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xorg-x11-server: xorg-x11-server-Xwayland: xorg-x11-server: use-after-free information disclosure in CreateSaverWindow()

🗓️ 07 Jul 2026 06:51:04Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 9 Views

Use-after-free in CreateSaverWindow allows disclosure during screen saver in Xorg server and Xwayland after attribute changes.

Related
Packages
Refs
ReporterTitlePublishedViews
Family
FreeBSD		xwayland -- Multiple vulnerabilities
1 Jun 202600:00
–freebsd
FreeBSD		xorg-server -- Multiple vulnerabilities
1 Jun 202600:00
–freebsd
ATTACKERKB		CVE-2026-50263
5 Jun 202610:36
–attackerkb
Tenable Nessus		Amazon Linux 2023 : xorg-x11-server-Xwayland, xorg-x11-server-Xwayland-devel (ALAS2023-2026-1789)
8 Jun 202600:00
–nessus
Tenable Nessus		Amazon Linux 2023 : xorg-x11-server-common, xorg-x11-server-devel, xorg-x11-server-source (ALAS2023-2026-1790)
8 Jun 202600:00
–nessus
Tenable Nessus		Amazon Linux 2023 : tigervnc, tigervnc-icons, tigervnc-license (ALAS2023-2026-1892)
22 Jun 202600:00
–nessus
Tenable Nessus		Amazon Linux 2 : xorg-x11-server, --advisory ALAS2-2026-3336 (ALAS-2026-3336)
8 Jun 202600:00
–nessus
Tenable Nessus		Alibaba Cloud Linux 3 : 0166: xorg-x11-server (ALINUX3-SA-2026:0166)
1 Jul 202600:00
–nessus
Tenable Nessus		Alibaba Cloud Linux 3 : 0177: tigervnc (ALINUX3-SA-2026:0177)
1 Jul 202600:00
–nessus
Tenable Nessus		Alibaba Cloud Linux 3 : 0183: xorg-x11-server-Xwayland (ALINUX3-SA-2026:0183)
9 Jul 202600:00
–nessus
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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux9.6aarch64xorg-x11-server-xdmx0:1.20.11-34.el9_6xorg-x11-server-Xdmx-0:1.20.11-34.el9_6.aarch64.rpm
Red Hat Enterprise Linux9.6ppc64lexorg-x11-server-xdmx0:1.20.11-34.el9_6xorg-x11-server-Xdmx-0:1.20.11-34.el9_6.ppc64le.rpm
Red Hat Enterprise Linux9.6s390xxorg-x11-server-xdmx0:1.20.11-34.el9_6xorg-x11-server-Xdmx-0:1.20.11-34.el9_6.s390x.rpm
Red Hat Enterprise Linux9.6x86_64xorg-x11-server-xdmx0:1.20.11-34.el9_6xorg-x11-server-Xdmx-0:1.20.11-34.el9_6.x86_64.rpm
Red Hat Enterprise Linux9.6aarch64xorg-x11-server-xdmx-debuginfo0:1.20.11-34.el9_6xorg-x11-server-Xdmx-debuginfo-0:1.20.11-34.el9_6.aarch64.rpm
Red Hat Enterprise Linux9.6ppc64lexorg-x11-server-xdmx-debuginfo0:1.20.11-34.el9_6xorg-x11-server-Xdmx-debuginfo-0:1.20.11-34.el9_6.ppc64le.rpm
Red Hat Enterprise Linux9.6s390xxorg-x11-server-xdmx-debuginfo0:1.20.11-34.el9_6xorg-x11-server-Xdmx-debuginfo-0:1.20.11-34.el9_6.s390x.rpm
Red Hat Enterprise Linux9.6x86_64xorg-x11-server-xdmx-debuginfo0:1.20.11-34.el9_6xorg-x11-server-Xdmx-debuginfo-0:1.20.11-34.el9_6.x86_64.rpm
Red Hat Enterprise Linux9.6anyxorg-x11-server-xdmx-debuginfo0:1.20.11-34.el9_6.i686xorg-x11-server-Xdmx-debuginfo-0:1.20.11-34.el9_6.i686.noarch.rpm
Red Hat Enterprise Linux9.6aarch64xorg-x11-server-xephyr0:1.20.11-34.el9_6xorg-x11-server-Xephyr-0:1.20.11-34.el9_6.aarch64.rpm
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08 Jul 2026 19:26Current
6.1Medium risk
Vulners AI Score6.1
CVSS 3.15.5
EPSS0.00141
SSVC
CWE-416
use after freecreate saver windowxorg serverxwaylandscreen saver
9