Oracle Errata System Oracle Linux 5.11 2026-10-29T17:24:37 ELSA-2026-91365: libX11 security update (IMPORTANT) Oracle Linux 9 [1.8.12-1.1] - CVE-2026-88806 libX11: libX11: Heap-based buffer overflow via malicious X server X server IMPORTANT Copyright 2026 Oracle, Inc. CVE-2026-88806 cpe:/a:oracle:linux:9::appstream libX11-common libX11-devel libX11 libX11-xcb oraclelinux-release bc4d06a08d8b756f ^9 aarch64 0:1.8.12-1.el9_8.1 x86_64