{"id":170538,"date":"2026-05-09T00:24:31","date_gmt":"2026-05-08T22:24:31","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/predlozhen-killswitch-dlya-ekstrennogo-otklyucheniya-uyazvimoj-funkczionalnosti-v-yadre-linux"},"modified":"2026-05-09T00:24:31","modified_gmt":"2026-05-08T22:24:31","slug":"predlozhen-killswitch-dlya-ekstrennogo-otklyucheniya-uyazvimoj-funkczionalnosti-v-yadre-linux","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/predlozhen-killswitch-dlya-ekstrennogo-otklyucheniya-uyazvimoj-funkczionalnosti-v-yadre-linux","title":{"rendered":"Navr\u017een killswitch pro okam\u017eit\u00e9 vypnut\u00ed zraniteln\u00e9 funk\u010dnosti v j\u00e1d\u0159e Linux","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Sasha Levin ze spole\u010dnosti NVIDIA, kter\u00fd se zab\u00fdv\u00e1 \u00fadr\u017ebou LTS v\u011btv\u00ed j\u00e1dra Linux a je \u010dlenem poradn\u00edho v\u00fdboru organizace Linux Foundation, p\u0159ipravil sadu patch\u016f s realizac\u00ed mechanismu killswitch pro j\u00e1dro Linux. Navrhovan\u00e1 mo\u017enost umo\u017e\u0148uje okam\u017eit\u011b vypnout p\u0159\u00edstup k ur\u010dit\u00e9 funk\u010dnosti b\u011b\u017e\u00edc\u00edho j\u00e1dra. P\u0159edpokl\u00e1d\u00e1 se, \u017ee killswitch bude u\u017eite\u010dn\u00fd pro do\u010dasn\u00e9 zablokov\u00e1n\u00ed zranitelnost\u00ed do doby, ne\u017e bude nainstalov\u00e1no j\u00e1drov\u00e9 aktualizace s opravou. <\/p>\n

Spr\u00e1va killswitch se prov\u00e1d\u00ed prost\u0159ednictv\u00edm souboru \"\\\/sys\\\/kernel\\\/security\\\/killswitch\\\/control\", kter\u00fd umo\u017e\u0148uje nastavit zachycen\u00ed vol\u00e1n\u00ed j\u00e1drov\u00fdch funkc\u00ed podle jejich n\u00e1zv\u016f. Nap\u0159\u00edklad k blokov\u00e1n\u00ed zranitelnosti Copy Fail sta\u010d\u00ed zapsat do \u0159\u00eddic\u00edho souboru p\u0159\u00edkaz \"engage af_alg_sendmsg -1\" pro aktivaci zachycen\u00ed vol\u00e1n\u00ed funkce af_alg_sendmsg a m\u00edsto jej\u00edho proveden\u00ed vr\u00e1tit k\u00f3d chyby \"-1\". <\/p>\n

Jako n\u00e1zvy mohou b\u00fdt pou\u017eity jak\u00e9koli znaky podporovan\u00e9 subsyst\u00e9mem kprobes. Mnoho z ned\u00e1vno objeven\u00fdch z\u00e1va\u017en\u00fdch zranitelnost\u00ed v j\u00e1d\u0159e se nach\u00e1z\u00ed v subsyst\u00e9mech, kter\u00e9 pou\u017e\u00edv\u00e1 relativn\u011b mal\u00e9 mno\u017estv\u00ed u\u017eivatel\u016f (nap\u0159\u00edklad AF_ALG, ksmbd, nf_tables, vsock, ax25). Pro v\u011bt\u0161inu u\u017eivatel\u016f je nep\u0159\u00edjemnost zp\u016fsoben\u00e1 ukon\u010den\u00edm funk\u010dnosti jednotliv\u00fdch funkc\u00ed nesrovnateln\u00e1 s rizikem pou\u017e\u00edv\u00e1n\u00ed j\u00e1dra s zn\u00e1mou neopravenu zranitelnost\u00ed do doby, ne\u017e bude oprava nainstalov\u00e1na. Mechanismus killswitch je obzvl\u00e1\u0161\u0165 aktu\u00e1ln\u00ed v kontextu ned\u00e1vn\u00e9 zranitelnosti Dirty Frag, exploit pro kterou byl publikov\u00e1n d\u0159\u00edve, ne\u017e byl probl\u00e9m odstran\u011bn v j\u00e1d\u0159e.
\n
Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0421\u0430\u0448\u0430 \u041b\u0435\u0432\u0438\u043d (Sasha Levin) \u0438\u0437 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438 NVIDIA, \u0437\u0430\u043d\u0438\u043c\u0430\u044e\u0449\u0438\u0439\u0441\u044f \u0441\u043e\u043f\u0440\u043e\u0432\u043e\u0436\u0434\u0435\u043d\u0438\u0435\u043c LTS-\u0432\u0435\u0442\u043e\u043a \u044f\u0434\u0440\u0430 Linux \u0438 \u0432\u0445\u043e\u0434\u044f\u0449\u0438\u0439 \u0432 \u043a\u043e\u043d\u0441\u0443\u043b\u044c\u0442\u0430\u0442\u0438\u0432\u043d\u044b\u0439 \u0441\u043e\u0432\u0435\u0442 \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u0430\u0446\u0438\u0438 Linux Foundation, \u043f\u043e\u0434\u0433\u043e\u0442\u043e\u0432\u0438\u043b \u043d\u0430\u0431\u043e\u0440 \u043f\u0430\u0442\u0447\u0435\u0439 \u0441 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0435\u0439 \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c\u0430 killswitch \u0434\u043b\u044f \u044f\u0434\u0440\u0430 Linux. \u041f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d\u043d\u0430\u044f \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u043c\u0433\u043d\u043e\u0432\u0435\u043d\u043d\u043e \u043e\u0442\u043a\u043b\u044e\u0447\u0438\u0442\u044c \u0434\u043e\u0441\u0442\u0443\u043f \u043a \u043e\u043f\u0440\u0435\u0434\u0435\u043b\u0451\u043d\u043d\u043e\u0439 \u0444\u0443\u043d\u043a\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u043e\u0441\u0442\u0438 \u0440\u0430\u0431\u043e\u0442\u0430\u044e\u0449\u0435\u0433\u043e \u044f\u0434\u0440\u0430. \u041f\u0440\u0435\u0434\u043f\u043e\u043b\u0430\u0433\u0430\u0435\u0442\u0441\u044f, \u0447\u0442\u043e killswitch \u0431\u0443\u0434\u0435\u0442 \u043f\u043e\u043b\u0435\u0437\u0435\u043d \u0434\u043b\u044f \u0432\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0433\u043e \u0431\u043b\u043e\u043a\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 \u043d\u0430 \u0432\u0440\u0435\u043c\u044f \u0434\u043e \u0443\u0441\u0442\u0430\u043d\u043e\u0432\u043a\u0438 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f […]<\/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-170538","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\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Navr\u017een killswitch pro okam\u017eit\u00e9 vypnut\u00ed zraniteln\u00e9 funk\u010dnosti v j\u00e1d\u0159e Linux | ProHoster","description":"Sasha Levin ze spole\u010dnosti NVIDIA, kter\u00fd se zab\u00fdv\u00e1 \u00fadr\u017ebou LTS v\u011btv\u00ed j\u00e1dra Linux a je \u010dlenem poradn\u00edho v\u00fdboru organizace Linux Foundation, p\u0159ipravil sadu patch\u016f s realizac\u00ed mechanismu.","canonical_url":"https:\/\/prohoster.info\/cs\/blog\/news\/predlozhen-killswitch-dlya-ekstrennogo-otklyucheniya-uyazvimoj-funkczionalnosti-v-yadre-linux","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"cs_CZ","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\u041f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d killswitch \u0434\u043b\u044f \u044d\u043a\u0441\u0442\u0440\u0435\u043d\u043d\u043e\u0433\u043e \u043e\u0442\u043a\u043b\u044e\u0447\u0435\u043d\u0438\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0439 \u0444\u0443\u043d\u043a\u0446\u0438\u043e\u043d\u0430\u043b\u044c\u043d\u043e\u0441\u0442\u0438 \u0432 \u044f\u0434\u0440\u0435 Linux | ProHoster","og:description":"\u0421\u0430\u0448\u0430 \u041b\u0435\u0432\u0438\u043d (Sasha Levin) \u0438\u0437 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438 NVIDIA, \u0437\u0430\u043d\u0438\u043c\u0430\u044e\u0449\u0438\u0439\u0441\u044f \u0441\u043e\u043f\u0440\u043e\u0432\u043e\u0436\u0434\u0435\u043d\u0438\u0435\u043c LTS-\u0432\u0435\u0442\u043e\u043a \u044f\u0434\u0440\u0430 Linux \u0438 \u0432\u0445\u043e\u0434\u044f\u0449\u0438\u0439 \u0432 \u043a\u043e\u043d\u0441\u0443\u043b\u044c\u0442\u0430\u0442\u0438\u0432\u043d\u044b\u0439 \u0441\u043e\u0432\u0435\u0442 \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u0430\u0446\u0438\u0438 Linux Foundation, \u043f\u043e\u0434\u0433\u043e\u0442\u043e\u0432\u0438\u043b \u043d\u0430\u0431\u043e\u0440 \u043f\u0430\u0442\u0447\u0435\u0439 \u0441 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0435\u0439 \u043c\u0435\u0445\u0430\u043d\u0438\u0437\u043c\u0430.","og:url":"https:\/\/prohoster.info\/cs\/blog\/news\/predlozhen-killswitch-dlya-ekstrennogo-otklyucheniya-uyazvimoj-funkczionalnosti-v-yadre-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":"2026-05-08T22:24:31+00:00","article:modified_time":"2026-05-08T22:24:31+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\/cs\/wp-json\/wp\/v2\/posts\/170538","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/comments?post=170538"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts\/170538\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/media?parent=170538"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/categories?post=170538"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/tags?post=170538"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}