Synopsis
Important: libX11 security update
Description
The libX11 packages contain the core X11 protocol client library.
Security Fix(es):
* libX11: libX11: Heap-based buffer overflow via malicious X server (CVE-2026-88806)
For 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.
Affected products
Rocky Linux 9 aarch64
Rocky Linux 9 ppc64le
Rocky Linux 9 s390x
Rocky Linux 9 x86_64
Fixes
2538514
CVEs
CVE-2026-88806
Affected packages
Rocky Linux 9 aarch64 - AppStream
libX11-0:1.8.12-1.el9_8.1.aarch64.rpm
libX11-0:1.8.12-1.el9_8.1.src.rpm
libX11-common-0:1.8.12-1.el9_8.1.noarch.rpm
libX11-debuginfo-0:1.8.12-1.el9_8.1.aarch64.rpm
libX11-debugsource-0:1.8.12-1.el9_8.1.aarch64.rpm
libX11-devel-0:1.8.12-1.el9_8.1.aarch64.rpm
libX11-xcb-0:1.8.12-1.el9_8.1.aarch64.rpm
libX11-xcb-debuginfo-0:1.8.12-1.el9_8.1.aarch64.rpm
Rocky Linux 9 x86_64 - AppStream
libX11-0:1.8.12-1.el9_8.1.i686.rpm
libX11-0:1.8.12-1.el9_8.1.src.rpm
libX11-0:1.8.12-1.el9_8.1.x86_64.rpm
libX11-common-0:1.8.12-1.el9_8.1.noarch.rpm
libX11-debuginfo-0:1.8.12-1.el9_8.1.i686.rpm
libX11-debuginfo-0:1.8.12-1.el9_8.1.x86_64.rpm
libX11-debugsource-0:1.8.12-1.el9_8.1.i686.rpm
libX11-debugsource-0:1.8.12-1.el9_8.1.x86_64.rpm
libX11-devel-0:1.8.12-1.el9_8.1.i686.rpm
libX11-devel-0:1.8.12-1.el9_8.1.x86_64.rpm
libX11-xcb-0:1.8.12-1.el9_8.1.i686.rpm
libX11-xcb-0:1.8.12-1.el9_8.1.x86_64.rpm
libX11-xcb-debuginfo-0:1.8.12-1.el9_8.1.i686.rpm
libX11-xcb-debuginfo-0:1.8.12-1.el9_8.1.x86_64.rpm
Rocky Linux 9 ppc64le - AppStream
libX11-0:1.8.12-1.el9_8.1.ppc64le.rpm
libX11-0:1.8.12-1.el9_8.1.src.rpm
libX11-common-0:1.8.12-1.el9_8.1.noarch.rpm
libX11-debuginfo-0:1.8.12-1.el9_8.1.ppc64le.rpm
libX11-debugsource-0:1.8.12-1.el9_8.1.ppc64le.rpm
libX11-devel-0:1.8.12-1.el9_8.1.ppc64le.rpm
libX11-xcb-0:1.8.12-1.el9_8.1.ppc64le.rpm
libX11-xcb-debuginfo-0:1.8.12-1.el9_8.1.ppc64le.rpm
Rocky Linux 9 s390x - AppStream
libX11-0:1.8.12-1.el9_8.1.s390x.rpm
libX11-0:1.8.12-1.el9_8.1.src.rpm
libX11-common-0:1.8.12-1.el9_8.1.noarch.rpm
libX11-debuginfo-0:1.8.12-1.el9_8.1.s390x.rpm
libX11-debugsource-0:1.8.12-1.el9_8.1.s390x.rpm
libX11-devel-0:1.8.12-1.el9_8.1.s390x.rpm
libX11-xcb-0:1.8.12-1.el9_8.1.s390x.rpm
libX11-xcb-debuginfo-0:1.8.12-1.el9_8.1.s390x.rpm