{"id":183410,"date":"2026-09-20T10:54:15","date_gmt":"2026-09-20T08:54:15","guid":{"rendered":"https:\/\/prohoster.info\/blog\/news\/opasnye-uyazvimosti-v-yadre-linux-kvm-exim-unbound-ghostscript-i-suricata"},"modified":"2026-09-20T10:54:15","modified_gmt":"2026-09-20T08:54:15","slug":"serious-vulnerabilities-in-the-linux-kernel-kvm-exim-unbound-ghostscript-and-suricata","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sl\/blog\/news\/serious-vulnerabilities-in-the-linux-kernel-kvm-exim-unbound-ghostscript-and-suricata","title":{"rendered":"Obstaja ranljivosti v jedru Linux, KVM, Exim, Unbound, Ghostscript in Suricata","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Nekaj nedavno odkritih nevarnih ranljivosti, ki omogo\u010dajo pridobitev root-dostopa v sistemu ali oddaljeno izvajanje kode.  <\/p>\n<ul>\n<li class=\"l\"> Razkriti so podatki o \u0161tirih ranljivostih v jedru Linux, ki neprivilegiranemu lokalnemu uporabniku omogo\u010dajo izvajanje kode z root pravicami. Te\u017eave so bile odpravljene v posodobitvah jedra Linux 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.109, 6.18.50 in 7.2.4. Za vse ranljivosti so bili pripravljeni eksploit, katerih delovanje je bilo prikazano v Fedora 43\/44 in Ubuntu 24.04. Za izkori\u0161\u010danje prvih treh ranljivosti je potrebno omogo\u010diti ustvarjanje prostora imen uporabni\u0161kih identifikatorjev (user namespace) ali imeti pravice CAP_NET_ADMIN, prav tako je treba omogo\u010diti podporo podse sistemom, v katerih so ranljivosti (AH6\/XFRM, TUN, PPPoE in SCTP).\n<ul>\n<li class=\"l\"> DirtyAH6 (CVE-2026-80844, exploit) \u2014 prelivanje baferja u IPsec AH (Authentication Header) handleru, do kojeg dolazi zbog nedostatka provjere navedenih vrijednosti u zaglavlju. Osim lokalnog provo\u0111enja napada, ranjivost se pod specifi\u010dnim uvjetima teoretski mo\u017ee iskoristiti daljinski.\n<li class=\"l\"> TUNderflow (CVE-2026-81000, exploit) \u2014 pisanje izvan dodijeljenog baferja prilikom obrade neispravno formiranog TUN paketa.\n<li class=\"l\"> PPPoEject (CVE-2026-68121, exploit) \u2014 pristup ve\u0107 oslobo\u0111enoj memoriji u PPPoE drajveru.\n<li class=\"l\"> DiagSpill (CVE-2026-74469, exploit) \u2014 prelivanje baferja u alatima za dijagnostiku SCTP protokola. Osim lokalnog provo\u0111enja napada, ranjivost se pod specifi\u010dnim uvjetima teoretski mo\u017ee iskoristiti daljinski.     <\/ul>\n<li class=\"l\"> Ranljivost (CVE-2026-89775) v hipervizorju <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/sl\/vps\/abuzoustojchivye-vps\/\" title=\"KVM\" data-wpil-keyword-link=\"linked\">KVM<\/a>, omogu\u0107avaju\u0107i pristup host okru\u017eenju iz gostuju\u0107eg sistema. Ako neprivilegirani korisnici imaju pristup ure\u0111aju \/dev\/kvm (podrazumevano u RHEL), ranjivost se tako\u0111e mo\u017ee iskoristiti za povi\u0161enje privilegija u sistemu. Problem se javlja samo na ARM64 arhitekturama sa uklju\u010denom podr\u0161kom za ugnije\u017e\u0111enu virtualizaciju. Ranjivost je uzrokovana time \u0161to je procedura za izra\u010dunavanje veli\u010dine vra\u0107ala \u201e0\u201c, podrazumevaju\u0107i da je veli\u010dina nepoznata, a funkcija za osloba\u0111anje stranica memorije obra\u0111ivala je \u201e0\u201c kao stvarnu vrijednost i nije \u010distila stranice memorije.\n<li class=\"l\"> V izdanju po\u0161tnega <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/sl\/server\/dts-los-angeles\/\" title=\"stre\u017enika\" data-wpil-keyword-link=\"linked\">stre\u017enika<\/a> Exim 4.100.1 has fixed 4 vulnerabilities: reading data from out-of-bounds buffer and using uninitialized data in the Proxy protocol implementation; accessing memory after it has been freed in TLS-on-connect when using GnuTLS; inserting a message into another stream (SMTP smuggling).\n<li class=\"l\"> The Ghostscript 10.08.0 package has addressed a vulnerability (CVE-2026-39919) caused by a buffer overflow in the code for parsing the JPEG 2000 format when improper sub-sampling values are specified. This issue can lead to code execution when processing specially crafted PDF files with embedded JPEG 2000 images in Ghostscript. The risk of the vulnerability is heightened by the fact that Ghostscript is invoked during thumbnail creation on the desktop, during background data indexing, and when converting images. For a successful attack, it is often sufficient to simply upload a file with an exploit or browse a directory containing it in Nautilus. Vulnerabilities in Ghostscript can also be exploited through image handlers based on ImageMagick and GraphicsMagick by passing them a JPEG or PNG file containing PostScript code instead of an image (this file will be processed in Ghostscript, as the MIME type is recognized by content rather than relying on the extension). The issue has been fixed in Ghostscript 10.08.0.\n<li class=\"l\"> The Unbound DNS server version 1.26.1 has patched 9 vulnerabilities, including the CVE-2026-81642 issue, which leads to a buffer overflow while processing certain DNSKEY records. This vulnerability can be used for remote code execution on <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/sl\/server\/dts-dronten\/\" title=\"stre\u017enikom\" data-wpil-keyword-link=\"linked\">stre\u017enikom<\/a>. Other issues fixed include: buffer overflow in the DNSSEC processing code, memory corruption in the CNAME handler, and accessing already freed memory in the DoQ and DoH code.\n<li class=\"l\"> In the Suricata intrusion detection and prevention system version 8.0.7, 67 vulnerabilities have been addressed, two of which are marked as critical. Details of these issues have not yet been disclosed, but given the severity level, the vulnerabilities allow for remote code execution when processing specially crafted traffic.  <\/ul>\n<p>Izvor: <a rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=66310\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u043e \u043d\u0435\u0434\u0430\u0432\u043d\u043e \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u043d\u044b\u0445 \u043e\u043f\u0430\u0441\u043d\u044b\u0445 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0445 \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c root-\u0434\u043e\u0441\u0442\u0443\u043f \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0435 \u0438\u043b\u0438 \u0434\u043e\u0431\u0438\u0442\u044c\u0441\u044f \u0443\u0434\u0430\u043b\u0451\u043d\u043d\u043e\u0433\u043e \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f \u043a\u043e\u0434\u0430. \u0420\u0430\u0441\u043a\u0440\u044b\u0442\u044b \u0441\u0432\u0435\u0434\u0435\u043d\u0438\u044f \u043e \u0447\u0435\u0442\u044b\u0440\u0451\u0445 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u044f\u0445 \u0432 \u044f\u0434\u0440\u0435 Linux, \u0434\u0430\u044e\u0449\u0438\u0445 \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 \u0432\u043e\u0437\u043c\u043e\u0436\u043d\u043e\u0441\u0442\u044c \u0432\u044b\u043f\u043e\u043b\u043d\u0438\u0442\u044c \u043a\u043e\u0434 \u0441 \u043f\u0440\u0430\u0432\u0430\u043c\u0438 root. \u041f\u0440\u043e\u0431\u043b\u0435\u043c\u044b \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u044b \u0432 \u043e\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u044f\u0445 \u044f\u0434\u0440\u0430 Linux 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.109, 6.18.50 \u0438 7.2.4. \u0414\u043b\u044f \u0432\u0441\u0435\u0445 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 \u043f\u043e\u0434\u0433\u043e\u0442\u043e\u0432\u043b\u0435\u043d\u044b \u044d\u043a\u0441\u043f\u043b\u043e\u0438\u0442\u044b, \u0440\u0430\u0431\u043e\u0442\u0430 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u043f\u0440\u043e\u0434\u0435\u043c\u043e\u043d\u0441\u0442\u0440\u0438\u0440\u043e\u0432\u0430\u043d\u0430 [&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-183410","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u043e \u043d\u0435\u0434\u0430\u0432\u043d\u043e \u0432\u044b\u044f\u0432\u043b\u0435\u043d\u043d\u044b\u0445 \u043e\u043f\u0430\u0441\u043d\u044b\u0445 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0438\u0445 \u043f\u043e\u043b\u0443\u0447\u0438\u0442\u044c root-\u0434\u043e\u0441\u0442\u0443\u043f \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0435 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