{"id":184020,"date":"2026-10-27T23:40:54","date_gmt":"2026-10-27T21:40:54","guid":{"rendered":"https:\/\/prohoster.info\/blog\/news\/10-uyazvimostej-v-yadre-linux-i-4-vo-freebsd-pozvolyayushhie-poluchit-prava-root-v-sisteme"},"modified":"2026-10-27T23:40:59","modified_gmt":"2026-10-27T21:40:59","slug":"10-linux-kernel-vulnerabilities-and-4-in-freebsd-that-allow-root-access","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/news\/10-linux-kernel-vulnerabilities-and-4-in-freebsd-that-allow-root-access","title":{"rendered":"10 haavat Linuxi tuumas ja 4 FreeBSD-s, mis v\u00f5imaldavad s\u00fcsteemis root-\u00f5igusi saada","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Linuxi ja FreeBSD tuumades on avastatud haavatavuste seeria. Linuxi haavatavused v\u00f5imaldavad kaugelt koodi k\u00e4ivitamist, t\u00f5sta s\u00fcsteemi \u00f5igusi, v\u00e4ljuda konteineritest v\u00f5i \u00fcletada virtuaalmasinate isolatsiooni. FreeBSD haavatavused v\u00f5imaldavad kaugelt tuuma t\u00f6\u00f6 l\u00f5petamist, t\u00f5sta s\u00fcsteemi \u00f5igusi ja \u00fcletada Bhyve h\u00fcperv\u00f5rgustiku isolatsiooni.<\/p>\n<p>Haavatavused Linuxi tuumas:<\/p>\n<ul>\n<li class=\"l\"> 5 haavatavust, mille avaldas Zero Day Initiative enne paranduste v\u00e4ljaandmist vale postitusloendi t\u00f5ttu:\n<ul>\n<li class=\"l\"> ZDI-CAN-33549 &#8212; haavatavus ksmbd moodulis, millel on failide rakendamine SMB protokolliga, mida saab \u00e4ra kasutada koodi kaugt\u00e4ideviimiseks kerneli tasandil. Probleem tuleneb t\u00e4isarvu \u00fclevoolust funktsioonis mbdirect_connection_rdma_xmit(), mis ilmneb, kui kernel on kompileeritud valikute &#171;CONFIG_SMB_SERVER_SMBDIRECT=y&#187; ja &#171;CONFIG_RDMA_RXE=y&#187; alusel. Eduka r\u00fcnnaku korral peab r\u00fcndaja saama kirjutada r\u00fcndatavas jagatud salvestuses. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/et\/server\/dts-los-angeles\/\"   title=\"serverid\" data-wpil-keyword-link=\"linked\">serverid<\/a> ZDI-CAN-33774 &#8212; konkurentsitingimus kerneli ksmbd moodulis, mis viib SMB1 protokolli jaoks eraldatud 40-baidise puhvers\u00e4tte kirjutamise 62 baitide andmetest SMB2 pealkirjast. Haavatavus v\u00f5ib viia koodi kaugt\u00e4ideviimiseni, kui p\u00e4\u00e4seb ligi SMB-salvestusele, mida t\u00f6\u00f6deldakse ksmbd kaudu. Ekspluateerimise protot\u00fc\u00fcp on saadaval, mis t\u00f6\u00f6tab Debian 13-s. <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/et\/server\/dts-prohoster\/\"   title=\"serverilt\" data-wpil-keyword-link=\"linked\">serverilt<\/a>, kus peavad olema samuti kasutusel RDMA ja SMB Direct tehnoloogiad. Protot\u00fc\u00fcp eksploitist, mis t\u00f6\u00f6tab Debian 13 all, on saadaval.\n<li class=\"l\"> ZDI-CAN-33367 &#8212; haavatavus kerneli v\u00f5rgu stackis, mis v\u00f5imaldab kohalikul kasutajal saada root-\u00f5iguseid s\u00fcsteemis, kirjutades protsessi andmed lehek\u00fcljecache'i, sarnanedes Dirty Frag ja Fragnesia haavatavustega. Seekord on probleem p\u00f5hjustatud veast funktsioonis.\n<li class=\"l\"> ZDI-CAN-34068 &#8212; puhversete \u00fclevool graafikadriveris VMWGFX, mida kasutatakse 3D-kiirenduse rakendamiseks VMware keskkondades. Probleem v\u00f5imaldab kohalikul kasutajal saada root-\u00f5iguseid s\u00fcsteemis, kui tal on juurdep\u00e4\u00e4s virtuaalsele GPU-le seadme kaudu \/dri\/card*. Ekspluateerimise protot\u00fc\u00fcp on saadaval, mis t\u00f6\u00f6tab Ubuntu 26.04-s.<br \/>\nskb_zerocopy(). Protot\u00fc\u00fcp eksploitist, mis t\u00f6\u00f6tab erinevates Ubuntu versioonides, on ette valmistatud. Parandus on saadaval patch'i kujul. Hetkel on ainult Alma Linuxi arendajad koostanud plaaniv\u00e4line tuuma paketimuudatus, milles on see haavatavus parandatud.<\/p>\n<li class=\"l\"> ZDI-CAN-34076 &#8212; haavatavus nvmet (NVMe Target) draiveris, mis viib tuvastamatut info leket kerneli m\u00e4llu.\n<li class=\"l\"> Avalikustatud teave ja protot\u00fc\u00fcbid viie haavatavuse kohta kernelis, mis v\u00f5imaldavad privileegideta kasutajal saada root-\u00f5igusi s\u00fcsteemis ja \u00fcletada konteinerite isoleerituse. Haavatuste kogumale on antud koodnimi &#171;Infinity Core&#187;. Probleemid on juba parandatud ajakohastes kerneli v\u00e4ljaannetes.\n<\/ul>\n<li class=\"l\"> CVE-2026-98260 &#8212; m\u00e4lu juurdep\u00e4\u00e4s p\u00e4rast vabastamist POSIX-ajastustruktuuri korduvkasutamise t\u00f5ttu, mille jaoks m\u00e4lu vabastati peamise l\u00f5ime poolt p\u00e4rast exec() kutse eba\u00f5nnestumist, kuid viide j\u00e4i teises l\u00f5imes j\u00e4rjekorda (timerqueue). Ekspluateerimise protot\u00fc\u00fcp on saadaval, mille t\u00f6\u00f6tamine on demonstreeritud Ubuntu 26.04-s ja Androidis Samsung Galaxy S26 Ultra nutitelefonis.\n<ul>\n<li class=\"l\"> CVE-2026-98260 \u2014 m\u00e4lu juurde p\u00e4\u00e4semine p\u00e4rast selle vabastamist POSIX-ajastuse struktuuri korduskasutamise t\u00f5ttu, mille m\u00e4luruum vabastati peavad jooksul p\u00e4rast exec() kutse eba\u00f5nnestumist, kuid viide j\u00e4i teises l\u00f5imes ootej\u00e4rjekorda (timerqueue). Eksploitimise protot\u00fc\u00fcp on saadaval, mille toimimist on demonstreeritud Ubuntu 26.04-s ja Androidis Samsung Galaxy S26 Ultra nutitelefonis.\n<li class=\"l\"> CVE-2026-98256 \u2014 m\u00e4lu kasutamine p\u00e4rast selle vabastamist, mis tuleneb v\u00f5istlusolukorrast exec() kutse vahel sekundaarse l\u00f5imes ja signaalij\u00e4rje (sigqueue), mis ootab t\u00f6\u00f6tlemist, puhastamise vahel. Signaalij\u00e4rjega manipuleerimisel v\u00f5ib tekkida olukord, kus viide signaalit\u00f6\u00f6tlejale j\u00e4\u00e4b j\u00e4rjekorda p\u00e4rast seotud m\u00e4lu vabastamist ja seda kasutatakse seej\u00e4rel signaalide t\u00f6\u00f6tlemisel. Exploiti toimimist demonstreeriti Ubuntu 26.04-s.\n<li class=\"l\"> CVE-2026-89754 \u2014 puhver\u00fclekanne s\u00fcsteemik\u00f5ne mincore() teostuses, mis tuleneb v\u00f5istlusolukorrast m\u00e4lulehe tabelite korduvate loenduste ajal p\u00e4rast madvise(MADV_DONTNEED) t\u00e4itmist. Exploiti toimimist demonstreeriti Ubuntu 26.04-s.\n<li class=\"l\"> CVE-2026-80775 \u2014 m\u00e4lu kasutamine p\u00e4rast selle vabastamist s\u00fcsteemik\u00f5nes prctl(), mis tuleneb vigasest viidete arvestamise j\u00e4lgimisest f\u00fctmendite hashide jaoks tekkimisel.<br \/>\nEkspiloit, mis kasutab seda haavatavust \/usr\/bin\/passwd \u00fcle kirjutamiseks lehe vahem\u00e4lus, on demonstreeritud Ubuntu 26.04.<\/p>\n<li class=\"l\"> CVE-2026-98385 \u2014 m\u00e4lu kasutamine p\u00e4rast selle vabastamist \u00fclesande ajakava\u00e4ristaja puhverduses, mis tuleneb sellest, et ajakava\u00e4ristaja uuendab statistika v\u00e4ljad mm_struct struktuuris \u00fclesande jaoks p\u00e4rast seotud m\u00e4lu vabastamist, kui teise CPU tuuma exec() kutse toimub. Haavatavus ilmneb tuumates, kus on aktiveeritud CONFIG_SCHED_CACHE valik. Exploiti toimimist demonstreeriti.<br \/>\nArch Linuxi tuumas 7.2.4.<\/p>\n<\/ul>\n<li class=\"l\"> Vghost haavatavus (CVE-2026-74580) vhost tuuma s\u00fcsteemis, mida kasutatakse Virtio kaudu I\/O operatsioonide kiirendamiseks virtualiseerimiss\u00fcsteemides. Haavatavus tuleneb vigasest IOTLB p\u00f6\u00f6rdustabelite vahe- h\u00e4\u00e4lestusest ja seda saab kasutada oma privileegide t\u00f5stmiseks s\u00fcsteemis ning k\u00fclgmen\u00fc\u00fcdest m\u00f6\u00f6dumiseks. Aadresside v\u00f5i vringide suuruste \u00fcmberh\u00e4\u00e4lestamisel VHOST_SET_VRING_ADDR v\u00f5i VHOST_SET_VRING_NUM kutsetega ei puhastatud vq-&gt;meta_iotlb[] puhvrit, mis viis uute aadresside t\u00f5lkimiseni, kasutades juba kehtetuks muutunud m\u00e4lu kaardistamise kirjeid.\n<p>Avalikustatud protot\u00fc\u00fcp root-\u00f5iguste saamiseks, testitud Ubuntu 26.04, RHEL 9.8, Amazon Linux 2023.12.20260817, Azure Linux 3.0 ja Oracle Linux 10.2 jaotustes.<br \/>\nHaavatavuse kasutamiseks v\u00f5ib olla v\u00f5imalik k\u00e4ivitada koodi host-s\u00fcsteemi tuuma tasemel, manipuleerides VIRTIO_F_RING_RESET kutsega k\u00fclaliss\u00fcsteemis virtualiseeritud keskkondades, kus on virtuaalne IOMMU.<br \/>\nProbleem ilmneb alates Linuxi tuumast 4.11 ja see on k\u00f5rvaldatud versioonides 5.10.265, 5.15.216, 6.1.183, 6.6.152, 6.12.104, 6.18.45, 7.1.9 ja 7.2. Kaitseks soovitatakse piirata juurdep\u00e4\u00e4su seadmetele \/dev\/vhost-net, \/dev\/vhost-vsock, \/dev\/vhost-scsi ja \/dev\/vhost-vdpa-*.<\/p>\n<\/ul>\n<p>FreeBSD haavatavused (korjatud versioonides 15.1-RELEASE-p5, 14.5-RELEASE-p2 ja 14.4-RELEASE-p11):<\/p>\n<ul>\n<li class=\"l\"> CVE-2026-101308 \u2014 m\u00e4lu kasutamine p\u00e4rast selle vabastamist sound draiveris, mis tuleneb v\u00f5istlusolukorrast puhveri suuruse muutmise ja m\u00e4lu mappimise operatsiooni vahel l\u00e4bi mmap. Haavatavus v\u00f5ib potentsiaalselt v\u00f5imaldada kohalikel kasutajatel, kellel on juurdep\u00e4\u00e4s heliseadmest, saada root \u00f5igusi.\n<li class=\"l\"> CVE-2026-101309, CVE-2026-101310, CVE-2026-101311 \u2014 haavatavused Bhyve h\u00fcpervaataja komponentides, mis v\u00f5imaldavad host-\u00fcmbritsevas koodis k\u00e4ivitada koodi k\u00fclaliss\u00fcsteemis. Probleemid on p\u00f5hjustatud puhverpiiride \u00fcletamisest xHCI (USB 3) kontrolleri mudeli l\u00f5ikes, samuti HDA (High Definition Audio) seadmete mudeli ja framebuffer'i puudulikest suuruse kontrollidest.\n<li class=\"l\"> CVE-2026-101307 \u2014 t\u00e4isarvu \u00fclevool tcp_rack moodulis, mis rakendab RACK (Recent ACKnowledgment) pakettide kaotuse m\u00e4\u00e4ramise algoritmi, mis viib puhveri reserveerimiseni, mis on liiga v\u00e4ike, et mahutada k\u00f5iki saadud andmeid. Haavatavus v\u00f5imaldab kirjutada kuni 512 kB puhvri piirest v\u00e4ljapoole, saates suures koguses ACK-pakette loodud TCP-\u00fchenduses. T m\u00e4rkides, et selle kasutamine v\u00f5ib p\u00f5hjustada tuuma kokkuvarisemise panic olekusse.\n<\/ul>\n<p>Allikas: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=66542\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0441\u0435\u0440\u0438\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 \u0432 \u044f\u0434\u0440\u0435 Linux \u0438 FreeBSD. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0432 Linux \u0434\u0430\u044e\u0442 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u043a\u043e\u0434, \u043f\u043e\u0434\u043d\u044f\u0442\u044c \u0441\u0432\u043e\u0438 \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0438 \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0435, \u0432\u044b\u0439\u0442\u0438 \u0438\u0437 \u043a\u043e\u043d\u0442\u0435\u0439\u043d\u0435\u0440\u043e\u0432 \u0438\u043b\u0438 \u043e\u0431\u043e\u0439\u0442\u0438 \u0438\u0437\u043e\u043b\u044f\u0446\u0438\u044e \u0432\u0438\u0440\u0442\u0443\u0430\u043b\u044c\u043d\u044b\u0445 \u043c\u0430\u0448\u0438\u043d. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0432\u043e FreeBSD \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0442 \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e \u043e\u0441\u0442\u0430\u043d\u043e\u0432\u0438\u0442\u044c \u0440\u0430\u0431\u043e\u0442\u0443 \u044f\u0434\u0440\u0430, \u043f\u043e\u0434\u043d\u044f\u0442\u044c \u0441\u0432\u043e\u0438 \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0438 \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0435 \u0438 \u043e\u0431\u043e\u0439\u0442\u0438 \u0438\u0437\u043e\u043b\u044f\u0446\u0438\u044e \u0433\u0438\u043f\u0435\u0440\u0432\u0438\u0437\u043e\u0440\u0430 Bhyve. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0432 \u044f\u0434\u0440\u0435 Linux: 5 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439, \u0440\u0430\u0441\u043a\u0440\u044b\u0442\u044b\u0445 \u043f\u0440\u043e\u0435\u043a\u0442\u043e\u043c [&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-184020","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - 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Linuxi haavatavused v\u00f5imaldavad kaugelt koodi t\u00e4ita, t\u00f5sta oma privileege s\u00fcsteemis, v\u00e4ljuda konteineritest v\u00f5i \u00fcletada virtuaalmasinate isoleerimist.","canonical_url":"https:\/\/prohoster.info\/et\/blog\/news\/10-linux-kernel-vulnerabilities-and-4-in-freebsd-that-allow-root-access","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\udd4710 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 \u0432 \u044f\u0434\u0440\u0435 Linux \u0438 4 \u0432\u043e FreeBSD, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0435 \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c \u043f\u0440\u0430\u0432\u0430 root \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0435 | ProHoster","og:description":"\u0412\u044b\u044f\u0432\u043b\u0435\u043d\u0430 \u0441\u0435\u0440\u0438\u044f \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 \u0432 \u044f\u0434\u0440\u0435 Linux \u0438 FreeBSD. \u0423\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0432 Linux \u0434\u0430\u044e\u0442 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u043a\u043e\u0434, \u043f\u043e\u0434\u043d\u044f\u0442\u044c \u0441\u0432\u043e\u0438 \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0438 \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0435, \u0432\u044b\u0439\u0442\u0438 \u0438\u0437 \u043a\u043e\u043d\u0442\u0435\u0439\u043d\u0435\u0440\u043e\u0432 \u0438\u043b\u0438 \u043e\u0431\u043e\u0439\u0442\u0438 \u0438\u0437\u043e\u043b\u044f\u0446\u0438\u044e \u0432\u0438\u0440\u0442\u0443\u0430\u043b\u044c\u043d\u044b\u0445 \u043c\u0430\u0448\u0438\u043d.","og:url":"https:\/\/prohoster.info\/et\/blog\/news\/10-linux-kernel-vulnerabilities-and-4-in-freebsd-that-allow-root-access","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":"2026-10-27T21:40:54+00:00","article:modified_time":"2026-10-27T21:40:59+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":[],"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/posts\/184020","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/users\/10"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/comments?post=184020"}],"version-history":[{"count":1,"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/posts\/184020\/revisions"}],"predecessor-version":[{"id":184021,"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/posts\/184020\/revisions\/184021"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/media?parent=184020"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/categories?post=184020"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/et\/wp-json\/wp\/v2\/tags?post=184020"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}