{"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\/no\/blog\/news\/serious-vulnerabilities-in-the-linux-kernel-kvm-exim-unbound-ghostscript-and-suricata","title":{"rendered":"Farlige s\u00e5rbarheter i Linux-kjernen, KVM, Exim, Unbound, Ghostscript og Suricata","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Flere nylig oppdagede s\u00e5rbarheter som gir root-tilgang i systemet eller muliggj\u00f8r ekstern kj\u00f8ring av kode.  <\/p>\n<ul>\n<li class=\"l\"> Informasjon er blitt avsl\u00f8rt om fire s\u00e5rbarheter i Linux-kjernen som gir en ikke-privilegert lokal bruker mulighet til \u00e5 kj\u00f8re kode med root-rettigheter. Problemene er blitt l\u00f8st i oppdateringene av Linux-kjernen 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.109, 6.18.50 og 7.2.4. Det er utviklet eksploitere for alle s\u00e5rbarheter, hvis drift er demonstrert i Fedora 43\/44 og Ubuntu 24.04. For \u00e5 utnytte de tre f\u00f8rste s\u00e5rbarhetene kreves det mulighet for \u00e5 opprette brukerromsnavn (user namespace) eller ha CAP_NET_ADMIN-rettigheter, samt aktivering av st\u00f8tte for subsystemer der s\u00e5rbarhetene er til stede (AH6\/XFRM, TUN, PPPoE og SCTP).\n<ul>\n<li class=\"l\"> DirtyAH6 (CVE-2026-80844, exploit) \u2014 buffer overflow in the IPsec AH (Authentication Header) handler, resulting from a lack of validation of values specified in the header. Apart from local exploitation, the vulnerability could theoretically be exploited remotely under specific conditions.\n<li class=\"l\"> TUNderflow (CVE-2026-81000, exploit) \u2014 out-of-bounds write when parsing incorrectly formatted TUN packets.\n<li class=\"l\"> PPPoEject (CVE-2026-68121, exploit) \u2014 accessing already freed memory in the PPPoE driver.\n<li class=\"l\"> DiagSpill (CVE-2026-74469, exploit) \u2014 buffer overflow in SCTP protocol diagnostic tools. In addition to local exploitation, the vulnerability could theoretically be exploited remotely under specific conditions.     <\/ul>\n<li class=\"l\"> S\u00e5rbarhet (CVE-2026-89775) i hypervisoren <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/no\/vps\/abuzoustojchivye-vps\/\" title=\"KVM\" data-wpil-keyword-link=\"linked\">KVM<\/a>, allowing access to the host environment from the guest system. If unprivileged users have access to the device \/dev\/kvm (by default in RHEL), the vulnerability can also be used to escalate privileges in the system. The issue only manifests on ARM64 architecture systems with nested virtualization support enabled. The vulnerability arises because the size calculation procedure returned '0', implying that the size was unknown, and the memory page free function treated '0' as the actual value and did not clear the memory pages.\n<li class=\"l\"> I utgivelsen av post <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/no\/server\/dts-los-angeles\/\" title=\"serveren\" data-wpil-keyword-link=\"linked\">serveren<\/a> Exim 4.100.1 har fjernet 4 s\u00e5rbarheder: l\u00e6sning af data uden for bufferomr\u00e5det og brug af uinitialiserede data i implementeringen af Proxy-protokollen; adgang til hukommelse efter frigivelse i TLS-on-connect med GnuTLS; inds\u00e6ttelse af meddelelser i en andens str\u00f8m (SMTP smuggling).\n<li class=\"l\"> I pakken Ghostscript 10.08.0 er der l\u00f8st en s\u00e5rbarhed (CVE-2026-39919), som blev for\u00e5rsaget af buffer-overl\u00f8b i koden til behandling af JPEG 2000-formatet ved angivelse af ugyldige v\u00e6rdier for sub-sampling. Problemet kan f\u00f8re til udf\u00f8relse af kode, n\u00e5r Ghostscript behandler specielt designede PDF-filer med integrerede billeder i JPEG 2000-format. Risikoen ved s\u00e5rbarheden forv\u00e6rres, da Ghostscript kaldes under oprettelse af miniaturebilleder p\u00e5 skrivebordet, ved baggrundsindeksering af data og ved konvertering af billeder. For at kunne udf\u00f8re et vellykket angreb er det ofte tilstr\u00e6kkeligt blot at indl\u00e6se en fil med et exploit eller se en mappe med den i Nautilus. S\u00e5rbarhederne i Ghostscript kan ogs\u00e5 udnyttes via billedebehandlere baseret p\u00e5 ImageMagick og GraphicsMagick ved at videregive en JPEG- eller PNG-fil, hvor koden i stedet for billedet findes i PostScript (s\u00e5dan en fil vil blive behandlet i Ghostscript, da MIME-typen genkendes ud fra indholdet og ikke er baseret p\u00e5 filtypen). Problemet er l\u00f8st i Ghostscript 10.08.0.\n<li class=\"l\"> I DNS-serveren Unbound 1.26.1 er der fjernet 9 s\u00e5rbarheder, herunder problemet CVE-2026-81642, der f\u00f8rer til buffer-overl\u00f8b ved behandling af bestemte DNSKEY. S\u00e5rbarheden kan bruges til fjernudf\u00f8relse af kode p\u00e5 <a class=\"wpil_keyword_link\" href=\"https:\/\/prohoster.info\/no\/server\/dts-dronten\/\" title=\"serveren\" data-wpil-keyword-link=\"linked\">serveren<\/a>. Desuden er der ogs\u00e5 fjernet: buffer-overl\u00f8b i koden til arbejde med DNSSEC, datakorruption i hukommelsen i CNAME-behandleren, adgang til allerede frigivet hukommelse i koden til DoQ og DoH.\n<li class=\"l\"> I systemet til opdagelse og forebyggelse af angreb Suricata 8.0.7 er der fjernet 67 s\u00e5rbarheder, hvoraf to er markeret som kritiske. Oplysninger om problemerne er endnu ikke blevet offentliggjort, men if\u00f8lge niveauet af fare tillader s\u00e5rbarhederne fjernudf\u00f8relse af kode ved behandling af s\u00e6rligt designet trafik.  <\/ul>\n<p>Kilde: <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 5.0.5 - 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 \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.\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Alexander Kovalev\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/prohoster.info\/no\/blog\/news\/serious-vulnerabilities-in-the-linux-kernel-kvm-exim-unbound-ghostscript-and-suricata\" \/>\n\t\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.5\" \/>\n\t\t<meta property=\"og:locale\" content=\"nn_NO\" \/>\n\t\t<meta property=\"og:site_name\" content=\"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\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"\ud83e\udd47\u041e\u043f\u0430\u0441\u043d\u044b\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0432 \u044f\u0434\u0440\u0435 Linux, KVM, Exim, Unbound, Ghostscript \u0438 Suricata | ProHoster\" \/>\n\t\t<meta property=\"og: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 \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.\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/prohoster.info\/no\/blog\/news\/serious-vulnerabilities-in-the-linux-kernel-kvm-exim-unbound-ghostscript-and-suricata\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg\" \/>\n\t\t<meta property=\"og:image:width\" content=\"350\" \/>\n\t\t<meta property=\"og:image:height\" content=\"350\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2026-09-20T08:54:15+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2026-09-20T08:54:15+00:00\" \/>\n\t\t<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"\ud83e\udd47Farlige s\u00e5rbarheder i Linux-kernen, KVM, Exim, Unbound, Ghostscript og Suricata | ProHoster","description":"Flere nylig oppdagede s\u00e5rbarheter som gir root-tilgang i systemet eller muliggj\u00f8r ekstern kj\u00f8ring av kode.","canonical_url":"https:\/\/prohoster.info\/no\/blog\/news\/serious-vulnerabilities-in-the-linux-kernel-kvm-exim-unbound-ghostscript-and-suricata","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"nn_NO","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\u041e\u043f\u0430\u0441\u043d\u044b\u0435 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438 \u0432 \u044f\u0434\u0440\u0435 Linux, KVM, Exim, Unbound, Ghostscript \u0438 Suricata | ProHoster","og:description":"\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.","og:url":"https:\/\/prohoster.info\/no\/blog\/news\/serious-vulnerabilities-in-the-linux-kernel-kvm-exim-unbound-ghostscript-and-suricata","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":"2026-09-20T08:54:15+00:00","article:modified_time":"2026-09-20T08:54:15+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":{"post_id":"183410","title":null,"description":null,"keywords":null,"keyphrases":{"focus":[],"additional":[]},"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"default","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":"default","schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"seo_analyzer_scan_date":null,"breadcrumb_settings":null,"limit_modified_date":false,"reviewed_by":null,"ai":null,"created":"2026-09-22 16:20:59","updated":"2026-09-22 16:20:59","focus_keyword":null,"additional_keywords":null,"truseo_locale":null},"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/no\/wp-json\/wp\/v2\/posts\/183410","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/no\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/no\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/no\/wp-json\/wp\/v2\/users\/10"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/no\/wp-json\/wp\/v2\/comments?post=183410"}],"version-history":[{"count":1,"href":"https:\/\/prohoster.info\/no\/wp-json\/wp\/v2\/posts\/183410\/revisions"}],"predecessor-version":[{"id":183425,"href":"https:\/\/prohoster.info\/no\/wp-json\/wp\/v2\/posts\/183410\/revisions\/183425"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/no\/wp-json\/wp\/v2\/media?parent=183410"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/no\/wp-json\/wp\/v2\/categories?post=183410"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/no\/wp-json\/wp\/v2\/tags?post=183410"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}