{"id":181668,"date":"2026-05-23T00:25:11","date_gmt":"2026-05-22T22:25:11","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/gro-frag-sedmaya-uyazvimost-klassa-copy-fail-predostavlyayushhaya-prava-root-v-linux"},"modified":"2026-05-23T00:25:11","modified_gmt":"2026-05-22T22:25:11","slug":"gro-frag-sedmaya-uyazvimost-klassa-copy-fail-predostavlyayushhaya-prava-root-v-linux","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pl\/blog\/news\/gro-frag-sedmaya-uyazvimost-klassa-copy-fail-predostavlyayushhaya-prava-root-v-linux","title":{"rendered":"GRO Frag \u2014 si\u00f3dma luka klasy Copy Fail, przyznaj\u0105ca prawa root w systemie Linux","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

W publicznym dost\u0119pie opublikowano exploit dla si\u00f3dmej podatno\u015bci (1, 2-3, 4, 5, 6) w j\u0105drze Linux, umo\u017cliwiaj\u0105cej nieuprzywilejowanemu lokalnemu u\u017cytkownikowi uzyskanie praw roota poprzez nadpisywanie danych w pami\u0119ci podr\u0119cznej stron. Identyfikator CVE jeszcze nie zosta\u0142 przypisany, poza kodem exploita brak jest informacji na temat problemu. Poprawka jest dost\u0119pna tylko w formie \u0142atki, kt\u00f3ra zosta\u0142a opublikowana 20 maja, a 21 maja zosta\u0142a przyj\u0119ta do g\u0142\u00f3wnej ga\u0142\u0119zi j\u0105dra Linux (poprawkowe wersje j\u0105dra s\u0105 jeszcze niedost\u0119pne). <\/p>\n

Podatno\u015b\u0107 wyst\u0119puje w implementacji technologii GRO (Generic Receive Offload), u\u017cywanej do przyspieszania przetwarzania segmentowanych pakiet\u00f3w. Podatno\u015b\u0107 zosta\u0142a spowodowana b\u0142\u0119dem w implementacji mechanizmu zerocopy w funkcji skb_gro_receive(), kt\u00f3ra dokonuje bezpo\u015bredniej zmiany danych w pami\u0119ci podr\u0119cznej stron w celu wyeliminowania niepotrzebnego buforowania. Przy w\u0142\u0105czonym znaku SKBFL_MANAGED_FRAG_REFS pomijano zachowanie odniesienia do wyzwalanych stron pami\u0119ci w polu shinfo->frags, po czym to pole \u0142\u0105czono z innym skb bez zmiany licznika odniesie\u0144, co prowadzi\u0142o do dost\u0119pu do pami\u0119ci po jej zwolnieniu (use-after-free). Problem uda\u0142o si\u0119 wykorzysta\u0107 do nadpisania danych w pami\u0119ci podr\u0119cznej stron dzi\u0119ki manipulacji wska\u017anikiem do bufora io_uring. <\/p>\n

Atak jest mo\u017cliwy na systemach z w\u0142\u0105czonym podsystemem io_uring (io_uring_disabled=0). Aby exploit dzia\u0142a\u0142, w systemie musi by\u0107 dost\u0119pny do odczytu plik wykonywalny z flag\u0105 SUID-root. Mechanizm eksploatacji polega na tym, \u017ce atakuj\u0105cy d\u0105\u017cy do umieszczenia bazy u\u017cytkownik\u00f3w w pami\u0119ci podr\u0119cznej stron, a nast\u0119pnie wstawia do pami\u0119ci podr\u0119cznej wpis \u201ehax::0:0::\/root:\/bin\/sh\u201d. Nast\u0119pnie uruchamiana jest komenda \u201esu hax\u201d, kt\u00f3ra nie odzyskuje oryginalnej bazy u\u017cytkownik\u00f3w z no\u015bnika, lecz zmodyfikowan\u0105 kopi\u0119 z fa\u0142szywym loginem \u201ehax\u201d, kt\u00f3remu przypisano prawa roota i pusty has\u0142o. Dzia\u0142anie exploita zosta\u0142o przetestowane w Ubuntu 24.04.
\n
\u0179r\u00f3d\u0142o: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0412 \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u043c \u0434\u043e\u0441\u0442\u0443\u043f\u0435 \u0440\u0430\u0437\u043c\u0435\u0449\u0451\u043d \u044d\u043a\u0441\u043f\u043b\u043e\u0438\u0442 \u0434\u043b\u044f \u0441\u0435\u0434\u044c\u043c\u043e\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 (1, 2-3, 4, 5, 6) \u0432 \u044f\u0434\u0440\u0435 Linux, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0439 \u043d\u0435\u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u043c\u0443 \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u043e\u043c\u0443 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044e \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u043f\u0440\u0430\u0432\u0430 root, \u043f\u0435\u0440\u0435\u0437\u0430\u043f\u0438\u0441\u0430\u0432 \u0434\u0430\u043d\u043d\u044b\u0435 \u0432 \u0441\u0442\u0440\u0430\u043d\u0438\u0447\u043d\u043e\u043c \u043a\u044d\u0448\u0435. CVE-\u0438\u0434\u0435\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440 \u0435\u0449\u0451 \u043d\u0435 \u043f\u0440\u0438\u0441\u0432\u043e\u0435\u043d, \u043a\u0440\u043e\u043c\u0435 \u043a\u043e\u0434\u0430 \u044d\u043a\u0441\u043f\u043b\u043e\u0438\u0442\u0430 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u0438 \u043e \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u0435 \u043f\u043e\u043a\u0430 \u043d\u0435\u0442. \u0418\u0441\u043f\u0440\u0430\u0432\u043b\u0435\u043d\u0438\u0435 \u0434\u043e\u0441\u0442\u0443\u043f\u043d\u043e \u0442\u043e\u043b\u044c\u043a\u043e \u0432 \u0432\u0438\u0434\u0435 \u043f\u0430\u0442\u0447\u0430, \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d 20 \u043c\u0430\u044f \u0438 21 \u043c\u0430\u044f \u0431\u044b\u043b \u043f\u0440\u0438\u043d\u044f\u0442 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":8,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-181668","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47GRO Frag \u2014 si\u00f3dma podatno\u015b\u0107 klasy Copy Fail, daj\u0105ca uprawnienia root w Linux | ProHoster","description":"W publicznej dost\u0119pno\u015bci znajduje si\u0119 exploit dla si\u00f3dmej luki (1, 2-3, 4, 5, 6) w j\u0105drze Linux, kt\u00f3ra umo\u017cliwia nieuprzywilejowanemu lokalnemu u\u017cytkownikowi uzyskanie praw roota poprzez nadpisanie danych w pami\u0119ci podr\u0119cznej stron.","canonical_url":"https:\/\/prohoster.info\/pl\/blog\/news\/gro-frag-sedmaya-uyazvimost-klassa-copy-fail-predostavlyayushhaya-prava-root-v-linux","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"pl_PL","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47GRO Frag \u2014 \u0441\u0435\u0434\u044c\u043c\u0430\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u043a\u043b\u0430\u0441\u0441\u0430 Copy Fail, \u043f\u0440\u0435\u0434\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u044e\u0449\u0430\u044f \u043f\u0440\u0430\u0432\u0430 root \u0432 Linux | ProHoster","og:description":"\u0412 \u043e\u0442\u043a\u0440\u044b\u0442\u043e\u043c \u0434\u043e\u0441\u0442\u0443\u043f\u0435 \u0440\u0430\u0437\u043c\u0435\u0449\u0451\u043d \u044d\u043a\u0441\u043f\u043b\u043e\u0438\u0442 \u0434\u043b\u044f \u0441\u0435\u0434\u044c\u043c\u043e\u0439 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 (1, 2-3, 4, 5, 6) \u0432 \u044f\u0434\u0440\u0435 Linux, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0435\u0439 \u043d\u0435\u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u043c\u0443 \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u043e\u043c\u0443 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044e \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u043f\u0440\u0430\u0432\u0430 root, \u043f\u0435\u0440\u0435\u0437\u0430\u043f\u0438\u0441\u0430\u0432 \u0434\u0430\u043d\u043d\u044b\u0435 \u0432 \u0441\u0442\u0440\u0430\u043d\u0438\u0447\u043d\u043e\u043c \u043a\u044d\u0448\u0435.","og:url":"https:\/\/prohoster.info\/pl\/blog\/news\/gro-frag-sedmaya-uyazvimost-klassa-copy-fail-predostavlyayushhaya-prava-root-v-linux","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2026-05-22T22:25:11+00:00","article:modified_time":"2026-05-22T22:25:11+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":[],"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/posts\/181668","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/comments?post=181668"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/posts\/181668\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/media?parent=181668"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/categories?post=181668"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/pl\/wp-json\/wp\/v2\/tags?post=181668"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}