{"id":"ALSA-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  * xorg-x11-server: xorg-x11-server: Privilege escalation via crafted RandR provider property requests (CVE-2026-93521)\n  * xorg-x11-server: xwayland: xorg-x11-server: Arbitrary code execution via double-free in XKB geometry handling (CVE-2026-88812)\n  * xorg-x11-server: xorg-x11-server: Out-of-bounds write via unvalidated modifier in ProcXIPassiveUngrabDevice (CVE-2026-93523)\n  * xorg-x11-server: xorg-x11-server: arbitrary code execution via GLX RenderLarge heap-based buffer overflow (CVE-2026-93517)\n  * xorg-x11-server: xorg-x11-server: arbitrary code execution via integer truncation during keyboard mapping resize (CVE-2026-93518)\n  * xorg-x11-server: xorg-x11-server: Arbitrary code execution via buffer overflow in input_constrain_cursor() (CVE-2026-93519)\n  * xorg-x11-server: xorg-x11-server: arbitrary code execution via out-of-bounds write in XKB keycode handling (CVE-2026-93520)\n\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.\n","modified":"2026-11-13T12:15:02.330977035Z","published":"2026-11-12T00:00:00Z","related":["CVE-2026-88812","CVE-2026-93516","CVE-2026-93517","CVE-2026-93518","CVE-2026-93519","CVE-2026-93520","CVE-2026-93521","CVE-2026-93523"],"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"],"references":[{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:99623"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-88812"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-93516"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-93517"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-93518"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-93519"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-93520"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-93521"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-93523"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2545161"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2545164"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2545174"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2545177"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2545246"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2545860"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2545887"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2545908"},{"type":"ADVISORY","url":"https://errata.almalinux.org/8/ALSA-2026-99623.html"}],"affected":[{"package":{"name":"tigervnc","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/tigervnc"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.15.0-11.el8_10"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2026:99623.json"}},{"package":{"name":"tigervnc-icons","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/tigervnc-icons"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.15.0-11.el8_10"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2026:99623.json"}},{"package":{"name":"tigervnc-license","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/tigervnc-license"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.15.0-11.el8_10"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2026:99623.json"}},{"package":{"name":"tigervnc-selinux","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/tigervnc-selinux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.15.0-11.el8_10"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2026:99623.json"}},{"package":{"name":"tigervnc-server","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/tigervnc-server"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.15.0-11.el8_10"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2026:99623.json"}},{"package":{"name":"tigervnc-server-minimal","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/tigervnc-server-minimal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.15.0-11.el8_10"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2026:99623.json"}},{"package":{"name":"tigervnc-server-module","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/tigervnc-server-module"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.15.0-11.el8_10"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2026:99623.json"}}],"schema_version":"1.9.2"}