{"id":123875,"date":"2025-04-30T15:05:08","date_gmt":"2025-04-30T13:05:08","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/uyazvimost-v-yadre-linux-pozvolyayushhaya-povysit-svoi-privilegii-cherez-vsock"},"modified":"2025-04-30T15:05:08","modified_gmt":"2025-04-30T13:05:08","slug":"uyazvimost-v-yadre-linux-pozvolyayushhaya-povysit-svoi-privilegii-cherez-vsock","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/novosti-interneta\/uyazvimost-v-yadre-linux-pozvolyayushhaya-povysit-svoi-privilegii-cherez-vsock","title":{"rendered":"Linuxi tuumas on haavatavus, mis v\u00f5imaldab t\u00f5sta \u00f5igusi VSOCK-i kaudu.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Demonstratsioon CVE-2025-21756 haavatavuse t\u00f6\u00f6ka avamise v\u00f5imalusest, mis on p\u00f5hjustatud t\u00f5rgest Linuxi tuumas, mis viib m\u00e4lu kasutamiseni p\u00e4rast selle vabastamist. Probleem m\u00f5jutab AF_VSOCK aadressimisega soklite rakendust, mis on m\u00f5eldud k\u00fclaliss\u00fcsteemide ja hostide vaheliseks v\u00f5rgu\u00fchenduseks. Avaldatud t\u00f6\u00f6riist v\u00f5imaldab k\u00e4ivitada koodi root'i \u00f5igustes Linuxi kernelitega 6.6.75 (muude versioonide puhul on vajalik t\u00f6\u00f6riista muutmine). <\/p>\n

Probleem on lahendatud Linuxi kernel 6.14-s ning veebruari ja m\u00e4rtsi turvapaikades stabiilsetes harudes, nagu 6.12.16, 6.6.79 ja 6.1.131. Haavatavus on samuti parandatud kernelipakettides RHEL, SUSE\/openSUSE ning Ubuntu ja Debian 12 jaoks, kuid j\u00e4\u00e4b lahendamata Debian 11-s. <\/p>\n

Haavatavus on seotud sellega, et AF_VSOCK sokli transpordi \u00fcmbersuunamisel kutsutakse esile funktsioon vsock_remove_sock, mis seej\u00e4rel kutsub v\u00e4lja funktsiooni vsock_remove_bound, mis vale v\u00e4hendamisega v\u00e4hendab vsock objekti viidete loendit. Seel\u00e4bi muutub viidete loendi v\u00e4\u00e4rtus nulliks ja tuum vabastab objekti jaoks eraldatud m\u00e4lu, hoolimata sellest, et seda kasutatakse endiselt.
\n
Allikas: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u041f\u0440\u043e\u0434\u0435\u043c\u043e\u043d\u0441\u0442\u0440\u0438\u0440\u043e\u0432\u0430\u043d\u0430 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u044f \u0440\u0430\u0431\u043e\u0447\u0435\u0433\u043e \u044d\u043a\u0441\u043f\u043b\u043e\u0438\u0442\u0430 \u0434\u043b\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 CVE-2025-21756, \u0432\u044b\u0437\u0432\u0430\u043d\u043d\u043e\u0439 \u043e\u0448\u0438\u0431\u043a\u043e\u0439 \u0432 \u044f\u0434\u0440\u0435 Linux, \u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0449\u0435\u0439 \u043a \u043e\u0431\u0440\u0430\u0449\u0435\u043d\u0438\u044e \u043a \u043f\u0430\u043c\u044f\u0442\u0438 \u043f\u043e\u0441\u043b\u0435 \u0435\u0451 \u043e\u0441\u0432\u043e\u0431\u043e\u0436\u0434\u0435\u043d\u0438\u044f. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0437\u0430\u0442\u0440\u0430\u0433\u0438\u0432\u0430\u0435\u0442 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044e \u0441\u043e\u043a\u0435\u0442\u043e\u0432 \u0441 \u0430\u0434\u0440\u0435\u0441\u0430\u0446\u0438\u0435\u0439 AF_VSOCK, \u043f\u0440\u0435\u0434\u043d\u0430\u0437\u043d\u0430\u0447\u0435\u043d\u043d\u044b\u0445 \u0434\u043b\u044f \u0441\u0435\u0442\u0435\u0432\u043e\u0433\u043e \u0432\u0437\u0430\u0438\u043c\u043e\u0434\u0435\u0439\u0441\u0442\u0432\u0438\u044f \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u0433\u043e\u0441\u0442\u0435\u0432\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c \u0438 \u0445\u043e\u0441\u0442\u043e\u0432. \u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u043d\u044b\u0439 \u044d\u043a\u0441\u043f\u043b\u043e\u0438\u0442 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u043a\u043e\u0434 \u0441 \u043f\u0440\u0430\u0432\u0430\u043c\u0438 root \u043d\u0430 \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u0445 \u0441 \u044f\u0434\u0440\u043e\u043c Linux 6.6.75 (\u0434\u043b\u044f \u0434\u0440\u0443\u0433\u0438\u0445 \u0432\u0435\u0440\u0441\u0438\u0439 \u0442\u0440\u0435\u0431\u0443\u0435\u0442\u0441\u044f […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-123875","post","type-post","status-publish","format-standard","hentry","category-novosti-interneta"],"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\udd47 Linuxi tuumas esinev haavatavus, mis v\u00f5imaldab privileegide t\u00f5stmist l\u00e4bi VSOCK | ProHoster","description":"Demonstratsioon CVE-2025-21756 haavatavuse \u00e4rakasutamise v\u00f5imalusest, mille p\u00f5hjustab Linuxi tuuma viga, mis toob kaasa m\u00e4lu kasutamise p\u00e4rast selle vabastamist. Probleem puudutab AF_VSOCK-aadressimisega soklite rakendust, mis on m\u00f5eldud k\u00fclgseente ja hostide vaheline v\u00f5rgu\u00fchendus. Avaldatud eksploit v\u00f5imaldab k\u00e4ivitada koodi root \u00f5igustega Linuxi tuumaga s\u00fcsteemides versioonis 6.6.75 (teiste versioonide jaoks on vajalik","canonical_url":"https:\/\/prohoster.info\/et\/blog\/novosti-interneta\/uyazvimost-v-yadre-linux-pozvolyayushhaya-povysit-svoi-privilegii-cherez-vsock","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"et_EE","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\u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432 \u044f\u0434\u0440\u0435 Linux, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u043f\u043e\u0432\u044b\u0441\u0438\u0442\u044c \u0441\u0432\u043e\u0438 \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0438 \u0447\u0435\u0440\u0435\u0437 VSOCK | ProHoster","og:description":"\u041f\u0440\u043e\u0434\u0435\u043c\u043e\u043d\u0441\u0442\u0440\u0438\u0440\u043e\u0432\u0430\u043d\u0430 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u0441\u043e\u0437\u0434\u0430\u043d\u0438\u044f \u0440\u0430\u0431\u043e\u0447\u0435\u0433\u043e \u044d\u043a\u0441\u043f\u043b\u043e\u0438\u0442\u0430 \u0434\u043b\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 CVE-2025-21756, \u0432\u044b\u0437\u0432\u0430\u043d\u043d\u043e\u0439 \u043e\u0448\u0438\u0431\u043a\u043e\u0439 \u0432 \u044f\u0434\u0440\u0435 Linux, \u043f\u0440\u0438\u0432\u043e\u0434\u044f\u0449\u0435\u0439 \u043a \u043e\u0431\u0440\u0430\u0449\u0435\u043d\u0438\u044e \u043a \u043f\u0430\u043c\u044f\u0442\u0438 \u043f\u043e\u0441\u043b\u0435 \u0435\u0451 \u043e\u0441\u0432\u043e\u0431\u043e\u0436\u0434\u0435\u043d\u0438\u044f. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u0430 \u0437\u0430\u0442\u0440\u0430\u0433\u0438\u0432\u0430\u0435\u0442 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044e \u0441\u043e\u043a\u0435\u0442\u043e\u0432 \u0441 \u0430\u0434\u0440\u0435\u0441\u0430\u0446\u0438\u0435\u0439 AF_VSOCK, \u043f\u0440\u0435\u0434\u043d\u0430\u0437\u043d\u0430\u0447\u0435\u043d\u043d\u044b\u0445 \u0434\u043b\u044f \u0441\u0435\u0442\u0435\u0432\u043e\u0433\u043e \u0432\u0437\u0430\u0438\u043c\u043e\u0434\u0435\u0439\u0441\u0442\u0432\u0438\u044f \u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u0433\u043e\u0441\u0442\u0435\u0432\u044b\u0445 \u0441\u0438\u0441\u0442\u0435\u043c \u0438 \u0445\u043e\u0441\u0442\u043e\u0432. \u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u043d\u044b\u0439 \u044d\u043a\u0441\u043f\u043b\u043e\u0438\u0442 \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 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