{"id":1344,"date":"2026-08-05T13:00:00","date_gmt":"2026-08-05T13:00:00","guid":{"rendered":"https:\/\/netguide.io\/news\/2026\/08\/05\/gnome-50-4-schliesst-kritische-gdm-sicherheitsluecken\/"},"modified":"2026-08-17T23:10:04","modified_gmt":"2026-08-17T23:10:04","slug":"gnome-50-4-schliesst-kritische-gdm-sicherheitsluecken","status":"publish","type":"post","link":"https:\/\/netguide.io\/news\/de\/2026\/08\/05\/gnome-50-4-schliesst-kritische-gdm-sicherheitsluecken\/","title":{"rendered":"GNOME 50.4 schlie\u00dft kritische GDM-Sicherheitsl\u00fccken"},"content":{"rendered":"<div id=\"netgu-2257083199\" class=\"netgu-before-content netgu-entity-placement\"><script async src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-6258556257245998\" crossorigin=\"anonymous\"><\/script><ins class=\"adsbygoogle\" style=\"display:block;\" data-ad-client=\"ca-pub-6258556257245998\" \ndata-ad-slot=\"3494115342\" \ndata-ad-format=\"auto\"><\/ins>\n<script> \n(adsbygoogle = window.adsbygoogle || []).push({}); \n<\/script>\n<\/div>\n<p class=\"wp-block-paragraph\"><strong>Das GNOME-Projekt hat am 5. August 2026 die Wartungsversion 50.4 (sowie einen Backport als 49.9) ver\u00f6ffentlicht. Im Mittelpunkt stehen mehrere behobene Sicherheitsl\u00fccken im Anmeldemanager GDM sowie sp\u00fcrbare Verbesserungen bei der Bildschirmausgabe.<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Die GDM-Sicherheitskorrekturen<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Path-Traversal:<\/strong> Ein kompromittierter Greeter konnte \u00fcber die SelectSession-Schnittstelle beliebige <code>.desktop<\/code>-Dateien laden.<\/li>\n\n\n\n<li><strong>Autologin-Bypass:<\/strong> \u00dcber <code>BeginAutoLogin<\/code> lie\u00df sich mit beliebigen Benutzernamen die automatische Anmeldung f\u00fcr lokale Konten anfordern.<\/li>\n\n\n\n<li><strong>Denial of Service:<\/strong> Ein ung\u00fcltiger Sitzungsname konnte den gesamten GDM-Daemon beenden und damit alle aktiven Sitzungen abbrechen.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Zus\u00e4tzlich werden zwischengespeicherte Klartext-Passphrasen nun vor der Freigabe aus dem Speicher gel\u00f6scht, und neue Bereichspr\u00fcfungen verhindern Lesezugriffe au\u00dferhalb der Keyring-Puffer. F\u00fcr Systeme mit grafischer Anmeldung sind diese Fixes der wichtigste Grund f\u00fcr ein zeitnahes Update.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Bessere Darstellung mit Mutter 50.4<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Der Compositor Mutter behebt unscharfe Darstellung bei Monitor-Konfigurationen, die nicht exakt auf physische Pixel ausgerichtet sind, und bietet keine nicht unterst\u00fctzten Fallback-Modi mehr an. Auch fehlerhafte Neuzeichnungsbereiche auf gedrehten Displays wurden korrigiert, und die HDR-Ausgabe f\u00fcllt nun die Mastering-Display-Metadaten korrekt. Dazu kommen Feinschliff bei Men\u00fc-Animationen und ein behobener Sound-Glitch in der Shell.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Quellen: <a href=\"https:\/\/linuxiac.com\/gnome-50-4-brings-gdm-security-fixes-and-better-display-handling\/\" target=\"_blank\" rel=\"noopener\">Linuxiac<\/a>, <a href=\"https:\/\/www.linuxcompatible.org\/story\/gnome-ships-gnome-504-and-499-with-critical-gdm-security-patches\" target=\"_blank\" rel=\"noopener\">linuxcompatible.org<\/a>.<\/em><\/p>\n<div id=\"netgu-1131450148\" class=\"netgu-after-content netgu-entity-placement\"><script async src=\"\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js?client=ca-pub-6258556257245998\" crossorigin=\"anonymous\"><\/script><ins class=\"adsbygoogle\" style=\"display:block;\" data-ad-client=\"ca-pub-6258556257245998\" \ndata-ad-slot=\"4559785002\" \ndata-ad-format=\"auto\"><\/ins>\n<script> \n(adsbygoogle = window.adsbygoogle || []).push({}); \n<\/script>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>GNOME 50.4 behebt mehrere GDM-Sicherheitsl\u00fccken \u2013 von Path-Traversal \u00fcber einen Autologin-Bypass bis zu einem DoS \u2013 und verbessert die Bildschirmausgabe.<\/p>\n","protected":false},"author":1,"featured_media":1500,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[],"tags":[],"class_list":["post-1344","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry"],"brizy_media":[],"_links":{"self":[{"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/posts\/1344","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/comments?post=1344"}],"version-history":[{"count":1,"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/posts\/1344\/revisions"}],"predecessor-version":[{"id":1501,"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/posts\/1344\/revisions\/1501"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/media\/1500"}],"wp:attachment":[{"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/media?parent=1344"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/categories?post=1344"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/netguide.io\/news\/wp-json\/wp\/v2\/tags?post=1344"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}