Red Hat Security Advisory

RHSA-2026:91366

libX11 security update

Released 2026-10-27 · Red Hat rating Important · View on Red Hat →

Fixed in

Red Hat Enterprise Linux AppStream (v. 10) libX11-1.8.10-1.el10_2.1, libX11-common-1.8.10-1.el10_2.1, libX11-devel-1.8.10-1.el10_2.1 +1

TI-2026-60214 CVE-2026-88806 · GHSA-xrgw-w7v2-3qp8

LOW 34

A malicious X server could exploit a buffer overflow in libX11 before 1.8.14 during handling of XkbGetMap overflowing the key_sym_map.

CVSS 3.1HIGH 7.5 Network No auth User interaction EPSS 0.00202 Published 2026-09-21 Partial fix · 1.8.14 CWE-122