{"id":"RLSA-2026:38490","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: X11: xserver: X.org: glamor Font Atlas Heap Buffer Overflow (CVE-2026-55999)\n\n* X.org: xorg-x11-server: GLX contextTags Use-After-Free in CommonMakeCurrent() (CVE-2026-56000)\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":"2026-07-14T12:30:06.021426766Z","published":"2026-07-14T12:03:23.695448Z","upstream":["CVE-2026-55999","CVE-2026-56000"],"references":[{"type":"ADVISORY","url":"https://errata.rockylinux.org/RLSA-2026:38490"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2496165"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2496193"}],"affected":[{"package":{"name":"xorg-x11-server-Xwayland","ecosystem":"Rocky Linux:9","purl":"pkg:rpm/rocky-linux/xorg-x11-server-Xwayland?distro=rocky-linux-9&epoch=0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:24.1.9-4.el9_8.3"}],"database_specific":{"yum_repository":"AppStream"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2026:38490.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"}],"credits":[{"name":"Rocky Enterprise Software Foundation"},{"name":"Red Hat"}]}