{"id":"ALSA-2026:11656","summary":"Important: xorg-x11-server-Xwayland security update","details":"Xwayland is an X server for running X clients under Wayland.  \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  * xorg: xwayland: X.Org X server: Use-after-free vulnerability leads to server crash and potential memory corruption (CVE-2026-34001)\n  * xorg: xwayland: X.Org X server: Information exposure and denial of service via out-of-bounds memory access (CVE-2026-34003)\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":"2026-04-30T14:45:27.660271Z","published":"2026-04-29T00:00:00Z","related":["CVE-2026-33999","CVE-2026-34001","CVE-2026-34003"],"references":[{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:11656"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-33999"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-34001"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-34003"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2451106"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2451109"},{"type":"REPORT","url":"https://bugzilla.redhat.com/2451113"},{"type":"ADVISORY","url":"https://errata.almalinux.org/8/ALSA-2026-11656.html"}],"affected":[{"package":{"name":"xorg-x11-server-Xwayland","ecosystem":"AlmaLinux:8","purl":"pkg:rpm/almalinux/xorg-x11-server-Xwayland"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"21.1.3-20.el8_10"}]}],"database_specific":{"source":"https://github.com/AlmaLinux/osv-database/blob/master/advisories/almalinux8/ALSA-2026:11656.json"}}],"schema_version":"1.7.5"}