{"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\/pl\/blog\/news\/v-linux-raskryta-uyazvimost-ghostlock-pozvolyayushhaya-poluchit-root-dostup","title":{"rendered":"W systemie Linux ujawniono luk\u0119 GhostLock, umo\u017cliwiaj\u0105c\u0105 uzyskanie dost\u0119pu do roota","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><noindex>          <a rel=\"nofollow\" id=\"memories_button\" href=\"#\" title=\"\u015aledzi\u0107\"><i class=\"icon-bell\"><\/i><\/a><br \/>1                            <noindex><\/p>\n<p>W j\u0105drze Linux odkryto podatno\u015b\u0107 <a rel=\"nofollow\" href=\"https:\/\/nvd.nist.gov\/vuln\/detail\/CVE-2026-43499\">CVE-2026-43499<\/a>, znana nieoficjalnie jako GhostLock. Problem dotyczy kodu rtmutex oraz mechanizmu futex z dziedziczeniem priorytet\u00f3w, a jego wykorzystanie mo\u017ce umo\u017cliwi\u0107 lokalnemu, nieuprzywilejowanemu u\u017cytkownikowi podniesienie uprawnie\u0144 do roota. Wed\u0142ug danych <a rel=\"nofollow\" href=\"https:\/\/almalinux.org\/cs\/blog\/2026-07-09-ghostlock\/\">AlmaLinux<\/a>, podatno\u015b\u0107 mo\u017ce by\u0107 r\u00f3wnie\u017c wykorzystywana z kontenera do uzyskania dost\u0119pu do hosta, je\u015bli system dzia\u0142a na nieaktualnym j\u0105drze.<\/p>\n<p><\/noindex>  <noindex><\/p>\n<p>Istota b\u0142\u0119du zwi\u0105zana jest z funkcj\u0105 remove_waiter() w kernel\/locking\/rtmutex.c. Jak wskazano w <a rel=\"nofollow\" href=\"https:\/\/nvd.nist.gov\/vuln\/detail\/CVE-2026-43499\">opisie NVD<\/a>, podczas wycofywania proxy-lock w scenariuszu futex_requeue() funkcja dzia\u0142a\u0142a z bie\u017c\u0105cym zadaniem (current), mimo \u017ce powinna by\u0142a oczy\u015bci\u0107 stan tego zadania, kt\u00f3re faktycznie czeka\u0142o na zablokowanie (waiter::task). W rezultacie stan pi_blocked_on m\u00f3g\u0142 nie zosta\u0107 prawid\u0142owo oczyszczony, pozostawiaj\u0105c wisz\u0105cy wska\u017anik i tworz\u0105c warunki dla use-after-free.<\/p>\n<p><\/noindex> <noindex><\/p>\n<p>Badacze z Nebula Security <a rel=\"nofollow\" href=\"https:\/\/nebusec.ai\/research\/ionstack-part-2\/\">opisali GhostLock<\/a> jako b\u0142\u0105d obecny w g\u0142\u00f3wnych dystrybucjach Linuxa od 2011 roku. Publiczna dyskusja na temat podatno\u015bci zwi\u0119ksza ryzyko dla serwer\u00f3w i \u015brodowisk kontenerowych: <a rel=\"nofollow\" href=\"https:\/\/blog.cloudlinux.com\/ghostlock-cve-2026-43499-local-root-exploit-kernel-update-for-cloudlinux\/\">CloudLinux<\/a> wyra\u017anie ostrzega, \u017ce dla CVE-2026-43499 istnieje ju\u017c publiczny dow\u00f3d koncepcji, dlatego administratorzy nie powinni odk\u0142ada\u0107 aktualizacji j\u0105dra.<\/p>\n<p><\/noindex> <noindex><\/p>\n<p>Poprawka w upstreamie sprowadza si\u0119 do tego, \u017ce remove_waiter() powinien u\u017cywa\u0107 waiter::task, a nie current, we wszystkich zwi\u0105zanych operacjach. Na to r\u00f3wnie\u017c wskazuje <a rel=\"nofollow\" href=\"https:\/\/github.com\/advisories\/GHSA-cqc6-9f34-295v\">GitHub Advisory Database<\/a>, gdzie wymieniono konsekwencje b\u0142\u0119du: nieprawid\u0142owe usuni\u0119cie z rbtree bez odpowiedniej blokady, nieoczyszczony stan pi_blocked_on oraz dzia\u0142anie rt_mutex_adjust_prio_chain() nie z tym zadaniem.<\/p>\n<p><\/noindex> <\/p>\n<p>U\u017cytkownikom dystrybucji Linuxa zaleca si\u0119 zainstalowanie \u015bwie\u017cych aktualizacji j\u0105dra z oficjalnych repozytori\u00f3w. Podatno\u015b\u0107 ma charakter lokalny, wi\u0119c sama w sobie nie daje mo\u017cliwo\u015bci zdalnego dost\u0119pu, ale na serwerach wielodost\u0119pnych, infrastrukturze CI, hostingach i systemach z kontenerami ryzyko jest znacznie wy\u017csze: udane wykorzystanie przekszta\u0142ca ju\u017c uzyskany niskouprzywilejowany dost\u0119p w pe\u0142n\u0105 kontrol\u0119 nad systemem.<\/p>\n<p>\u0179r\u00f3d\u0142o: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.linux.org.ru\/news\/security\/18336500\">linux.org.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>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 [&hellip;]<\/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<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"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\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Emin Berklin\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/prohoster.info\/pl\/blog\/news\/v-linux-raskryta-uyazvimost-ghostlock-pozvolyayushhaya-poluchit-root-dostup\" \/>\n\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 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