n

\u53c2\u8003<\/h2>\n\n\n\n
    \n
  1. https:\/\/github.com\/pnggroup\/libpng\/security\/advisories\/GHSA-m4pc-p4q3-4c7j<\/a><\/li>\n\n\n\n
  2. https:\/\/www.cve.org\/CVERecord?id=CVE-2026-33416<\/a><\/li>\n\n\n\n
  3. https:\/\/nvd.nist.gov\/vuln\/detail\/CVE-2026-33416<\/a><\/li>\n\n\n\n
  4. https:\/\/gbhackers.com\/png-vulnerabilities-leak-sensitive-data\/<\/a><\/li>\n<\/ol>\n\n\n\n

    <\/p>\n","protected":false},"excerpt":{"rendered":"

    \u3053\u306e\u305f\u3073\u3001\u5f53\u793e\u30a8\u30f3\u30b8\u30cb\u30a2\u304c\u753b\u50cf\u51e6\u7406\u30e9\u30a4\u30d6\u30e9\u30ea libpng \u306b\u5b58\u5728\u3059\u308b\u8106\u5f31\u6027\u3092\u767a\u898b\u3057\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u30a2\u30c9\u30d0\u30a4\u30b6\u30ea\u3068\u3057\u3066\u516c\u958b\u3055\u308c\u307e\u3057\u305f\u3002\u672c\u8106\u5f31\u6027\u306e\u30b5\u30de\u30ea\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002 \u672c\u8106\u5f31\u6027\u306f Use-After-Free\uff08\u89e3\u653e\u5f8c\u30e1\u30e2 […]<\/p>\n","protected":false},"author":1,"featured_media":6253,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_locale":"ja","_original_post":"https:\/\/powderkegtech.com\/?p=6251","_vk_print_noindex":"","sitemap_hide":"","_veu_custom_css":"","veu_display_promotion_alert":"common","vkexunit_cta_each_option":"","_lightning_design_setting":{"layout":"default"},"footnotes":""},"categories":[79,81],"tags":[],"class_list":["post-6251","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-79","category-81","ja"],"acf":[],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/powderkegtech.com\/wp-json\/wp\/v2\/posts\/6251","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/powderkegtech.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/powderkegtech.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/powderkegtech.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/powderkegtech.com\/wp-json\/wp\/v2\/comments?post=6251"}],"version-history":[{"count":10,"href":"https:\/\/powderkegtech.com\/wp-json\/wp\/v2\/posts\/6251\/revisions"}],"predecessor-version":[{"id":6268,"href":"https:\/\/powderkegtech.com\/wp-json\/wp\/v2\/posts\/6251\/revisions\/6268"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/powderkegtech.com\/wp-json\/wp\/v2\/media\/6253"}],"wp:attachment":[{"href":"https:\/\/powderkegtech.com\/wp-json\/wp\/v2\/media?parent=6251"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/powderkegtech.com\/wp-json\/wp\/v2\/categories?post=6251"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/powderkegtech.com\/wp-json\/wp\/v2\/tags?post=6251"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}