{"id":"RLSA-2026:99623","summary":"Important: tigervnc security update","details":"Virtual Network Computing (VNC) is a remote display system which allows users to view a computing desktop environment not only on the machine where it is running, but from anywhere on the Internet and from a wide variety of machine architectures. TigerVNC is a suite of VNC servers and clients.\n\nSecurity Fix(es):\n\n* xorg-x11-server: xorg-x11-server: Arbitrary code execution via use-after-free in passive grab handling (CVE-2026-93516)\n\n* xorg-x11-server: xorg-x11-server: Privilege escalation via crafted RandR provider property requests (CVE-2026-93521)\n\n* xorg-x11-server: xwayland: xorg-x11-server: Arbitrary code execution via double-free in XKB geometry handling (CVE-2026-88812)\n\n* xorg-x11-server: xorg-x11-server: Out-of-bounds write via unvalidated modifier in ProcXIPassiveUngrabDevice (CVE-2026-93523)\n\n* xorg-x11-server: xorg-x11-server: arbitrary code execution via GLX RenderLarge heap-based buffer overflow (CVE-2026-93517)\n\n* xorg-x11-server: xorg-x11-server: arbitrary code execution via integer truncation during keyboard mapping resize (CVE-2026-93518)\n\n* xorg-x11-server: xorg-x11-server: Arbitrary code execution via buffer overflow in input_constrain_cursor() (CVE-2026-93519)\n\n* xorg-x11-server: xorg-x11-server: arbitrary code execution via out-of-bounds write in XKB keycode handling (CVE-2026-93520)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.","modified":"2026-11-13T06:30:09.456405195Z","published":"2026-11-13T06:01:39.166938Z","upstream":["CVE-2026-88812","CVE-2026-93516","CVE-2026-93517","CVE-2026-93518","CVE-2026-93519","CVE-2026-93520","CVE-2026-93521","CVE-2026-93523"],"database_specific":{"license":"CC-BY-4.0","license_url":"https://creativecommons.org/licenses/by/4.0/","source_advisory":"RHSA-2026:99623"},"references":[{"type":"ADVISORY","url":"https://errata.rockylinux.org/RLSA-2026:99623"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2545161"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2545164"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2545174"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2545177"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2545246"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2545860"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2545887"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2545908"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:99623"}],"affected":[{"package":{"name":"tigervnc-server-module-debuginfo","ecosystem":"Rocky 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