{"id":39364,"date":"2026-07-02T09:57:55","date_gmt":"2026-07-02T01:57:55","guid":{"rendered":"https:\/\/www.deepin.org\/?p=39364"},"modified":"2026-07-02T10:24:51","modified_gmt":"2026-07-02T02:24:51","slug":"linux-kernel-actpedit-vulnerability-fix","status":"publish","type":"post","link":"https:\/\/www.deepin.org.cn\/zh\/linux-kernel-actpedit-vulnerability-fix\/","title":{"rendered":"\u7d27\u6025\u5b89\u5168\u66f4\u65b0 | Linux Kernel ActPedit \u672c\u5730\u63d0\u6743\u6f0f\u6d1e\u4fee\u590d\uff0c\u8bf7\u5c3d\u5feb\u5347\u7ea7\uff01"},"content":{"rendered":"<img loading=\"lazy\" class=\"alignnone size-full wp-image-39365\" src=\"https:\/\/www.deepin.org\/wp-content\/uploads\/2026\/07\/107_\u526f\u672c.png\" alt=\"\" width=\"900\" height=\"383\" srcset=\"https:\/\/www.deepin.org.cn\/wp-content\/uploads\/2026\/07\/107_\u526f\u672c.png 900w, https:\/\/www.deepin.org.cn\/wp-content\/uploads\/2026\/07\/107_\u526f\u672c-300x128.png 300w, https:\/\/www.deepin.org.cn\/wp-content\/uploads\/2026\/07\/107_\u526f\u672c-150x64.png 150w, https:\/\/www.deepin.org.cn\/wp-content\/uploads\/2026\/07\/107_\u526f\u672c-768x327.png 768w, https:\/\/www.deepin.org.cn\/wp-content\/uploads\/2026\/07\/107_\u526f\u672c-24x10.png 24w, https:\/\/www.deepin.org.cn\/wp-content\/uploads\/2026\/07\/107_\u526f\u672c-36x15.png 36w, https:\/\/www.deepin.org.cn\/wp-content\/uploads\/2026\/07\/107_\u526f\u672c-48x20.png 48w\" sizes=\"(max-width: 900px) 100vw, 900px\" \/><\/p>\n<p data-pm-slice=\"5 2 []\"><span data-font-family=\"default\">\ud83d\udd14\u00a0\u4eb2\u7231\u7684 deepin \u7528\u6237\u4e0e\u793e\u533a\u4f19\u4f34\u4eec\uff1a<\/span><\/p>\n<p data-pm-slice=\"0 0 []\">\u8fd1\u671f\uff0cLinux Kernel \u88ab\u62ab\u9732\u5b58\u5728\u672c\u5730\u6743\u9650\u63d0\u5347\u6f0f\u6d1e\uff0c\u4ee3\u53f7\u4e3a\u00a0<strong>ActPedit<\/strong>\uff08\u4e5f\u79f0\u00a0<strong>pedit COW<\/strong>\uff09\u3002\u8be5\u6f0f\u6d1e\u4e0e\u6b64\u524d\u00a0<a class=\"normal_text_link mp_article_text_link\" href=\"https:\/\/www.deepin.org\/zh\/linux-kernel-dirty-frag-vulnerability-fix\/\" target=\"_blank\" rel=\"noopener\" data-itemshowtype=\"0\" data-linktype=\"2\">Dirty Frag<\/a>\u3001<a class=\"normal_text_link mp_article_text_link\" href=\"https:\/\/www.deepin.org\/zh\/linux-kernel-copy-fail-vulnerability-fix\/\" target=\"_blank\" rel=\"noopener\" data-itemshowtype=\"0\" data-linktype=\"2\">Copy Fail<\/a>\u00a0\u5c5e\u4e8e\u540c\u4e00\u7c7b page cache \u5199\u5165\u98ce\u9669\u3002\u653b\u51fb\u8005\u5728\u5df2\u83b7\u5f97\u672c\u5730\u4f4e\u6743\u9650\u6267\u884c\u6761\u4ef6\u7684\u60c5\u51b5\u4e0b\uff0c\u53ef\u80fd\u5229\u7528\u8be5\u6f0f\u6d1e\u7be1\u6539\u53ea\u8bfb\u6587\u4ef6\u7684 page cache\uff0c\u8fdb\u4e00\u6b65\u63d0\u5347\u6743\u9650\u5e76\u83b7\u53d6 root \u6743\u9650\u3002<\/p>\n<p>\u76ee\u524d\u516c\u5f00\u8d44\u6599\u663e\u793a\uff0c\u8be5\u6f0f\u6d1e\u7684 PoC\uff08\u6982\u5ff5\u9a8c\u8bc1\u4ee3\u7801\uff09\u548c\u5229\u7528\u6280\u672f\u7ec6\u8282\u5df2\u516c\u5f00\u4f20\u64ad\u3002\u9274\u4e8e\u5176\u4e25\u91cd\u6027\u548c\u5e7f\u6cdb\u5f71\u54cd\uff0c\u4e3a\u786e\u4fdd\u60a8\u7684\u7cfb\u7edf\u5b89\u5168\uff0c\u6211\u4eec\u5f3a\u70c8\u5efa\u8bae\u6240\u6709\u7528\u6237\u5c3d\u5feb\u5347\u7ea7\u3002<\/p>\n<p>&nbsp;<\/p>\n<section data-pm-slice=\"0 0 []\">\n<section>\n<section>\n<section>\n<section>\n<section>\n<section>\n<section>\n<section>\n<section>\n<h1><strong>01 \u6f0f\u6d1e\u4fe1\u606f<\/strong><\/h1>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<p><strong>\u6f0f\u6d1e\u7f16\u53f7\uff1a\u00a0CVE-2026-46331<\/strong><\/p>\n<p><strong>\u6f0f\u6d1e\u4ee3\u53f7\uff1a\u00a0ActPedit\uff08pedit COW\uff09<\/strong><\/p>\n<p>\u6f0f\u6d1e\u63cf\u8ff0\uff1aLinux \u5185\u6838\u6d41\u91cf\u63a7\u5236\u5305\u7f16\u8f91\uff08pedit\uff09\u5b50\u7cfb\u7edf\u5b58\u5728\u672c\u5730\u6743\u9650\u63d0\u5347\u6f0f\u6d1e\u3002tcf\\_pedit\\_act() \u5728\u5904\u7406\u5199\u65f6\u590d\u5236\uff08COW\uff09\u65f6\uff0c\u672a\u5c06\u8fd0\u884c\u65f6\u5934\u90e8\u504f\u79fb\u91cf\u7eb3\u5165 skb\\_ensure\\_writable() \u7684\u5199\u5165\u8303\u56f4\u8ba1\u7b97\uff0c\u53ef\u80fd\u5bfc\u81f4\u90e8\u5206\u5199\u5165\u533a\u57df\u672a\u6b63\u786e COW\uff0c\u8fdb\u800c\u9020\u6210\u8d8a\u754c\u5199\u5165\u548c\u9875\u9762\u7f13\u5b58\u635f\u574f\u3002\u5177\u5907\u6d41\u91cf\u63a7\u5236\u89c4\u5219\u914d\u7f6e\u80fd\u529b\u7684\u672c\u5730\u653b\u51fb\u8005\uff0c\u53ef\u80fd\u5229\u7528\u8be5\u7f3a\u9677\u63d0\u5347\u6743\u9650\u6216\u5bfc\u81f4\u7cfb\u7edf\u5d29\u6e83\u3002<\/p>\n<p>\u6f0f\u6d1e\u7b49\u7ea7\uff1a\u9ad8\u5371\uff08CVSS 7.1-7.8\uff09<\/p>\n<p>\u5229\u7528\u6761\u4ef6\uff1a\u5185\u6838\u542f\u7528 CONFIG\\_NET\\_ACT\\_PEDIT\uff0c\u4e14\u653b\u51fb\u8005\u53ef\u901a\u8fc7\u672c\u5730\u6743\u9650\u8def\u5f84\u914d\u7f6e\u6d41\u91cf\u63a7\u5236\u89c4\u5219\uff1b\u5f53\u7cfb\u7edf\u542f\u7528\u7528\u6237\u547d\u540d\u7a7a\u95f4\uff08CONFIG\\_USER\\_NS=y\uff0c\u4e14 \/proc\/sys\/kernel\/unprivileged\\_userns\\_clone \u4e3a 1\uff09\u65f6\uff0c\u516c\u5f00 PoC \u5229\u7528\u98ce\u9669\u66f4\u9ad8\u3002\u6210\u529f\u5229\u7528\u540e\uff0c\u672c\u5730\u666e\u901a\u7528\u6237\u53ef\u76f4\u63a5\u83b7\u53d6\u7cfb\u7edf root \u6700\u9ad8\u6743\u9650\uff0c\u5b9e\u73b0\u5b8c\u5168\u63a7\u5236\u3002<\/p>\n<p><strong>\u5f71\u54cd\u8303\u56f4\uff1a\u6240\u6709\u672a\u66f4\u65b0\u672c\u6b21\u4fee\u590d\u7684 deepin 25 \u7528\u6237\u5747\u53d7\u5f71\u54cd\uff0c\u5efa\u8bae\u7acb\u5373\u66f4\u65b0\u5347\u7ea7\u3002<\/strong><\/p>\n<p>&nbsp;<\/p>\n<section data-pm-slice=\"0 0 []\">\n<section>\n<section>\n<section>\n<section>\n<section>\n<section>\n<section>\n<section>\n<section>\n<h1><strong>02 \u4fee\u590d\u8fdb\u5c55<\/strong><\/h1>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<\/section>\n<p><strong>deepin 25\uff086.6 \u53ca 6.18 \u5185\u6838\uff09<\/strong>\uff1a<\/p>\n<p>\u9488\u5bf9 deepin25 \u7684 ActPedit \u6f0f\u6d1e\u4fee\u590d\u66f4\u65b0\u5df2\u5b8c\u6210\u63a8\u9001 \uff0c\u8bf7\u5c3d\u5feb\u901a\u8fc7<strong>\u63a7\u5236\u4e2d\u5fc3\u66f4\u65b0<\/strong>\uff0c\u6216<strong>\u4f7f\u7528\u7ec8\u7aef\u547d\u4ee4\u5347\u7ea7<\/strong>\uff1a<\/p>\n<section class=\"code-snippet__fix code-snippet__js\">\n<ul class=\"code-snippet__line-index code-snippet__js\">\n<li><code><span class=\"code-snippet__built_in\">sudo<\/span>\u00a0apt update &amp;&amp;\u00a0<span class=\"code-snippet__built_in\">sudo<\/span> apt dist-upgrade<\/code><\/li>\n<\/ul>\n<\/section>\n<p data-pm-slice=\"0 0 []\"><strong>\u5347\u7ea7\u540e\u8bf7\u91cd\u542f\u7cfb\u7edf<\/strong>\u4ee5\u786e\u4fdd\u4fee\u590d\u751f\u6548\u3002<\/p>\n<p>&nbsp;<\/p>\n<h1><strong>\u5176\u5b83\u66f4\u65b0\uff1aDDE \u5df2\u77e5\u95ee\u9898\u4fee\u590d\u3002<\/strong><\/h1>\n<hr \/>\n<section><span data-pm-slice=\"0 0 []\">\u4ee5\u4e0a\u5c31\u662f\u672c\u6b21 deepin 25.1.1 \u6b63\u5f0f\u7248\u7684\u5168\u90e8\u66f4\u65b0\u5185\u5bb9\uff0c\u518d\u6b21\u611f\u8c22\u6bcf\u4e00\u4f4d deepin \u793e\u533a\u670b\u53cb\u7684\u652f\u6301\uff01<\/span><\/section>\n<p>&nbsp;<\/p>\n<section><span data-pm-slice=\"0 0 []\">\u5982\u60a8\u5728\u66f4\u65b0\u6216\u4f7f\u7528\u8fc7\u7a0b\u4e2d\u9047\u5230\u4efb\u4f55\u95ee\u9898\uff0c\u6b22\u8fce\u524d\u5f80<a class=\"weapp_text_link js_weapp_entry wx_tap_link js_wx_tap_highlight\" href=\"http:\/\/bbs.deepin.org\" data-unique-id=\"mr2v9ald-hcq9dy\" data-miniprogram-type=\"text\" data-miniprogram-appid=\"wxcf1a4dbefee5cb41\" data-miniprogram-path=\"pages\/index\/index\" data-miniprogram-nickname=\"deepin\u793e\u533a\u8bba\u575b\" data-miniprogram-servicetype=\"0\" data-miniprogram-applink=\"\">deepin\u793e\u533a\u8bba\u575b<\/a>\u00a0\u4ea4\u6d41\u53cd\u9988\u3002<\/span><\/section>","protected":false},"excerpt":{"rendered":"<p>\ud83d\udd14\u00a0\u4eb2\u7231\u7684 deepin \u7528\u6237\u4e0e\u793e\u533a\u4f19\u4f34\u4eec\uff1a \u8fd1\u671f\uff0cLinux Kernel \u88ab\u62ab\u9732\u5b58\u5728\u672c\u5730\u6743\u9650\u63d0\u5347\u6f0f\u6d1e\uff0c\u4ee3\u53f7\u4e3a\u00a0ActPedit\uff08\u4e5f\u79f0\u00a0pedit COW\uff09\u3002\u8be5\u6f0f\u6d1e\u4e0e\u6b64\u524d\u00a0Dirty Frag\u3001Copy Fail\u00a0\u5c5e\u4e8e\u540c\u4e00\u7c7b page cache \u5199\u5165\u98ce\u9669\u3002\u653b\u51fb\u8005\u5728\u5df2\u83b7\u5f97\u672c\u5730\u4f4e\u6743\u9650\u6267\u884c\u6761\u4ef6\u7684\u60c5\u51b5\u4e0b\uff0c\u53ef\u80fd\u5229\u7528\u8be5\u6f0f\u6d1e\u7be1\u6539\u53ea\u8bfb\u6587\u4ef6\u7684 page cache\uff0c\u8fdb\u4e00\u6b65\u63d0\u5347\u6743\u9650\u5e76\u83b7\u53d6 root \u6743\u9650\u3002 \u76ee\u524d\u516c ...<a href=https:\/\/www.deepin.org.cn\/zh\/linux-kernel-actpedit-vulnerability-fix\/>\u9605\u8bfb\u66f4\u591a<\/a><\/p>\n","protected":false},"author":18825,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[75,93],"tags":[],"_links":{"self":[{"href":"https:\/\/www.deepin.org.cn\/zh\/wp-json\/wp\/v2\/posts\/39364"}],"collection":[{"href":"https:\/\/www.deepin.org.cn\/zh\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.deepin.org.cn\/zh\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.deepin.org.cn\/zh\/wp-json\/wp\/v2\/users\/18825"}],"replies":[{"embeddable":true,"href":"https:\/\/www.deepin.org.cn\/zh\/wp-json\/wp\/v2\/comments?post=39364"}],"version-history":[{"count":7,"href":"https:\/\/www.deepin.org.cn\/zh\/wp-json\/wp\/v2\/posts\/39364\/revisions"}],"predecessor-version":[{"id":39374,"href":"https:\/\/www.deepin.org.cn\/zh\/wp-json\/wp\/v2\/posts\/39364\/revisions\/39374"}],"wp:attachment":[{"href":"https:\/\/www.deepin.org.cn\/zh\/wp-json\/wp\/v2\/media?parent=39364"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.deepin.org.cn\/zh\/wp-json\/wp\/v2\/categories?post=39364"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.deepin.org.cn\/zh\/wp-json\/wp\/v2\/tags?post=39364"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}