{"schema_version": "1.7.0", "id": "RLSA-2026:91366", "modified": "2026-10-30T12:13:23.635077Z", "published": "2026-10-30T12:08:48.996475Z", "upstream": ["CVE-2026-88806"], "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.", "severity": [{"type": "CVSS_V3", "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"}], "affected": [{"package": {"ecosystem": "Rocky Linux:10", "name": "libX11", "purl": "pkg:rpm/rocky-linux/libX11?distro=rocky-linux-10&epoch=0"}, "ranges": [{"type": "ECOSYSTEM", "events": [{"introduced": "0"}, {"fixed": "0:1.8.10-1.el10_2.1"}], "database_specific": {"yum_repository": "AppStream"}}]}], "references": [{"type": "ADVISORY", "url": "https://errata.rockylinux.org/RLSA-2026:91366"}, {"type": "REPORT", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2538514"}, {"type": "ADVISORY", "url": "https://access.redhat.com/errata/RHSA-2026:91366"}], "credits": [{"name": "Rocky Enterprise Software Foundation"}, {"name": "Red Hat"}], "database_specific": {"license": "CC-BY-4.0", "license_url": "https://creativecommons.org/licenses/by/4.0/", "source_advisory": "RHSA-2026:91366"}}