{"id":"RLSA-2026:19342","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: xwayland: X.Org X server: Denial of Service via integer underflow in XKB compatibility map handling (CVE-2026-33999)\n\n* xwayland: xorg: X.Org X server: Information disclosure and denial of service via out-of-bounds read in XKB geometry processing. (CVE-2026-34000)\n\n* xorg: xwayland: X.Org X server: Use-after-free vulnerability leads to server crash and potential memory corruption (CVE-2026-34001)\n\n* xorg: xwayland: X.Org X server: Information exposure and denial of service via out-of-bounds memory access (CVE-2026-34003)\n\n* TigerVNC: x0vncserver: TigerVNC x0vncserver: Information disclosure, data manipulation, and denial of service via incorrect permissions (CVE-2026-34352)\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":"2026-05-28T16:00:26.705636277Z","published":"2026-05-28T15:43:06.024531Z","upstream":["CVE-2026-33999","CVE-2026-34000","CVE-2026-34001","CVE-2026-34003","CVE-2026-34352"],"references":[{"type":"ADVISORY","url":"https://errata.rockylinux.org/RLSA-2026:19342"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2451106"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2451107"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2451109"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2451113"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2452022"}],"affected":[{"package":{"name":"tigervnc","ecosystem":"Rocky Linux:9","purl":"pkg:rpm/rocky-linux/tigervnc?distro=rocky-linux-9&epoch=0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:1.15.0-7.el9_8.1"}],"database_specific":{"yum_repository":"AppStream"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2026:19342.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}],"credits":[{"name":"Rocky Enterprise Software Foundation"},{"name":"Red Hat"}]}