{"id":182538,"date":"2026-07-08T10:54:06","date_gmt":"2026-07-08T08:54:06","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/obnovlenie-x-org-server-21-1-24-xwayland-24-1-13-i-libxfont2-2-0-8-s-ustraneniem-uyazvimostej"},"modified":"2026-07-08T10:54:06","modified_gmt":"2026-07-08T08:54:06","slug":"obnovlenie-x-org-server-21-1-24-xwayland-24-1-13-i-libxfont2-2-0-8-s-ustraneniem-uyazvimostej","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/news\/obnovlenie-x-org-server-21-1-24-xwayland-24-1-13-i-libxfont2-2-0-8-s-ustraneniem-uyazvimostej","title":{"rendered":"Aktualizace X.Org Server 21.1.24, xwayland 24.1.13 a libXfont2 2.0.8 s odstran\u011bn\u00edm zranitelnost\u00ed","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Byly zve\u0159ejn\u011bny opravy X.Org Serveru 21.1.24 a DDX komponenty (Device-Dependent X) xwayland 24.1.13, kter\u00e9 umo\u017e\u0148uj\u00ed spu\u0161t\u011bn\u00ed X.Org Serveru pro prov\u00e1d\u011bn\u00ed X11 aplikac\u00ed v prost\u0159ed\u00edch zalo\u017een\u00fdch na Waylandu. Nov\u00e9 verze odstra\u0148uj\u00ed 2 zranitelnosti, kter\u00e9 mohou b\u00fdt potenci\u00e1ln\u011b zneu\u017eity k z\u00edsk\u00e1n\u00ed vy\u0161\u0161\u00edch opr\u00e1vn\u011bn\u00ed v syst\u00e9mech, kde b\u011b\u017e\u00ed X-server s pr\u00e1vy root, a tak\u00e9 pro vzd\u00e1len\u00e9 spu\u0161t\u011bn\u00ed k\u00f3du v konfigurac\u00edch, kde se p\u0159istupuje k p\u0159esm\u011brov\u00e1n\u00ed relace X11 pomoc\u00ed SSH.       <\/p>\n<p>Opraven\u00e9 zranitelnosti:   <\/p>\n<ul>\n<li class=\"l\"> CVE-2026-55999 \u2014 p\u0159ete\u010den\u00ed vyrovn\u00e1vac\u00ed pam\u011bti v implementaci 2D akcelerace Glamor, t\u00fdkaj\u00edc\u00ed se funkce glamor_font_get(), kter\u00e1 vykresluje texturov\u00fd atlas p\u00edsma prost\u0159ednictv\u00edm vykreslov\u00e1n\u00ed ka\u017ed\u00e9ho glifu v jednom spole\u010dn\u00e9m vyrovn\u00e1vac\u00ed pam\u011bti. Probl\u00e9m je zp\u016fsoben t\u00edm, \u017ee velikost vyrovn\u00e1vac\u00ed pam\u011bti byla ur\u010dena na z\u00e1klad\u011b parametr\u016f specifikovan\u00fdch v p\u00edsmu, zat\u00edmco p\u0159i vytv\u00e1\u0159en\u00ed kopie dat do vyrovn\u00e1vac\u00ed pam\u011bti byly pou\u017eity individu\u00e1ln\u00ed metriky ka\u017ed\u00e9ho glifu. K vyko\u0159is\u0165ov\u00e1n\u00ed zranitelnosti m\u016f\u017ee \u00fato\u010dn\u00edk p\u0159ipravit speci\u00e1ln\u011b vytvo\u0159en\u00fd soubor ve form\u00e1tu PCF, ve kter\u00e9m jsou zad\u00e1ny nespr\u00e1vn\u00e9 metriky glifu, kter\u00e9 p\u0159esahuj\u00ed vyhrazenou velikost pam\u011bti. P\u0159ete\u010den\u00ed nast\u00e1v\u00e1 na syst\u00e9mech pou\u017e\u00edvaj\u00edc\u00edch backend glamor (Xorg s ovlada\u010dem modesetting a Xwayland) p\u0159i vykreslov\u00e1n\u00ed textu probl\u00e9mov\u00fdm p\u00edsmem.\n<li class=\"l\"> CVE-2026-56000 \u2014 p\u0159\u00edstup k pam\u011bti po jej\u00edm uvoln\u011bn\u00ed ve funkci CommonMakeCurrent() p\u0159i zpracov\u00e1n\u00ed GLX contextTags. Probl\u00e9m je zp\u016fsoben t\u00edm, \u017ee p\u0159i pou\u017eit\u00ed funkce realloc() se data pole cl-&gt;contextTags p\u0159esunula do nov\u00e9ho vyrovn\u00e1vac\u00ed pam\u011bti, ale v ob\u011bhu z\u016fstala ukazatel odkazuj\u00edc\u00ed na star\u00fd vyrovn\u00e1vac\u00ed pam\u011bti. K iniciaci p\u0159esunu vyrovn\u00e1vac\u00ed pam\u011bti mohl klient obsadit v\u0161echny vyhrazen\u00e9 prvky pole pro GLX kontext, a pot\u00e9 vytvo\u0159it je\u0161t\u011b jeden dodate\u010dn\u00fd kontext.       <\/ul>\n<p>D\u00e1le lze zm\u00ednit vyd\u00e1n\u00ed knihovny libXfont 2.0.8, kter\u00e1 se pou\u017e\u00edv\u00e1 v X-serveru. V aktualizaci byly odstran\u011bny 3 zranitelnosti (CVE-2026-56001, CVE-2026-56002, CVE-2026-56003), kter\u00e9 vedou k p\u0159ete\u010den\u00ed vyrovn\u00e1vac\u00ed pam\u011bti p\u0159i anal\u00fdze speci\u00e1ln\u011b vytvo\u0159en\u00fdch p\u00edsem ve form\u00e1tu PCF.<br \/>\n<br \/>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=65863\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u044b \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0435 \u0432\u044b\u043f\u0443\u0441\u043a\u0438 X.Org Server 21.1.24 \u0438 DDX-\u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u0430 (Device-Dependent X) xwayland 24.1.13, \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0438\u0432\u0430\u044e\u0449\u0435\u0433\u043e \u0437\u0430\u043f\u0443\u0441\u043a X.Org Server \u0434\u043b\u044f \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u0430\u0446\u0438\u0438 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f X11-\u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u0432 \u043e\u043a\u0440\u0443\u0436\u0435\u043d\u0438\u044f\u0445 \u043d\u0430 \u0431\u0430\u0437\u0435 Wayland. \u0412 \u043d\u043e\u0432\u044b\u0445 \u0432\u0435\u0440\u0441\u0438\u044f\u0445 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u044b 2 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438, \u043a\u043e\u0442\u043e\u0440\u044b\u0435 \u043f\u043e\u0442\u0435\u043d\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043c\u043e\u0433\u0443\u0442 \u0431\u044b\u0442\u044c \u044d\u043a\u0441\u043f\u043b\u0443\u0430\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u044b \u0434\u043b\u044f \u043f\u043e\u0432\u044b\u0448\u0435\u043d\u0438\u044f \u043f\u0440\u0438\u0432\u0438\u043b\u0435\u0433\u0438\u0439 \u0432 \u0441\u0438\u0441\u0442\u0435\u043c\u0430\u0445, \u0432 \u043a\u043e\u0442\u043e\u0440\u044b\u0445 X-\u0441\u0435\u0440\u0432\u0435\u0440 \u0432\u044b\u043f\u043e\u043b\u043d\u044f\u0435\u0442\u0441\u044f \u0441 \u043f\u0440\u0430\u0432\u0430\u043c\u0438 root, \u0430 \u0442\u0430\u043a\u0436\u0435 \u0434\u043b\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 \u0432 [&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-182538","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\" content=\"\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u044b \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0435 \u0432\u044b\u043f\u0443\u0441\u043a\u0438 X.Org Server 21.1.24 \u0438 DDX-\u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u0430 (Device-Dependent X) xwayland 24.1.13, \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0438\u0432\u0430\u044e\u0449\u0435\u0433\u043e \u0437\u0430\u043f\u0443\u0441\u043a X.Org Server \u0434\u043b\u044f \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u0430\u0446\u0438\u0438 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f X11-\u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u0432 \u043e\u043a\u0440\u0443\u0436\u0435\u043d\u0438\u044f\u0445 \u043d\u0430 \u0431\u0430\u0437\u0435.\" \/>\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\/cs\/blog\/news\/obnovlenie-x-org-server-21-1-24-xwayland-24-1-13-i-libxfont2-2-0-8-s-ustraneniem-uyazvimostej\" \/>\n\t\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.3\" \/>\n\t\t<meta property=\"og:locale\" content=\"cs_CZ\" \/>\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\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 X.Org Server 21.1.24, xwayland 24.1.13 \u0438 libXfont2 2.0.8 \u0441 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 | ProHoster\" \/>\n\t\t<meta property=\"og:description\" content=\"\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u044b \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0435 \u0432\u044b\u043f\u0443\u0441\u043a\u0438 X.Org Server 21.1.24 \u0438 DDX-\u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u0430 (Device-Dependent X) xwayland 24.1.13, \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0438\u0432\u0430\u044e\u0449\u0435\u0433\u043e \u0437\u0430\u043f\u0443\u0441\u043a X.Org Server \u0434\u043b\u044f \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u0430\u0446\u0438\u0438 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f X11-\u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u0432 \u043e\u043a\u0440\u0443\u0436\u0435\u043d\u0438\u044f\u0445 \u043d\u0430 \u0431\u0430\u0437\u0435.\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/prohoster.info\/cs\/blog\/news\/obnovlenie-x-org-server-21-1-24-xwayland-24-1-13-i-libxfont2-2-0-8-s-ustraneniem-uyazvimostej\" \/>\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=\"2026-07-08T08:54:06+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2026-07-08T08:54:06+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\udd47Aktualizace X.Org Serveru 21.1.24, xwayland 24.1.13 a libXfont2 2.0.8 s odstran\u011bn\u00edm zranitelnost\u00ed | ProHoster","description":"Byly zve\u0159ejn\u011bny opravy X.Org Serveru 21.1.24 a DDX komponenty (Device-Dependent X) xwayland 24.1.13, kter\u00e9 umo\u017e\u0148uj\u00ed spu\u0161t\u011bn\u00ed X.Org Serveru pro prov\u00e1d\u011bn\u00ed X11 aplikac\u00ed v prost\u0159ed\u00edch zalo\u017een\u00fdch na.","canonical_url":"https:\/\/prohoster.info\/cs\/blog\/news\/obnovlenie-x-org-server-21-1-24-xwayland-24-1-13-i-libxfont2-2-0-8-s-ustraneniem-uyazvimostej","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"cs_CZ","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\u0431\u043d\u043e\u0432\u043b\u0435\u043d\u0438\u0435 X.Org Server 21.1.24, xwayland 24.1.13 \u0438 libXfont2 2.0.8 \u0441 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u0438\u0435\u043c \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0435\u0439 | ProHoster","og:description":"\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d\u044b \u043a\u043e\u0440\u0440\u0435\u043a\u0442\u0438\u0440\u0443\u044e\u0449\u0438\u0435 \u0432\u044b\u043f\u0443\u0441\u043a\u0438 X.Org Server 21.1.24 \u0438 DDX-\u043a\u043e\u043c\u043f\u043e\u043d\u0435\u043d\u0442\u0430 (Device-Dependent X) xwayland 24.1.13, \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0438\u0432\u0430\u044e\u0449\u0435\u0433\u043e \u0437\u0430\u043f\u0443\u0441\u043a X.Org Server \u0434\u043b\u044f \u043e\u0440\u0433\u0430\u043d\u0438\u0437\u0430\u0446\u0438\u0438 \u0432\u044b\u043f\u043e\u043b\u043d\u0435\u043d\u0438\u044f X11-\u043f\u0440\u0438\u043b\u043e\u0436\u0435\u043d\u0438\u0439 \u0432 \u043e\u043a\u0440\u0443\u0436\u0435\u043d\u0438\u044f\u0445 \u043d\u0430 \u0431\u0430\u0437\u0435.","og:url":"https:\/\/prohoster.info\/cs\/blog\/news\/obnovlenie-x-org-server-21-1-24-xwayland-24-1-13-i-libxfont2-2-0-8-s-ustraneniem-uyazvimostej","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":"2026-07-08T08:54:06+00:00","article:modified_time":"2026-07-08T08:54:06+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":{"post_id":"182538","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":"2026-08-05 12:22:07","updated":"2026-08-05 12:22:07","focus_keyword":null,"additional_keywords":null,"truseo_locale":null},"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts\/182538","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/users\/10"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/comments?post=182538"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts\/182538\/revisions"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/media?parent=182538"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/categories?post=182538"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/tags?post=182538"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}