{"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\/da\/blog\/news\/v-linux-raskryta-uyazvimost-ghostlock-pozvolyayushhaya-poluchit-root-dostup","title":{"rendered":"En Linux er s\u00e5rbarheden GhostLock blevet afsl\u00f8ret, hvilket muligg\u00f8r root-adgang.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

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1 <\/p>\n

En s\u00e5rbarhed er blevet afsl\u00f8ret i Linux-kernen. CVE-2026-43499<\/a>, som har f\u00e5et det uofficielle navn GhostLock. Problemet ber\u00f8rer koden rtmutex og mekanismen futex med prioriteringsarv, og udnyttelse af det kan give en lokal, ikke-privilegeret bruger mulighed for at h\u00e6ve sine rettigheder til root. If\u00f8lge AlmaLinux<\/a>, kan s\u00e5rbarheden ogs\u00e5 udnyttes fra en container for at f\u00e5 adgang til v\u00e6rten, hvis systemet k\u00f8rer p\u00e5 en uopdateret kerne.<\/p>\n

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

Essensen af fejlen er relateret til funktionen remove_waiter() i kernel\/locking\/rtmutex.c. Som angivet i NVD's beskrivelse<\/a>, n\u00e5r proxy-locken blev rullet tilbage i scenariet futex_requeue(), arbejdede funktionen med den nuv\u00e6rende opgave (current), selvom den skulle have renset tilstanden for den opgave, der faktisk ventede p\u00e5 l\u00e5sen (waiter::task). Som f\u00f8lge heraf kunne tilstanden pi_blocked_on muligvis ikke blive renset korrekt, hvilket efterlod en h\u00e6ngende peger og skabte foruds\u00e6tninger for use-after-free.<\/p>\n

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

Forskere fra Nebula Security har beskrevet GhostLock<\/a> som en fejl, der har v\u00e6ret til stede i de vigtigste Linux-distributioner siden 2011. Den offentlige diskussion af s\u00e5rbarheden har \u00f8get risikoen for servere og container-milj\u00f8er: CloudLinux<\/a> advarer specifikt om, at der allerede findes et offentligt proof-of-concept for CVE-2026-43499, derfor b\u00f8r administratorer ikke uds\u00e6tte opdateringen af kernen.<\/p>\n

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

Fixet i upstream er, at remove_waiter() b\u00f8r bruge waiter::task snarere end current i alle relaterede operationer. Dette angives ogs\u00e5 i GitHub Advisory Database<\/a>, hvor konsekvenserne af fejlen er opregnet: forkert fjernelse fra rbtree uden n\u00f8dvendig l\u00e5sning, renset tilstand af pi_blocked_on og rt_mutex_adjust_prio_chain() arbejder ikke med den rigtige opgave.<\/p>\n

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

Brugere af Linux-distributioner anbefales at installere de nyeste kernelopdateringer fra officielle repositories. S\u00e5rbarheden er lokal, s\u00e5 fjernadgang i sig selv gives ikke, men p\u00e5 multi-bruger-servere, CI-infrastrukturen, hosting og systemer med containere er risikoen betydeligt h\u00f8jere: en vellykket udnyttelse forvandler allerede opn\u00e5et lavprivilegeret adgang til fuld kontrol over systemet.<\/p>\n

Kilde: 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\udd47 En s\u00e5rbarhed er blevet afsl\u00f8ret i Linux - 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