{"id":183301,"date":"2026-09-09T22:54:13","date_gmt":"2026-09-09T20:54:13","guid":{"rendered":"https:\/\/prohoster.info\/blog\/news\/18-uyazvimostej-v-yadre-linux-c-eksploitami-dlya-polucheniya-prav-root-v-sisteme"},"modified":"2026-09-09T22:54:19","modified_gmt":"2026-09-09T20:54:19","slug":"18-linux-kernel-vulnerabilities-with-exploits-to-gain-root-access","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/18-linux-kernel-vulnerabilities-with-exploits-to-gain-root-access","title":{"rendered":"18 zranitelnost\u00ed v j\u00e1d\u0159e Linuxu s exploity pro z\u00edsk\u00e1n\u00ed pr\u00e1v root v syst\u00e9mu","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>V\u00fdzkumn\u00edci z Nebula Security zve\u0159ejnili informace o 18 zranitelnostech v j\u00e1d\u0159e Linux a p\u0159ipravili pro n\u011b exploity, kter\u00e9 umo\u017e\u0148uj\u00ed neprivilegovan\u00e9mu m\u00edstn\u00edmu u\u017eivateli z\u00edskat pr\u00e1va root v syst\u00e9mu. Zranitelnosti byly odstran\u011bny v r\u016fzn\u00fdch jarn\u00edch a letn\u00edch aktualizac\u00edch j\u00e1dra. Zji\u0161t\u011bn\u00e9 probl\u00e9my:  <\/p>\n<ul>\n<li class=\"l\"> CVE-2026-43502 (exploit) \u2014 zranitelnost v s\u00ed\u0165ov\u00e9m podsyst\u00e9mu RDS (Reliable Datagram Sockets), zp\u016fsoben\u00e1 nespr\u00e1vn\u00fdm vy\u010di\u0161t\u011bn\u00edm zadr\u017een\u00fdch str\u00e1nek pam\u011bti p\u0159i selh\u00e1n\u00ed odes\u00edl\u00e1n\u00ed dat v re\u017eimu zerocopy p\u0159ed um\u00edst\u011bn\u00edm zpr\u00e1vy do fronty. Probl\u00e9m byl pojmenov\u00e1n ZcopyReaper, projevuje se od verze j\u00e1dra 4.17 a byl odstran\u011bn v j\u00e1d\u0159e v kv\u011btnu. Zranitelnost je mo\u017en\u00e9 vyu\u017e\u00edt na syst\u00e9mech s j\u00e1drem sestaven\u00fdm s mo\u017enostmi CONFIG_INET=y, CONFIG_AIO=y, CONFIG_RDS=y|m a CONFIG_RDS_TCP=y|m (v\u011bt\u0161inou jsou nastaveny jako v\u00fdchoz\u00ed). Pro pr\u00e1ci s prostory jmenn\u00fdch identifik\u00e1tor\u016f u\u017eivatel\u016f k \u00fatoku nen\u00ed t\u0159eba m\u00edt pr\u00e1va. Pr\u00e1ce exploit byla demonstrov\u00e1na na openSUSE se standardn\u00edm j\u00e1drem 6.4.\n<li class=\"l\"> CVE-2026-80714 (exploit) \u2014 zranitelnost v podsyst\u00e9mu IPVS (IP Virtual Server), zp\u016fsoben\u00e1 p\u0159\u00edstupem k pam\u011bti po jej\u00edm uvoln\u011bn\u00ed kv\u016fli chybn\u00e9 konfiguraci p\u0159\u00edznaku IP_VS_CONN_F_ONE_PACKET p\u0159i synchronizaci p\u0159ipojen\u00ed, kter\u00e9 po vypr\u0161en\u00ed doby \u017eivotnosti p\u0159ipojen\u00ed vede k udr\u017een\u00ed vis\u00edc\u00edch ukazatel\u016f v hash tabulce odkazuj\u00edc\u00edch na ji\u017e uvoln\u011bnou strukturu ip_vs_conn. Probl\u00e9m byl odstran\u011bn 19. srpna. Pr\u00e1ce exploit byla demonstrov\u00e1na na Debian 13 s j\u00e1drem 6.12.\n<li class=\"l\"> CVE-2026-74597 (exploit) \u2014 zranitelnost v ovlada\u010di ip6_tunnel, zp\u016fsoben\u00e1 chybou p\u0159i aplikaci offsetu na encapsulovan\u00fd paket pro mo\u017enost HAO (Home Address Option), vypo\u010dten\u00e9ho na z\u00e1klad\u011b vn\u011bj\u0161\u00edho paketu. P\u0159enosem encapsulovan\u00e9ho paketu se speci\u00e1ln\u011b upraven\u00fdm z\u00e1hlav\u00edm lze dos\u00e1hnout z\u00e1pisu dat mimo vyhrazen\u00fd buffer. Probl\u00e9m byl odstran\u011bn 19. srpna. Pr\u00e1ce exploit byla demonstrov\u00e1na na CentOS s j\u00e1drem 6.12.\n<li class=\"l\"> CVE-2026-74581 (exploit) \u2014 zranitelnost v k\u00f3du pro pr\u00e1ci s tabulkami sm\u011brov\u00e1n\u00ed IPv6, zp\u016fsoben\u00e1 p\u0159\u00edstupem k pam\u011bti po jej\u00edm uvoln\u011bn\u00ed (po uvoln\u011bn\u00ed pam\u011bti pro trasu z\u016fstal aktivn\u00ed ukazatel na tuto trasu). Probl\u00e9m byl odstran\u011bn 19. srpna. Pr\u00e1ce exploit byla demonstrov\u00e1na na Debian 13 s j\u00e1drem 6.12.\n<li class=\"l\"> CVE-2026-74480 (exploit) \u2014 zranitelnost v podsyst\u00e9mu s\u00ed\u0165ov\u00fdch most\u016f, zp\u016fsoben\u00e1 p\u0159\u00edstupem k pam\u011bti po jej\u00edm uvoln\u011bn\u00ed v k\u00f3du p\u0159i v\u00fdstupu z multicastov\u00e9 skupiny (po odstran\u011bn\u00ed prvku ze spojov\u00e9ho seznamu cyklus nep\u0159estal a b\u011bhem iterac\u00ed doch\u00e1zelo k p\u0159\u00edstupu pomoc\u00ed ukazatele na seznam port\u016f, kter\u00fd z\u016fstal po odstran\u011bn\u00ed). Probl\u00e9m byl odstran\u011bn 9. srpna. Pr\u00e1ce exploit byla demonstrov\u00e1na na RHEL 10 s j\u00e1drem 6.12.\n<li class=\"l\"> CVE-2026-72255 (exploit) \u2014 zranitelnost v modulu nf_queue podsystemu netfilter, zp\u016fsoben\u00e1 p\u0159\u00edstupem k pam\u011bti po jej\u00edm uvoln\u011bn\u00ed, kter\u00fd nast\u00e1v\u00e1, pokud byl po odstran\u011bn\u00ed s\u00ed\u0165ov\u00e9ho mostu spojen\u00fd paket st\u00e1le ve front\u011b NFQUEUE. Probl\u00e9m byl vy\u0159e\u0161en 24. \u010dervence. Fungov\u00e1n\u00ed exploit bylo demonstrov\u00e1no v Ubuntu 26.04 s j\u00e1drem 7.0.\n<li class=\"l\"> CVE-2026-72137 (exploit) \u2014 zranitelnost v modulu IPSec XFRM, vedouc\u00ed k dvoj\u00edmu uvoln\u011bn\u00ed struktury skb p\u0159i chyb\u011b odes\u00edl\u00e1n\u00ed keepalive paketu. Probl\u00e9m byl vy\u0159e\u0161en 30. \u010dervna. Fungov\u00e1n\u00ed exploit bylo demonstrov\u00e1no v Ubuntu 26.04 s j\u00e1drem 7.0.\n<li class=\"l\"> CVE-2026-68376 (exploit) \u2014 zranitelnost v implementaci protokolu SCTP, vedouc\u00ed k p\u0159ete\u010den\u00ed bufferu kv\u016fli nespr\u00e1vn\u00e9mu v\u00fdpo\u010dtu velikosti pole pro uchov\u00e1n\u00ed HMAC identifik\u00e1tor\u016f. Probl\u00e9m byl vy\u0159e\u0161en 3. srpna. Fungov\u00e1n\u00ed exploit bylo demonstrov\u00e1no v Ubuntu 26.04 s j\u00e1drem 7.0.\n<li class=\"l\"> CVE-2026-68162 (exploit) \u2014 zranitelnost v implementaci protokolu SCTP, vedouc\u00ed k p\u0159\u00edstupu k pam\u011bti po jej\u00edm uvoln\u011bn\u00ed p\u0159i pokusu o zm\u011bnu parametru sysctl po uzav\u0159en\u00ed \u0159\u00edd\u00edc\u00edho socketu. Probl\u00e9m byl vy\u0159e\u0161en 10. dubna. Fungov\u00e1n\u00ed exploit bylo demonstrov\u00e1no v Ubuntu 26.04 s j\u00e1drem 7.0.\n<li class=\"l\"> CVE-2026-64560 (exploit) \u2014 zranitelnost v posix-cpu-timer, vedouc\u00ed k p\u0159\u00edstupu k pam\u011bti po jej\u00edm uvoln\u011bn\u00ed kv\u016fli z\u00e1vodn\u00ed podm\u00ednce mezi odstran\u011bn\u00edm \u010dasova\u010de a vol\u00e1n\u00edm exec() po zm\u011bn\u011b vedouc\u00edho procesu vl\u00e1kna. Probl\u00e9m byl vy\u0159e\u0161en 5. \u010dervence. Fungov\u00e1n\u00ed exploit bylo demonstrov\u00e1no na za\u0159\u00edzen\u00ed Google Pixel s platformou Android.\n<li class=\"l\"> CVE-2026-52933 (exploit) \u2014 zranitelnost v podsystemu io_uring, vedouc\u00ed p\u0159i nastaven\u00ed flagu IO_POLL_CANCEL_FLAG k p\u0159\u00edstupu k pam\u011bti po jej\u00edm uvoln\u011bn\u00ed kv\u016fli interpretaci hodnoty atomic_read() jako z\u00e1porn\u00e9ho \u010d\u00edsla p\u0159i porovn\u00e1v\u00e1n\u00ed se spo\u010dtem odkaz\u016f. Probl\u00e9m byl vy\u0159e\u0161en 15. dubna. Fungov\u00e1n\u00ed exploit bylo demonstrov\u00e1no v Fedora Linux s j\u00e1drem 6.19.\n<li class=\"l\"> CVE-2026-52924 (exploit) \u2014 zranitelnost v implementaci protokolu SCTP, vedouc\u00ed k p\u0159\u00edstupu k pam\u011bti po jej\u00edm uvoln\u011bn\u00ed kv\u016fli ponech\u00e1n\u00ed aktivn\u00edho ukazatele a dat ve front\u011b odes\u00edl\u00e1n\u00ed po uvoln\u011bn\u00ed tabulky proud\u016f po vzniku chyby \u201eStale Cookie\u201c. Probl\u00e9m byl vy\u0159e\u0161en 19. \u010dervna. Fungov\u00e1n\u00ed exploit bylo demonstrov\u00e1no v Ubuntu 26.04 s j\u00e1drem 7.0.\n<li class=\"l\"> CVE-2026-52923 (exploit) \u2014 zranitelnost v subsyst\u00e9mu SysV IPC, vedouc\u00ed k p\u0159\u00edstupu k pam\u011bti po jej\u00edm uvoln\u011bn\u00ed kv\u016fli ponech\u00e1n\u00ed vis\u00edc\u00edho ukazatele na uvoln\u011bn\u00fd prvek indexu ve struktu\u0159e IDR. Probl\u00e9m byl vy\u0159e\u0161en 24. \u010dervence. Fungov\u00e1n\u00ed exploit bylo demonstrov\u00e1no v RHEL 10 s j\u00e1drem 6.12.\n<li class=\"l\"> CVE-2026-52912 (exploit) \u2014 zranitelnost v modulu nf_queue subsyst\u00e9mu netfilter, zp\u016fsoben\u00e1 p\u0159\u00edstupem k pam\u011bti po jej\u00edm uvoln\u011bn\u00ed kv\u016fli nespr\u00e1vn\u00e9mu zpracov\u00e1n\u00ed ukazatele po odstran\u011bn\u00ed s\u00ed\u0165ov\u00e9ho mostu p\u0159i p\u0159\u00edtomnosti souvisej\u00edc\u00edch paket\u016f v \u0159ad\u011b NFQUEUE. Probl\u00e9m byl vy\u0159e\u0161en 1. \u010dervna. Fungov\u00e1n\u00ed exploit bylo demonstrov\u00e1no v openSUSE s j\u00e1drem 6.4.\n<li class=\"l\"> CVE-2026-43501 (exploit) \u2014 zranitelnost v k\u00f3du p\u0159epracov\u00e1n\u00ed hlavi\u010dek IPv6 SRH (Source Routing Header), vedouc\u00ed k z\u00e1pisu dat za hranice vyrovn\u00e1vac\u00ed pam\u011bti kv\u016fli absenci kontroly podm\u00ednek, za kter\u00fdch m\u016f\u017ee b\u00fdt nov\u00e1 hlavi\u010dka v\u011bt\u0161\u00ed ne\u017e star\u00e1. Probl\u00e9m byl vy\u0159e\u0161en 7. kv\u011btna. Fungov\u00e1n\u00ed exploit bylo demonstrov\u00e1no na sout\u011b\u017ei kernelCTF.\n<li class=\"l\"> CVE-2026-43042 (exploit) \u2014 zranitelnost v mechanismu MPLS, vedouc\u00ed k p\u0159\u00edstupu k dat\u016fm za hranicemi vyrovn\u00e1vac\u00ed pam\u011bti kv\u016fli z\u00e1vodn\u00ed podm\u00ednce, kter\u00e1 vznik\u00e1 p\u0159i sou\u010dasn\u00e9m \u010dten\u00ed z\u00e1mku a zm\u011bn\u011b velikosti tabulky. Probl\u00e9m byl vy\u0159e\u0161en 11. dubna. Fungov\u00e1n\u00ed exploit bylo demonstrov\u00e1no v Debian 13 s j\u00e1drem 6.12.\n<li class=\"l\"> CVE-2026-31678 (exploit) \u2014 zranitelnost v subsyst\u00e9mu openvswitch, zp\u016fsoben\u00e1 p\u0159\u00edstupem k pam\u011bti po jej\u00edm uvoln\u011bn\u00ed v z\u00e1vodn\u00ed podm\u00ednce p\u0159i odstran\u011bn\u00ed odkazu na s\u00ed\u0165ov\u00e9 za\u0159\u00edzen\u00ed p\u0159ed dokon\u010den\u00edm cyklu RCU (Read-Copy-Update). Probl\u00e9m byl vy\u0159e\u0161en 2. dubna. Fungov\u00e1n\u00ed exploit bylo demonstrov\u00e1no v Fedora Linux 44 s j\u00e1drem 6.19.\n<li class=\"l\"> CVE-2026-31659 (exploit) \u2014 zranitelnost v implementaci protokolu B.A.T.M.A.N. (Better Approach to Mobile Ad-hoc Networking), vedouc\u00ed k p\u0159ete\u010den\u00ed vyrovn\u00e1vac\u00ed pam\u011bti kv\u016fli celkov\u00e9mu p\u0159ete\u010den\u00ed zp\u016fsoben\u00e9mu pou\u017eit\u00edm 16bitov\u00fdch hodnot p\u0159i v\u00fdpo\u010dtu velikosti vyrovn\u00e1vac\u00ed pam\u011bti. Probl\u00e9m byl vy\u0159e\u0161en 18. dubna. Fungov\u00e1n\u00ed exploit bylo demonstrov\u00e1no v Arch Linux s j\u00e1drem 6.19.         <\/ul>\n<p>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=66239\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0418\u0441\u0441\u043b\u0435\u0434\u043e\u0432\u0430\u0442\u0435\u043b\u0438 \u0438\u0437 \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0438 Nebula Security \u0440\u0430\u0441\u043a\u0440\u044b\u043b\u0438 \u0441\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u043e 18 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044f\u0445 \u0432 \u044f\u0434\u0440\u0435 Linux \u0438 \u043f\u043e\u0434\u0433\u043e\u0442\u043e\u0432\u0438\u043b\u0438 \u0434\u043b\u044f \u043d\u0438\u0445 \u044d\u043a\u0441\u043f\u043b\u043e\u0438\u0442\u044b, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0435 \u043d\u0435\u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u043e\u043c\u0443 \u043b\u043e\u043a\u0430\u043b\u044c\u043d\u043e\u043c\u0443 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044e \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u043f\u0440\u0430\u0432\u0430 root \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0435. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u044b \u0432 \u0440\u0430\u0437\u043b\u0438\u0447\u043d\u044b\u0445 \u0432\u0435\u0441\u0435\u043d\u043d\u0438\u0445 \u0438 \u043b\u0435\u0442\u043d\u0438\u0445 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f\u0445 \u044f\u0434\u0440\u0430. \u0412\u044b\u044f\u0432\u043b\u0435\u043d\u043d\u044b\u0435 \u043f\u0440\u043e\u0431\u043b\u0435\u043c\u044b: CVE-2026-43502 (\u044d\u043a\u0441\u043f\u043b\u043e\u0438\u0442) &#8212; \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044c \u0432 \u0441\u0435\u0442\u0435\u0432\u043e\u0439 \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u0435 RDS (Reliable Datagram Sockets), \u0432\u044b\u0437\u0432\u0430\u043d\u043d\u0430\u044f \u043d\u0435\u043a\u043e\u0440\u0440\u0435\u043a\u0442\u043d\u043e\u0439 \u043e\u0447\u0438\u0441\u0442\u043a\u043e\u0439 \u0437\u0430\u043a\u0440\u0435\u043f\u043b\u0451\u043d\u043d\u044b\u0445 \u0441\u0442\u0440\u0430\u043d\u0438\u0446 \u043f\u0430\u043c\u044f\u0442\u0438 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":10,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-183301","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" 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