{"id":182595,"date":"2026-07-10T22:54:14","date_gmt":"2026-07-10T20:54:14","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/v-linux-raskryta-uyazvimost-ghostlock-pozvolyayushhaya-poluchit-root-dostup"},"modified":"2026-07-10T22:54:14","modified_gmt":"2026-07-10T20:54:14","slug":"v-linux-raskryta-uyazvimost-ghostlock-pozvolyayushhaya-poluchit-root-dostup","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sk\/blog\/news\/v-linux-raskryta-uyazvimost-ghostlock-pozvolyayushhaya-poluchit-root-dostup","title":{"rendered":"V Linuxe odhalen\u00e1 zranite\u013enos\u0165 GhostLock, ktor\u00e1 umo\u017e\u0148uje z\u00edska\u0165 pr\u00edstup k root-u","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

<\/i><\/a>
1 <\/p>\n

V jadre Linux bola odhalen\u00e1 zranite\u013enos\u0165 CVE-2026-43499<\/a>, ktor\u00e1 dostala neofici\u00e1lny n\u00e1zov GhostLock. Probl\u00e9m sa t\u00fdka k\u00f3du rtmutex a mechanizmu futex s dedi\u010dstvom prior\u00edt, pri\u010dom jej zneu\u017eitie m\u00f4\u017ee umo\u017eni\u0165 lok\u00e1lnemu nepodmienen\u00e9mu pou\u017e\u00edvate\u013eovi zv\u00fd\u0161i\u0165 pr\u00e1va na root. Pod\u013ea \u00fadajov AlmaLinux<\/a>, zranite\u013enos\u0165 m\u00f4\u017ee by\u0165 tie\u017e zneu\u017eit\u00e1 z kontajnera na hostite\u013ea, ak syst\u00e9m be\u017e\u00ed na neaktualizovanom jadre.<\/p>\n

<\/noindex> <\/p>\n

Podstata chyby s\u00favis\u00ed s funkciou remove_waiter() v kernel\/locking\/rtmutex.c. Ako je uveden\u00e9 v popise NVD<\/a>, pri odrazen\u00ed proxy-lock v scen\u00e1ri futex_requeue() funkcia pracovala s aktu\u00e1lnou \u00falohou (current), hoci mala \u010disti\u0165 stav tej \u00falohy, ktor\u00e1 skuto\u010dne \u010dakala na blokovanie (waiter::task). V d\u00f4sledku toho sa stav pi_blocked_on mohol nespr\u00e1vne \u010disti\u0165, \u010do zanech\u00e1valo visiac\u00ed ukazovate\u013e a vytv\u00e1ralo predpoklad na use-after-free.<\/p>\n

<\/noindex> <\/p>\n

V\u00fdskumn\u00edci z Nebula Security op\u00edsali GhostLock<\/a> ako chybu pr\u00edtomn\u00fa v hlavn\u00fdch distrib\u00faci\u00e1ch Linuxu od roku 2011. Verejn\u00e1 diskusia o zranite\u013enosti zv\u00fd\u0161ila riziko pre servery a kontajnerov\u00e9 prostredia: CloudLinux<\/a> osobitne varuje, \u017ee pre CVE-2026-43499 u\u017e existuje verejn\u00fd proof-of-concept, a preto by spr\u00e1vcovia nemali odklada\u0165 aktualiz\u00e1ciu jadra.<\/p>\n

<\/noindex> <\/p>\n

Oprava v upstreame spo\u010d\u00edva v tom, \u017ee remove_waiter() by mal pou\u017e\u00edva\u0165 waiter::task, nie current, vo v\u0161etk\u00fdch s\u00favisiacich oper\u00e1ci\u00e1ch. Na to poukazuje aj GitHub Advisory Database<\/a>, kde s\u00fa uveden\u00e9 d\u00f4sledky chyby: nespr\u00e1vne odstr\u00e1nenie z rbtree bez potrebnej blok\u00e1dy, nevy\u010disten\u00fd stav pi_blocked_on a pr\u00e1ca rt_mutex_adjust_prio_chain() nie s tou \u00falohou.<\/p>\n

<\/noindex> <\/p>\n

Pou\u017e\u00edvate\u013eom distrib\u00faci\u00ed Linuxu sa odpor\u00fa\u010da nain\u0161talova\u0165 \u010derstv\u00e9 aktualiz\u00e1cie jadra z ofici\u00e1lnych repozit\u00e1rov. Zranite\u013enos\u0165 m\u00e1 lok\u00e1lny charakter, a preto vzdialen\u00fd vstup s\u00e1m o sebe neposkytuje, ale na viacer\u00fdch pou\u017e\u00edvate\u013esk\u00fdch serveroch, CI infra\u0161trukt\u00farach, hostingu a syst\u00e9moch s kontajnermi je riziko zna\u010dne vy\u0161\u0161ie: \u00faspe\u0161n\u00e9 zneu\u017eitie premie\u0148a u\u017e z\u00edskan\u00fd n\u00edzkoprivil\u00e9govan\u00fd pr\u00edstup na \u00fapln\u00fa kontrolu nad syst\u00e9mom.<\/p>\n

Zdroj: linux.org.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

1 \u0412 \u044f\u0434\u0440\u0435 Linux \u0440\u0430\u0441\u043a\u0440\u044b\u0442\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c CVE-2026-43499, \u043f\u043e\u043b\u0443\u0447\u0438\u0432\u0448\u0430\u044f \u043d\u0435\u043e\u0444\u0438\u0446\u0438\u0430\u043b\u044c\u043d\u043e\u0435 \u043d\u0430\u0437\u0432\u0430\u043d\u0438\u0435 GhostLock. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0437\u0430\u0442\u0440\u0430\u0433\u0438\u0432\u0430\u0435\u0442 \u043a\u043e\u0434 rtmutex \u0438 \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c futex \u0441 \u043d\u0430\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u043d\u0438\u0435\u043c \u043f\u0440\u0438\u043e\u0440\u0438\u0442\u0435\u0442\u0430, \u0430 \u0435\u0451 \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0430\u0446\u0438\u044f \u043c\u043e\u0436\u0435\u0442 \u043f\u043e\u0437\u0432\u043e\u043b\u0438\u0442\u044c \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u043e\u043c\u0443 \u043d\u0435\u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u043c\u0443 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044e \u043f\u043e\u0432\u044b\u0441\u0438\u0442\u044c \u043f\u0440\u0430\u0432\u0430 \u0434\u043e root. \u041f\u043e \u0434\u0430\u043d\u043d\u044b\u043c AlmaLinux, \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0442\u0430\u043a\u0436\u0435 \u043c\u043e\u0436\u0435\u0442 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u044c\u0441\u044f \u0438\u0437 \u043a\u043e\u043d\u0442\u0435\u0439\u043d\u0435\u0440\u0430 \u0434\u043b\u044f \u0432\u044b\u0445\u043e\u0434\u0430 \u043d\u0430 \u0445\u043e\u0441\u0442, \u0435\u0441\u043b\u0438 \u0441\u0438\u0441\u0442\u0435\u043c\u0430 \u0440\u0430\u0431\u043e\u0442\u0430\u0435\u0442 \u043d\u0430 \u043d\u0435 \u043e\u0431\u043d\u043e\u0432\u043b\u0451\u043d\u043d\u043e\u043c \u044f\u0434\u0440\u0435. \u0421\u0443\u0442\u044c \u043e\u0448\u0438\u0431\u043a\u0438 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-182595","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\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\udd47V Linuxe bola odhalen\u00e1 zranite\u013enos\u0165 GhostLock, ktor\u00e1 umo\u017e\u0148uje z\u00edska\u0165 root pr\u00edstup | ProHoster","description":"1 V jadre Linux bola odhalen\u00e1 zranite\u013enos\u0165","canonical_url":"https:\/\/prohoster.info\/sk\/blog\/news\/v-linux-raskryta-uyazvimost-ghostlock-pozvolyayushhaya-poluchit-root-dostup","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"sk_SK","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\udd47\u0412 Linux \u0440\u0430\u0441\u043a\u0440\u044b\u0442\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c GhostLock, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c root-\u0434\u043e\u0441\u0442\u0443\u043f | ProHoster","og:description":"1 \u0412 \u044f\u0434\u0440\u0435 Linux \u0440\u0430\u0441\u043a\u0440\u044b\u0442\u0430 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c","og:url":"https:\/\/prohoster.info\/sk\/blog\/news\/v-linux-raskryta-uyazvimost-ghostlock-pozvolyayushhaya-poluchit-root-dostup","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":"2026-07-10T20:54:14+00:00","article:modified_time":"2026-07-10T20:54:14+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":{"post_id":"182595","title":null,"description":null,"keywords":null,"keyphrases":{"focus":[],"additional":[]},"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"default","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":"default","schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"seo_analyzer_scan_date":null,"breadcrumb_settings":null,"limit_modified_date":false,"reviewed_by":null,"ai":null,"created":"2026-08-05 12:22:05","updated":"2026-08-05 12:22:05","focus_keyword":null,"additional_keywords":null,"truseo_locale":null},"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/posts\/182595","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/comments?post=182595"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/posts\/182595\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/media?parent=182595"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/categories?post=182595"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/sk\/wp-json\/wp\/v2\/tags?post=182595"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}