{"id":"RLSA-2026:89730","summary":"Important: libX11 security update","details":"The libX11 packages contain the core X11 protocol client library.\n\nSecurity Fix(es):\n\n* libX11: libX11: Heap-based buffer overflow via malicious X server (CVE-2026-88806)\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":"2026-10-27T12:30:02.538887873Z","published":"2026-10-27T12:01:24.400471Z","upstream":["CVE-2026-88806"],"database_specific":{"license_url":"https://creativecommons.org/licenses/by/4.0/","source_advisory":"RHSA-2026:89730","license":"CC-BY-4.0"},"references":[{"type":"ADVISORY","url":"https://errata.rockylinux.org/RLSA-2026:89730"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2538514"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:89730"}],"affected":[{"package":{"name":"libX11","ecosystem":"Rocky Linux:8","purl":"pkg:rpm/rocky-linux/libX11?distro=rocky-linux-8&epoch=0"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0:1.6.8-10.el8_10"}],"database_specific":{"yum_repository":"AppStream"}}],"database_specific":{"source":"https://storage.googleapis.com/resf-osv-data/RLSA-2026:89730.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"}],"credits":[{"name":"Rocky Enterprise Software Foundation"},{"name":"Red Hat"}]}