{"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\/hu\/blog\/news\/18-linux-kernel-vulnerabilities-with-exploits-to-gain-root-access","title":{"rendered":"18 sebezhet\u0151s\u00e9g a Linux magj\u00e1ban, amelyeket root jogosults\u00e1gok megszerz\u00e9s\u00e9re haszn\u00e1lnak ki","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>A Nebula Security kutat\u00f3csoport nyilv\u00e1noss\u00e1gra hozta a Linux kernelben tal\u00e1lhat\u00f3 18 sebezhet\u0151s\u00e9g r\u00e9szleteit, \u00e9s k\u00e9sz\u00edtettek hozz\u00e1juk olyan exploitokat, amelyek lehet\u0151v\u00e9 teszik, hogy egy nem privil\u00e9giz\u00e1lt helyi felhaszn\u00e1l\u00f3 root jogokat szerezzen a rendszerben. A sebezhet\u0151s\u00e9geket k\u00fcl\u00f6nb\u00f6z\u0151 tavaszi \u00e9s ny\u00e1ri kernelfriss\u00edt\u00e9sekben jav\u00edtott\u00e1k. Az azonos\u00edtott probl\u00e9m\u00e1k:  <\/p>\n<ul>\n<li class=\"l\"> CVE-2026-43502 (exploitable) \u2014 hiba a RDS (Reliable Datagram Sockets) h\u00e1l\u00f3zati alrendszer\u00e9ben, amely a mem\u00f3ria adatlapok helytelen t\u00f6rl\u00e9s\u00e9b\u0151l ad\u00f3dik a zerocopy m\u00f3d\u00fa adatk\u00fcld\u00e9s sor\u00e1n, a \u00fczenet sorba \u00e1ll\u00edt\u00e1sa el\u0151tti f\u00e1zisban. A probl\u00e9ma ZcopyReaper k\u00f3dnevet kapott, a 4.17-es kernel verzi\u00f3t\u00f3l kezdve jelentkezik, \u00e9s a hib\u00e1t m\u00e1jusban jav\u00edtott\u00e1k. A sebezhet\u0151s\u00e9g kiakn\u00e1z\u00e1sa lehets\u00e9ges a CONFIG_INET=y, CONFIG_AIO=y, CONFIG_RDS=y|m \u00e9s CONFIG_RDS_TCP=y|m opci\u00f3kkal \u00f6ssze\u00e1ll\u00edtott kernel\u0171 rendszereken (ezek \u00e1ltal\u00e1ban alapbe\u00e1ll\u00edt\u00e1sk\u00e9nt vannak kiv\u00e1lasztva). Az azonos\u00edt\u00f3k n\u00e9vt\u00e9rrel val\u00f3 munkav\u00e9gz\u00e9shez jogok nem sz\u00fcks\u00e9gesek. Az exploit m\u0171k\u00f6d\u00e9s\u00e9t openSUSE alatt, az alap\u00e9rtelmezett 6.4-es kernelrel demonstr\u00e1lt\u00e1k.\n<li class=\"l\"> CVE-2026-80714 (exploitable) \u2014 hiba az IPVS (IP Virtual Server) alrendszer\u00e9ben, amely a mem\u00f3ria felszabad\u00edt\u00e1sa ut\u00e1ni hozz\u00e1f\u00e9r\u00e9sb\u0151l ad\u00f3dik a hiba k\u00f6vetkezt\u00e9ben, amely az IP_VS_CONN_F_ONE_PACKET z\u00e1szl\u00f3 hib\u00e1s be\u00e1ll\u00edt\u00e1s\u00e1hoz vezetett a kapcsolatok szinkroniz\u00e1l\u00e1sa sor\u00e1n. Ez a kapcsolat \u00e9lettartam\u00e1nak lej\u00e1rta ut\u00e1n az el\u0151z\u0151leg felszabad\u00edtott ip_vs_conn strukt\u00far\u00e1ra mutat\u00f3 felesleges mutat\u00f3k megmarad\u00e1s\u00e1t eredm\u00e9nyezi a hash t\u00e1bl\u00e1zatban. A probl\u00e9m\u00e1t augusztus 19-\u00e9n orvosolt\u00e1k. Az exploit m\u0171k\u00f6d\u00e9s\u00e9t Debian 13 alatt, a 6.12-es kernel mellett demonstr\u00e1lt\u00e1k.\n<li class=\"l\"> CVE-2026-74597 (exploitable) \u2014 hiba az ip6_tunnel meghajt\u00f3ban, amely a HAO (Home Address Option) opci\u00f3ra vonatkoz\u00f3 eltol\u00e1s hib\u00e1s alkalmaz\u00e1s\u00e1b\u00f3l fakad, amelyet a k\u00fcls\u0151 csomag alapj\u00e1n sz\u00e1moltak ki. Egy speci\u00e1lisan form\u00e1zott fejl\u00e9c\u0171 kapszul\u00e1zott csomag \u00e1tad\u00e1s\u00e1val lehet\u0151v\u00e9 v\u00e1lik az adatok \u00edr\u00e1sa a lefoglalt pufferen k\u00edv\u00fcl. A probl\u00e9m\u00e1t augusztus 19-\u00e9n orvosolt\u00e1k. Az exploit m\u0171k\u00f6d\u00e9s\u00e9t CentOS alatt, a 6.12-es kernel mellett demonstr\u00e1lt\u00e1k.\n<li class=\"l\"> CVE-2026-74581 (exploitable) \u2014 hiba az IPv6 routing t\u00e1bl\u00e1k kezel\u00e9s\u00e9re szolg\u00e1l\u00f3 k\u00f3dban, amely a mem\u00f3ria felszabad\u00edt\u00e1sa ut\u00e1ni hozz\u00e1f\u00e9r\u00e9sb\u0151l ad\u00f3dik (a mem\u00f3ria felszabad\u00edt\u00e1sa ut\u00e1n egy akt\u00edv mutat\u00f3 maradt a marad\u00e9kra). A probl\u00e9m\u00e1t augusztus 19-\u00e9n orvosolt\u00e1k. Az exploit m\u0171k\u00f6d\u00e9s\u00e9t Debian 13 alatt, a 6.12-es kernel mellett demonstr\u00e1lt\u00e1k.\n<li class=\"l\"> CVE-2026-74480 (exploitable) \u2014 hiba a h\u00e1l\u00f3zati h\u00edd alrendszer\u00e9ben, amely a mem\u00f3ria felszabad\u00edt\u00e1sa ut\u00e1ni hozz\u00e1f\u00e9r\u00e9sb\u0151l ad\u00f3dik a multicast csoportb\u00f3l val\u00f3 kil\u00e9p\u00e9s sor\u00e1n (az elemek elt\u00e1vol\u00edt\u00e1sa ut\u00e1n a ciklus nem szakadt meg, \u00e9s az iter\u00e1ci\u00f3k sor\u00e1n hivatkoz\u00e1s t\u00f6rt\u00e9nt a m\u00e1r t\u00f6r\u00f6lt lista marad\u00e9k portjaira mutat\u00f3 mutat\u00f3ra). A probl\u00e9m\u00e1t augusztus 9-\u00e9n orvosolt\u00e1k. Az exploit m\u0171k\u00f6d\u00e9s\u00e9t RHEL 10 alatt, a 6.12-es kernel mellett demonstr\u00e1lt\u00e1k.\n<li class=\"l\"> CVE-2026-72255 (exploit) \u2014 a vulnerability in the nf_queue module of the netfilter subsystem, caused by accessing memory after it has been freed, occurring when, after the removal of a network bridge, the associated packet was still in the NFQUEUE. The issue was resolved on July 24. The exploit was demonstrated on Ubuntu 26.04 with kernel 7.0.\n<li class=\"l\"> CVE-2026-72137 (exploit) \u2014 a vulnerability in the IPSec XFRM module, leading to double freeing of the skb structure when there's a failure sending a keepalive packet. The issue was fixed on June 30. The exploit was demonstrated on Ubuntu 26.04 with kernel 7.0.\n<li class=\"l\"> CVE-2026-68376 (exploit) \u2014 a vulnerability in the SCTP protocol implementation, leading to a buffer overflow due to incorrect size calculation for storing HMAC identifiers. The issue was addressed on August 3. The exploit was demonstrated on Ubuntu 26.04 with kernel 7.0.\n<li class=\"l\"> CVE-2026-68162 (exploit) \u2014 a vulnerability in the SCTP protocol implementation, leading to accessing memory after it has been freed when trying to modify a sysctl parameter after closing the controlling socket. The issue was resolved on April 10. The exploit was demonstrated on Ubuntu 26.04 with kernel 7.0.\n<li class=\"l\"> CVE-2026-64560 (exploit) \u2014 a vulnerability in posix-cpu-timer, leading to accessing memory after it has been freed due to a race condition between timer deletion and the exec() call after changing the thread group leader. The issue was fixed on July 5. The exploit was demonstrated on a Google Pixel device with the Android platform.\n<li class=\"l\"> CVE-2026-52933 (exploit) \u2014 a vulnerability in the io_uring subsystem, leading to accessing memory after it has been freed when setting the IO_POLL_CANCEL_FLAG due to interpreting the atomic_read() value as a negative number when compared to the reference counter. The issue was resolved on April 15. The exploit was demonstrated on Fedora Linux with kernel 6.19.\n<li class=\"l\"> CVE-2026-52924 (exploit) \u2014 a vulnerability in the SCTP protocol implementation, causing access to memory after it has been freed due to leaving an active pointer and data in the sending queue after freeing the stream table following a 'Stale Cookie' error. The issue was fixed on June 19. The exploit was demonstrated on Ubuntu 26.04 with kernel 7.0.\n<li class=\"l\"> CVE-2026-52923 (exploit) \u2014 egy sebezhet\u0151s\u00e9g a SysV IPC alrendszer\u00e9ben, amely mem\u00f3riahivatkoz\u00e1st okoz a mem\u00f3ria felszabad\u00edt\u00e1sa ut\u00e1n, mivel a felszabad\u00edtott indexelemre mutat\u00f3 l\u00f3g\u00f3 mutat\u00f3 marad az IDR strukt\u00far\u00e1ban. A probl\u00e9m\u00e1t j\u00falius 24-\u00e9n orvosolt\u00e1k. Az exploit m\u0171k\u00f6d\u00e9s\u00e9t a RHEL 10 rendszeren, 6.12-es kernel alatt mutatt\u00e1k be.\n<li class=\"l\"> CVE-2026-52912 (exploit) \u2014 egy sebezhet\u0151s\u00e9g a netfilter nf_queue modulj\u00e1ban, amely mem\u00f3riahivatkoz\u00e1st okoz a mem\u00f3ria felszabad\u00edt\u00e1sa ut\u00e1n, mivel a h\u00e1l\u00f3zati h\u00edd elt\u00e1vol\u00edt\u00e1sa ut\u00e1n l\u00e9v\u0151 mutat\u00f3 helytelen kezel\u00e9se miatt a kapcsol\u00f3d\u00f3 csomagok a NFQUEUE sorban maradnak. A probl\u00e9m\u00e1t j\u00fanius 1-j\u00e9n orvosolt\u00e1k. Az exploit m\u0171k\u00f6d\u00e9s\u00e9t openSUSE alatt, 6.4-es kernel mellett mutatt\u00e1k be.\n<li class=\"l\"> CVE-2026-43501 (exploit) \u2014 egy sebezhet\u0151s\u00e9g az IPv6 SRH (Source Routing Header) fejl\u00e9c \u00fajracsomagol\u00f3 k\u00f3dj\u00e1ban, amely adatokat \u00edr a pufferen k\u00edv\u00fcl, mivel nem ellen\u0151rzik azokat a felt\u00e9teleket, amelyek mellett az \u00faj fejl\u00e9c nagyobb lehet, mint a r\u00e9gi. A probl\u00e9m\u00e1t m\u00e1jus 7-\u00e9n orvosolt\u00e1k. Az exploit m\u0171k\u00f6d\u00e9s\u00e9t a kernelCTF versenyen mutatt\u00e1k be.\n<li class=\"l\"> CVE-2026-43042 (exploit) \u2014 egy sebezhet\u0151s\u00e9g az MPLS mechanizmusban, amely adatokat hivatkozik a pufferen k\u00edv\u00fcl, mivel versenyhelyzet l\u00e9p fel a z\u00e1rol\u00e1s egyidej\u0171 olvas\u00e1sa \u00e9s a t\u00e1bl\u00e1zat m\u00e9ret\u00e9nek megv\u00e1ltoztat\u00e1sa sor\u00e1n. A probl\u00e9m\u00e1t \u00e1prilis 11-\u00e9n orvosolt\u00e1k. Az exploit m\u0171k\u00f6d\u00e9s\u00e9t a Debian 13 rendszeren, 6.12-es kernel alatt mutatt\u00e1k be.\n<li class=\"l\"> CVE-2026-31678 (exploit) \u2014 egy sebezhet\u0151s\u00e9g az openvswitch alrendszer\u00e9ben, amely mem\u00f3riahivatkoz\u00e1st okoz a mem\u00f3ria felszabad\u00edt\u00e1sa ut\u00e1n, egy versenyhelyzet k\u00f6vetkezt\u00e9ben, miut\u00e1n a hivatkoz\u00e1s a h\u00e1l\u00f3zati eszk\u00f6zr\u0151l a RCU (Read-Copy-Update) ciklus befejez\u00e9se el\u0151tt t\u00f6rl\u00e9sre ker\u00fclt. A probl\u00e9m\u00e1t \u00e1prilis 2-\u00e1n orvosolt\u00e1k. Az exploit m\u0171k\u00f6d\u00e9s\u00e9t Fedora Linux 44 alatt, 6.19-es kernel mellett mutatt\u00e1k be.\n<li class=\"l\"> CVE-2026-31659 (exploit) \u2014 egy sebezhet\u0151s\u00e9g a B.A.T.M.A.N. (Better Approach to Mobile Ad-hoc Networking) protokoll megval\u00f3s\u00edt\u00e1s\u00e1ban, amely puffer t\u00falcsordul\u00e1st okoz eg\u00e9sz sz\u00e1m\u00fa t\u00falcsordul\u00e1s miatt, mivel 16 bites \u00e9rt\u00e9keket haszn\u00e1lnak a puffer m\u00e9ret\u00e9nek kisz\u00e1m\u00edt\u00e1s\u00e1hoz. A probl\u00e9m\u00e1t \u00e1prilis 18-\u00e1n orvosolt\u00e1k. Az exploit m\u0171k\u00f6d\u00e9s\u00e9t Arch Linux alatt, 6.19-es kernel mellett mutatt\u00e1k be.         <\/ul>\n<p>Forr\u00e1s: <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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