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A use-after-free flaw was found in the X.Org X server and Xwayland in CreateSaverWindow(). A client can trigger a use-after-free read after changing window attributes and forcing the screen saver, leading to information disclosure.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade tigervnc-licenseUpgrade xorg-x11-server-XvfbUpgrade tigervnc-server-moduleUpgrade xorg-x11-server-XdmxUpgrade xorg-x11-server-commonUpgrade xorg-x11-server-sourceUpgrade xorg-x11-server-develUpgrade tigervncUpgrade xorg-x11-server-XephyrUpgrade xorg-x11-server-XwaylandUpgrade tigervnc-serverUpgrade tigervnc-iconsUpgrade xorg-x11-server-Xwayland-develUpgrade xorg-x11-server-XnestUpgrade tigervnc-selinuxUpgrade xorg-x11-server-XorgUpgrade tigervnc-server-minimal | Jun 17, 2026 | Jun 17, 2026 |
| Amazon Linux Ami 2 | — | Upgrade xorg-x11-server-XnestUpgrade xorg-x11-server-XorgUpgrade xorg-x11-server-XvfbUpgrade xorg-x11-server-sourceUpgrade xorg-x11-server-commonUpgrade xorg-x11-server-XwaylandUpgrade xorg-x11-server-XephyrUpgrade xorg-x11-server-XdmxUpgrade xorg-x11-server-debuginfoUpgrade xorg-x11-server-devel | Jun 16, 2026 | Jun 16, 2026 |
| Amazon_linux_2023 | — | Upgrade tigervnc-licenseUpgrade xorg-x11-server-sourceUpgrade xorg-x11-server-XwaylandUpgrade xorg-x11-server-XorgUpgrade xorg-x11-server-Xwayland-debugsourceUpgrade xorg-x11-server-develUpgrade xorg-x11-server-commonUpgrade tigervnc-selinuxUpgrade tigervnc-server-minimal-debuginfoUpgrade tigervncUpgrade xorg-x11-server-Xwayland-debuginfoUpgrade xorg-x11-server-Xephyr-debuginfoUpgrade xorg-x11-server-XephyrUpgrade xorg-x11-server-XvfbUpgrade tigervnc-server-debuginfoUpgrade tigervnc-debuginfoUpgrade xorg-x11-server-Xvfb-debuginfoUpgrade xorg-x11-server-XnestUpgrade xorg-x11-server-Xorg-debuginfoUpgrade tigervnc-serverUpgrade xorg-x11-server-Xnest-debuginfoUpgrade tigervnc-debugsourceUpgrade tigervnc-iconsUpgrade xorg-x11-server-debuginfoUpgrade tigervnc-server-moduleUpgrade tigervnc-server-minimalUpgrade tigervnc-server-module-debuginfoUpgrade xorg-x11-server-debugsourceUpgrade xorg-x11-server-Xwayland-devel | Jun 15, 2026 | Jun 5, 2026 |
| Debian | — | Upgrade xorg-server | Jul 23, 2026 | Jul 23, 2026 |
| Freebsd | — | Upgrade xorg-serverUpgrade xwayland | Jun 15, 2026 | Jun 1, 2026 |
| Gentoo Linux | — | Upgrade x11-base/xwayland.Upgrade x11-base/xorg-server. | Aug 17, 2026 | Aug 17, 2026 |
| Oracle_linux | — | Upgrade tigervnc-iconsUpgrade xorg-x11-server-XwaylandUpgrade xorg-x11-server-XnestUpgrade xorg-x11-server-commonUpgrade xorg-x11-server-XorgUpgrade tigervnc-serverUpgrade xorg-x11-server-Xwayland-develUpgrade xorg-x11-server-XdmxUpgrade xorg-x11-server-XvfbUpgrade tigervnc-server-moduleUpgrade tigervnc-licenseUpgrade xorg-x11-server-XephyrUpgrade tigervnc-server-minimalUpgrade xorg-x11-server-develUpgrade tigervnc-selinuxUpgrade tigervncUpgrade xorg-x11-server-source | Oct 22, 2026 | Jun 5, 2026 |
| Redhat_linux | — | Upgrade xorg-x11-server-Xwayland-debugsourceUpgrade tigervnc-server-minimal-debuginfoUpgrade xorg-x11-server-sourceUpgrade xorg-x11-server-XephyrUpgrade xorg-x11-server-Xvfb-debuginfoNo solution existsUpgrade tigervncUpgrade xorg-x11-server-XnestUpgrade xorg-x11-server-Xnest-debuginfoUpgrade xorg-x11-server-XdmxUpgrade xorg-x11-server-XvfbUpgrade tigervnc-server-debuginfoUpgrade xorg-x11-server-develUpgrade tigervnc-licenseUpgrade tigervnc-server-module-debuginfoUpgrade tigervnc-server-appletUpgrade xorg-x11-server-XorgUpgrade tigervnc-selinuxUpgrade tigervnc-debugsourceUpgrade xorg-x11-server-Xorg-debuginfoUpgrade tigervnc-serverUpgrade xorg-x11-server-Xephyr-debuginfoUpgrade xorg-x11-server-Xwayland-debuginfoUpgrade xorg-x11-server-Xdmx-debuginfoUpgrade xorg-x11-server-debugsourceUpgrade tigervnc-debuginfoUpgrade tigervnc-server-minimalUpgrade tigervnc-server-moduleUpgrade tigervnc-iconsUpgrade xorg-x11-server-Xwayland-develUpgrade xorg-x11-server-commonUpgrade xorg-x11-server-XwaylandUpgrade xorg-x11-server-debuginfo | Jun 19, 2026 | Jun 2, 2026 |
| Rocky_linux | — | Upgrade xorg-x11-server-Xdmx-debuginfoUpgrade tigervnc-server-moduleUpgrade xorg-x11-server-debuginfoUpgrade xorg-x11-server-Xwayland-debugsourceUpgrade tigervnc-serverUpgrade xorg-x11-server-XdmxUpgrade xorg-x11-server-XnestUpgrade xorg-x11-server-debugsourceUpgrade xorg-x11-server-Xorg-debuginfoUpgrade xorg-x11-server-Xwayland-develUpgrade xorg-x11-server-develUpgrade tigervnc-server-minimalUpgrade tigervnc-debugsourceUpgrade xorg-x11-server-XwaylandUpgrade xorg-x11-server-Xnest-debuginfoUpgrade xorg-x11-server-XvfbUpgrade tigervnc-debuginfoUpgrade xorg-x11-server-Xephyr-debuginfoUpgrade tigervnc-server-module-debuginfoUpgrade xorg-x11-server-XorgUpgrade xorg-x11-server-XephyrUpgrade tigervncUpgrade tigervnc-server-debuginfoUpgrade xorg-x11-server-Xwayland-debuginfoUpgrade xorg-x11-server-commonUpgrade tigervnc-server-minimal-debuginfoUpgrade xorg-x11-server-Xvfb-debuginfo | Jun 22, 2026 | Jun 19, 2026 |
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